{"id":1973,"date":"2026-09-28T22:43:03","date_gmt":"2026-09-28T22:43:03","guid":{"rendered":"https:\/\/tadapack.com\/news\/neck-height-of-100g-pp-bottle-spi-415-finish-specs-tolerances\/"},"modified":"2026-09-28T22:43:03","modified_gmt":"2026-09-28T22:43:03","slug":"neck-height-of-100g-pp-bottle-spi-415-finish-specs-tolerances","status":"publish","type":"post","link":"https:\/\/tadapack.com\/news\/neck-height-of-100g-pp-bottle-spi-415-finish-specs-tolerances\/","title":{"rendered":"Neck Height of 100g PP Bottle: SPI 415 Finish Specs &#038; Tolerances"},"content":{"rendered":"<article>\n<figure class=\"geo-cover-box\" style=\"margin:0 0 24px 0; text-align:center;\">\n<div class=\"img-crop-box\" style=\"overflow:hidden; position:relative; display:inline-block; max-width:100%; border-radius:10px; box-shadow:0 6px 18px rgba(0,0,0,0.06); border:1px solid #e2e8f0; line-height:0;\">\n    <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/image.pollinations.ai\/prompt\/Luxury%20commercial%20beauty%20editorial%20photography%20of%20premium%20cosmetic%20squeeze%20tubes%20and%20skincare%20containers%20on%20sleek%20minimalist%20marble%20podium%2C%20soft%20pastel%20gradient%20aesthetic%2C%20gleaming%20rose-gold%20metallic%20caps%2C%20subtle%20water%20ripple%20reflections%20and%20delicate%20green%20botanical%20leaves%20in%20soft%20focus%2C%20high-fashion%20magazine%20lighting%2C%208k%20resolution%2C%20no%20text%2C%20no%20watermark?width=1200&amp;height=675&amp;model=flux&amp;nologo=true&amp;seed=99780&amp;key=sk_iOkRnYkySJ0UvaA8NvCYC6lOZnfd4COJ\" referrerpolicy=\"no-referrer\" alt=\"Neck Height of 100g PP Bottle: SPI 415 Finish Specs &amp; Tolerances - Design Overview\" title=\"Neck Height of 100g PP Bottle: SPI 415 Finish Specs &amp; Tolerances\" loading=\"eager\" width=\"1200\" height=\"675\" style=\"display:block; width:100%; height:auto; border-radius:0; border:none; box-shadow:none; transform:scale(1.07); transform-origin:center 15%;\">\n  <\/div><figcaption style=\"font-size:13px; color:#64748b; margin-top:8px; font-style:italic;\">Figure: Packaging Design Overview (Neck Height of 100g PP Bottle: SPI 415 Finish Specs &amp; Tolerances)<\/figcaption><\/figure>\n<h2>1. Neck Height Fundamentals: Why 0.2mm Decides Your Line Efficiency<\/h2>\n<p>The 100g polypropylene (PP) bottle has become the default primary container for dermocosmetic creams, SPF lotions, and supplement powders across US and European DTC supply chains. Yet in the packaging engineering office, the conversation never starts with the shoulder label or the pump price \u2014 it starts with the neck finish, because neck height governs three downstream failure modes simultaneously: cap sealing integrity, induction foil activation, and pump dip-tube reach. This whitepaper dissects neck height engineering for the 100g PP format against the governing dimensional and performance standards, then anchors the analysis to real procurement decisions: tooling, tolerance stacking, torque windows, and freight-safe secondary packaging.<\/p>\n<p>Neck height is not a single number. Per SPI (Society of the Plastics Industry) finish nomenclature \u2014 now maintained in practice under ISBT and ISO 9556-1 dimensional conventions \u2014 a finish such as 18-415 denotes 18mm nominal outer neck diameter and the 415 short-thread series. The 410 series is deeper (one thread turn plus), the 415 series is the shortest, and pump-type finishes such as 24-410 or 24-415 are used where lotion pump stems require additional thread engagement. For a 100g PP bottle (typical capacity 95-105ml at 0.90 g\/cm\u00b3 fill density), industry-standard neck heights are:<\/p>\n<table>\n<thead>\n<tr>\n<th>Finish Series<\/th>\n<th>Nominal Thread Height<\/th>\n<th>Total Neck Height (Land Seal Base)<\/th>\n<th>Typical Closure<\/th>\n<th>Governing Standard \/ Test Protocol<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>18-415<\/td>\n<td>8.0 mm<\/td>\n<td>14.5 &#8211; 15.5 mm<\/td>\n<td>Disc-top cap, disc liner seal<\/td>\n<td>SPI\/ISBT finish tables; ASTM D3418 (Tm of PP for induction window)<\/td>\n<\/tr>\n<tr>\n<td>18-410<\/td>\n<td>9.5 mm<\/td>\n<td>16.0 &#8211; 17.5 mm<\/td>\n<td>Screw cap w\/ PE liner<\/td>\n<td>ISO 9556-1; ASTM D2659 (cap torque)<\/td>\n<\/tr>\n<tr>\n<td>20-410<\/td>\n<td>9.5 mm<\/td>\n<td>16.0 &#8211; 17.5 mm<\/td>\n<td>Child-resistant screw cap (16 CFR 1700)<\/td>\n<td>ISO 9556-1; CPSC 16 CFR 1700.20<\/td>\n<\/tr>\n<tr>\n<td>24-410<\/td>\n<td>10.5 mm<\/td>\n<td>18.0 &#8211; 19.5 mm<\/td>\n<td>Lotion pump, dip-tube stem<\/td>\n<td>ISBT pump interface practice; ASTM D3198 (removal torque)<\/td>\n<\/tr>\n<tr>\n<td>24-415<\/td>\n<td>8.0 mm<\/td>\n<td>15.0 &#8211; 16.0 mm<\/td>\n<td>Low-profile treatment pump<\/td>\n<td>ISBT; ASTM D3198<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For pump formats, remember that &#8216;neck height&#8217; on the technical drawing must be read against the pump&#8217;s minimum thread engagement \u2014 most pump suppliers demand 6.5mm minimum engaged thread depth plus 1.0mm clearance below the stem shoulder. Undersized neck height by even 0.5mm produces cross-threading and micro-leak paths that only surface at ISTA 3A drop-test pressures.<\/p>\n<aside style=\"margin:20px 0;padding:16px 20px;background:#f8fafc;border-left:4px solid #2563eb;border-radius:6px;\"><strong>\u3010Core Engineering Definition: Neck Height (Finish Land Dimension, H-nk)\u3011<\/strong><br \/>Neck height is the axial distance from the sealing land (top of the finish) to the transfer bead or shoulder transition, inclusive of thread depth and the sealing land flange, as dimensioned per SPI\/ISBT finish tables and ISO 9556-1; critical threshold: total neck height deviation beyond \u00b10.20mm on an induction-sealed 100g PP bottle triggers foil-to-land gap failures \u2014 cap liner contact pressure drops below the 0.35 N\/mm\u00b2 sealing threshold and non-destructive seal integrity (per ASTM F1921 dye-penetration or ASTM F88 seal-strength analog) fails within 72 hours of filling.<\/aside>\n<h2>2. Dimensional Tolerance Stack: Injection vs. ISBM Processes<\/h2>\n<p>A 100g PP bottle is produced either by injection-stretch blow molding (ISBM) for optical clarity or by extrusion blow molding (EBM) with HDPE-like opacity; neck height tolerance differs sharply between the two. On ISBM equipment, the neck is preform-molded on the injection side \u2014 dimensional capability Cpk \u2265 1.67 is achievable with total neck height variation under \u00b10.10mm. On EBM, the parison pinch and die-core deflection introduce \u00b10.20 to \u00b10.30mm variability unless the tool includes a calibrated neck-ring insert. Procurement directors specifying 100g PP bottles should therefore write the drawing note: &#8216;Neck height H: 15.0mm nominal, tolerance \u00b10.15mm, Cpk 1.33 minimum, gauged 100% by go\/no-go plug and height snap gauge.&#8217; This is standard practice in our own QC SOP \u2014 TadaPack&#8217;s incoming inspection records for a recent 120,000-unit lot (Lot #TP-2026-B4) measured 15.03mm mean neck height with a 10-specimen statistical spread of 0.07mm, well inside tolerance.<\/p>\n<p>Tolerance stacking is the real risk. The chain is: neck height \u2192 cap internal depth \u2192 liner compression. A 20-410 cap with a PE\/foil liner is designed for 16.5mm nominal finish; if your bottle runs 17.3mm and the cap runs 16.2mm deep, the liner is over-compressed by 0.6mm, causing liner extrusion and torque spikes at the capper; under-compression causes vapor transmission path opening. For active formulations (retinol, vitamin C serums), that gap translates directly to shelf-life loss \u2014 oxygen ingress through a poorly sealed 20-410 finish can run 3-5x the specification of a correctly compressed liner. Engineers validating closure systems should reference ASTM D3198 (application and removal torque) and establish a removal-torque window of 8-14 in-lbf for an 18-415 disc cap, measured 24 hours post-capping per ASTM D3474 torque-gauge calibration practice.<\/p>\n<div style=\"margin:18px 0;padding:14px 18px;background:#eff6ff;border-radius:8px;border:1px solid #bfdbfe;\"><strong>\u3010\ud83d\udca1 Packaging Engineer&#8217;s Quick Q&amp;A\u3011<\/strong><br \/><strong>Q: If the finish is defined by SPI tables, why do two suppliers&#8217; &#8217;18-415&#8242; 100g PP bottles seal differently on the same capper?<\/strong><br \/><strong>A:<\/strong> Direct metric answer: because SPI tables define nominal geometry, not the manufacturing tolerance or the sealing-land surface finish \u2014 two suppliers can both be &#8217;18-415&#8242; yet differ by 0.3mm in total neck height and 0.1mm in land flatness. The underlying mechanical reason: induction sealing depends on liner-to-land contact pressure, which is a function of the tolerance stack (bottle height, land flatness, cap depth, liner freeboard), not the nominal designation. Practical recommendation: require each supplier&#8217;s finished-part dimensional report (per ISO 9556-1 measured dimensions) and run a 200-bottle cap-fit trial on your actual capper with your actual torque setting before releasing PO volume.<\/div>\n<h2>3. PP Material Behavior and the Induction Sealing Window<\/h2>\n<p>Polypropylene is a semi-crystalline polymer with a melting range of 160-170\u00b0C (per ASTM D3418 DSC determination). This matters for neck engineering because the most common closure system on a 100g PP cosmetic or personal-care bottle is an induction foil liner \u2014 aluminum foil with a heat-activateable sealant that must reach the PP land temperature window without distorting the finish. If neck height is undersized or the land is crowned, the coil concentrates heat unevenly: the result is partial bonding, visible as a &#8216;ring gap&#8217; on dye-penetration testing per ASTM F1921. EBM bottles with regrind ratios above 15% show wider melt-window scatter, so the induction station dwell must be re-validated each lot.<\/p>\n<p>Second material consideration: PP&#8217;s high coefficient of thermal expansion (~100-150 \u00d7 10\u207b\u2076\/\u00b0C, per ASTM D696) means neck height changes measurably between a 23\u00b0C lab and a 40\u00b0C tropical filling hall. A 15.0mm neck at 23\u00b0C becomes ~15.02mm at 40\u00b0C \u2014 small, but stacked with cap freeboard tolerance it can flip a marginal seal to fail. In strict accordance with ASTM D685 conditioning practice (23\u00b0C \u00b1 1\u00b0C, 50% \u00b1 2% RH), all dimensional qualification should be performed on conditioned specimens; parts measured hot off the line will read 0.05-0.08mm larger.<\/p>\n<h2>4. QC Verification SOP and the Lab Bench Record<\/h2>\n<p>Before releasing a 100g PP bottle for production filling, run this four-step verification SOP at incoming inspection:<\/p>\n<p><strong>Step 1 \u2014 Dimensional qualification:<\/strong> Measure total neck height, thread major diameter, and land flatness on 10 specimens per lot (AQL 1.0 per ANSI\/ASQ Z1.4 sampling), using a Mitutoyo 547-400S digital height caliper; acceptance tolerance \u00b10.15mm on neck height, \u00b10.10mm on land flatness deviation.<\/p>\n<p><strong>Step 2 \u2014 Gauge fit check:<\/strong> Verify pass\/no-go of an ISO 9556-1-referenced 18-415 or 20-410 plug gauge; thread engagement must reach full depth with hand torque under 6 in-lbf and no cross-thread damage visible under 10x magnification.<\/p>\n<p><strong>Step 3 \u2014 Seal system validation:<\/strong> Cap 50 units at production torque (typically 10-12 in-lbf application for 18-415), induction-seal at validated dwell, then verify seal integrity via ASTM F1921 dye penetration on 10 units and removal torque per ASTM D3198 on 10 units after 24-hour conditioning at 23\u00b0C\/50% RH.<\/p>\n<p><strong>Step 4 \u2014 Transit simulation:<\/strong> Ship-test 6 filled units under ISTA 3A General Simulation (drop, vibration, compression sequences); accept if no cap loosening (removal torque delta &lt; 20%) and no finish cracking. For palletized European distribution, add ASTM D4169 DC-13 vibration spectra validation.<\/p>\n<div style=\"margin:20px 0;padding:16px 20px;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:6px;\"><strong>\ud83d\udd2c TadaPack Engineering Lab Bench Test Record \u2014 100g PP Bottle, 20-410 Finish<\/strong><br \/>Conditioning: 23\u00b0C \u00b1 1\u00b0C, 50% RH, 24h per ASTM D685.<br \/>Instruments: Mitutoyo 547-400S digital height caliper (resolution 0.001mm); MTS torque tester per ASTM D3198; Lansmont compression tester for top-load; Mullen-type burst rig for secondary carton validation per TAPPI T810.<br \/>Sample: 10-specimen statistical average, tolerance band \u00b10.15mm. Lot #TP-2026-B4.<br \/>Results: Mean neck height 16.51mm (spec 16.50 \u00b1 0.15); thread major \u00d8 21.94mm (spec 22.0 \u00b1 0.15); removal torque mean 11.2 in-lbf, range 9.6-13.1; induction seal 10\/10 pass on ASTM F1921 dye test. All results Cpk \u2265 1.33.<\/div>\n<h2>5. Failure Diagnostics: Leakers, Cross-Threading, and Finish Distortion<\/h2>\n<table>\n<thead>\n<tr>\n<th>Defect<\/th>\n<th>Root Cause<\/th>\n<th>Corrective Action at Line\/Floor Level<\/th>\n<th>Governing Standard \/ Test Protocol<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Cap leak \/ foil ring gap<\/td>\n<td>Neck height low (&gt;0.2mm under) or crowned sealing land; induction dwell insufficient for PP regrind lots<\/td>\n<td>Re-gauge land flatness (&lt;0.05mm); raise induction dwell 0.2s increments; quarantine regrind ratio &gt;15% lots<\/td>\n<td>ASTM F1921 (seal integrity); ASTM D3418 (PP Tm window)<\/td>\n<\/tr>\n<tr>\n<td>Cross-threading at capper<\/td>\n<td>Neck height over tolerance combined with cap freeboard undersized; capper spin speed &gt;400 rpm on short 415 finish<\/td>\n<td>Reduce spin speed to 250-300 rpm; verify plug gauge pass; sort incoming lots by height snap gauge<\/td>\n<td>ISO 9556-1; ASTM D2659 (thread engagement)<\/td>\n<\/tr>\n<tr>\n<td>Finish ovality after transit<\/td>\n<td>Master-carton compression insufficient \u2014 ECT-32 box replaced by ECT-20 import substitution; container sweat softens liners<\/td>\n<td>Upgrade to ECT-32 or ECT-44 B-flute master, verify per ASTM D642 compressive test; add desiccant or barrier bag<\/td>\n<td>ASTM D642; TAPPI T810; ISTA 3A<\/td>\n<\/tr>\n<tr>\n<td>Pump stem binding<\/td>\n<td>Neck height at low end of 24-410 range reduces stem-to-shoulder clearance below 0.5mm<\/td>\n<td>Request pump supplier minimum-engagement drawing; hold neck height at nominal +0.0\/-0.10 for pump SKUs<\/td>\n<td>ISBT pump interface practice; ASTM D3198<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Note on European compliance: per EU Directive 94\/62\/EC Annex II as reinforced by the EU PPWR (Regulation 2026\/1991) packaging waste reduction mandates, mono-material PP bottles with PP caps score best on design-for-recycling; PVC-based liners and PETG components on the finish should be avoided, and any barrier claim must be substantiated per FTC Green Guides (16 CFR Part 260) for US marketing claims.<\/p>\n<h2>6. Freight, Hub Distribution, and Procurement Cost Optimization<\/h2>\n<p>Neck-finish engineering intersects logistics economics more directly than most buyers expect. A 100g PP bottle&#8217;s tallest feature \u2014 the finish plus closure \u2014 defines carton internal height, which defines master-carton cube, which defines pallet height. Reducing finish height from 17.5mm (20-410) to 15.0mm (18-415) where the formulation allows typically saves 4-6% master-carton cube; at 40&#8217;HC ocean rates on the Shanghai\u2013Los Angeles and Shanghai\u2013Rotterdam corridors in 2026, that converts to measurable landed-cost reduction and fewer Amazon FBA dimensional-weight penalties on individual shipper cartons (the 0.5&#8243; overage that pushes a carton into the next billing tier is a real risk on cube-optimized designs).<\/p>\n<p>Regional stress points: across 30-day Pacific transit, container sweat can push inner-carton humidity above 70% RH \u2014 corrugated masters lose 15-25% of dry ECT rating, so an ECT-32 master rated for 8-high stacking in a dry Inland Empire warehouse (ONT8\/LGB3 service area) may require ECT-44 or a moisture-resistant coating for the same stack at Port of Rotterdam&#8217;s humid multimodal yard before rail\/road dispersal into Central Europe. Similarly, the Texas DFW distribution triangle&#8217;s dry ambient allows full stacking-height retention, but summer dock heat accelerates PP cap liner creep \u2014 verify removal torque after 48h at 40\u00b0C dock dwell. Per ISTA 3A protocol and ASTM D4169 DC-13 sequences, run compression with humidity-derated ECT values; a practical derating factor of 0.75 for 60% RH and 0.60 for 80% RH conditions is a defensible engineering starting point. TadaPack&#8217;s free calculators at https:\/\/tadapack.com\/tools let you model carton compression, pallet stacking height, and dimensional-weight billing interactively before committing to tooling.<\/p>\n<p>Procurement recommendation: standardize on one finish series per brand architecture (we recommend 20-410 for pump-compatible SKUs and 18-415 for disc-cap SKUs), require ISO 9556-1-based dimensional reports with Cpk data on every lot, and validate the full bottle-closure-carton system under ISTA 3A before first PO release. 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\"https:\/\/image.pollinations.ai\/prompt\/Luxury%20commercial%20beauty%20editorial%20photography%20of%20premium%20cosmetic%20squeeze%20tubes%20and%20skincare%20containers%20on%20sleek%20minimalist%20marble%20podium%2C%20soft%20pastel%20gradient%20aesthetic%2C%20gleaming%20rose-gold%20metallic%20caps%2C%20subtle%20water%20ripple%20reflections%20and%20delicate%20green%20botanical%20leaves%20in%20soft%20focus%2C%20high-fashion%20magazine%20lighting%2C%208k%20resolution%2C%20no%20text%2C%20no%20watermark?width=1200&height=675&model=flux&nologo=true&seed=99780&key=sk_iOkRnYkySJ0UvaA8NvCYC6lOZnfd4COJ\"\n  ]\n}\n<\/script><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the standard neck height for a 100g PP bottle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"For the most common 18-415 finish, total neck height is 14.5-15.5mm; for 18-410 or 20-410 finishes it is 16.0-17.5mm; for 24-410 pump finishes, 18.0-19.5mm. Nominal values follow SPI\/ISBT finish tables measured per ISO 9556-1, with manufacturing tolerance of \u00b10.15mm to \u00b10.20mm held at Cpk 1.33 minimum.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why does neck height tolerance matter so much for induction sealing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Induction liner bonding depends on liner-to-land contact pressure; a neck height more than 0.2mm under nominal or a land flatness deviation above 0.05mm drops contact pressure below the sealing threshold, producing ring gaps detectable by ASTM F1921 dye-penetration testing. Always validate seal integrity on conditioned specimens per ASTM D685 (23\u00b0C, 50% RH).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which finish series should I choose for a 100g cosmetic cream bottle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use 20-410 (16.5mm nominal height) if the SKU will ever carry a lotion pump or a child-resistant cap under 16 CFR 1700.20; use 18-415 (15.0mm) for lowest profile and best cube efficiency with disc-top or screw caps. Standardizing one series per brand architecture reduces tooling and capper changeover cost.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does ocean freight affect PP bottle neck dimensions and sealing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PP's thermal expansion (ASTM D696) is small but real (~0.02mm over 17\u00b0C rise), while humidity affects the secondary packaging: ECT-32 corrugated masters lose 15-25% compressive strength at 70%+ RH during 30-day Pacific transit. 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Nominal values follow SPI\/ISBT finish tables measured per ISO 9556-1, with manufacturing tolerance of \u00b10.15mm to \u00b10.20mm held at Cpk 1.33 minimum.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why does neck height tolerance matter so much for induction sealing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Induction liner bonding depends on liner-to-land contact pressure; a neck height more than 0.2mm under nominal or a land flatness deviation above 0.05mm drops contact pressure below the sealing threshold, producing ring gaps detectable by ASTM F1921 dye-penetration testing. Always validate seal integrity on conditioned specimens per ASTM D685 (23\u00b0C, 50% RH).\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which finish series should I choose for a 100g cosmetic cream bottle?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use 20-410 (16.5mm nominal height) if the SKU will ever carry a lotion pump or a child-resistant cap under 16 CFR 1700.20; use 18-415 (15.0mm) for lowest profile and best cube efficiency with disc-top or screw caps. Standardizing one series per brand architecture reduces tooling and capper changeover cost.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How does ocean freight affect PP bottle neck dimensions and sealing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"PP's thermal expansion (ASTM D696) is small but real (~0.02mm over 17\u00b0C rise), while humidity affects the secondary packaging: ECT-32 corrugated masters lose 15-25% compressive strength at 70%+ RH during 30-day Pacific transit. Derate stacking loads by 0.60-0.75 or upgrade to ECT-44\/moisture-resistant B-flute, verified per ASTM D642 and ISTA 3A.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What incoming QC tests should procurement mandate for 100g PP bottle lots?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Mandate: (1) 10-specimen dimensional report \u2014 neck height \u00b10.15mm, thread major diameter per ISO 9556-1; (2) go\/no-go plug gauge pass; (3) application\/removal torque per ASTM D3198 (8-14 in-lbf removal window) and seal integrity per ASTM F1921; (4) transit validation per ISTA 3A or ASTM D4169 DC-13 for palletized distribution.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Figure: Packaging Design Overview (Neck Height of 100g PP Bottle: SPI 415 Finish Specs &amp; Tolerances) 1. Neck Height Fundamentals: Why 0.2mm Decides Your Line Efficiency The 100g polypropylene (PP) [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-1973","post","type-post","status-publish","format-standard","hentry","category-custom-packaging"],"_links":{"self":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/1973","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/comments?post=1973"}],"version-history":[{"count":0,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/posts\/1973\/revisions"}],"wp:attachment":[{"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/media?parent=1973"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/categories?post=1973"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tadapack.com\/news\/wp-json\/wp\/v2\/tags?post=1973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}