{"product_id":"caplugs-300-3531-b20-slide-fix-pap-jar-screw-caps","title":"Caps, HDPE, Blue — 300-3531-B20 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003eSlide-Fix™ PAP Jar Screw Caps — HDPE, Blue, Non-Sterile, 1000\/Bag (300-3531-B20)\u003c\/h2\u003e\n\u003cp\u003eThese Slide-Fix™ PAP jar screw caps are molded from high-density polyethylene (HDPE) and designed as replacement or spare closure caps for PAP jar cytology fixative containers commonly used in histology and cytology workflows. Supplied in blue for convenient color-coded identification, part number 300-3531-B20 is packed 1000 per bag to support high-volume laboratory procurement needs. The screw-cap design provides a secure, leak-resistant closure to help contain fixative solutions during specimen transport and storage.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e300-3531-B20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePAP Jar Screw Cap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003eSlide-Fix™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSterility\u003c\/td\u003e\n\u003ctd\u003eNon-Sterile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eReplacement closures for PAP jar cytology fixative containers in histology and cytology laboratories\u003c\/li\u003e\n\u003cli\u003eColor-coded cap organization to differentiate specimen batches or fixative types\u003c\/li\u003e\n\u003cli\u003eSecure containment of aqueous fixative solutions during specimen transport and storage\u003c\/li\u003e\n\u003cli\u003eHigh-volume clinical and anatomic pathology lab consumable stocking\u003c\/li\u003e\n\u003cli\u003eGeneral laboratory container capping where a screw-thread HDPE closure is appropriate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMaterial \u0026amp; Chemical Resistance\u003c\/h2\u003e\n\u003cp\u003eHigh-density polyethylene offers excellent general chemical resistance, including good compatibility with aqueous solutions, dilute acids and bases, and many common laboratory fixatives and buffers. HDPE is rigid yet impact-resistant and provides reliable performance across a broad range of routine laboratory chemicals. Note that HDPE is not recommended for autoclaving; for solvent-heavy applications, verify compatibility with specific reagents before use.\u003c\/p\u003e\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA, Caplugs® Evergreen Slide-Fix™ screw caps are manufactured under ISO 9001 quality management from BPA-free, phthalate-free, latex-free HDPE resin. LabSupplies.com is an authorized dealer and ships from USA inventory, typically same business day for stocking items, with tiered pricing available for institutional and high-volume laboratory accounts.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these screw caps sterile?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4\"\u003eNo — they are supplied non-sterile in 1000\/Bag bulk packaging, which is standard for cytology fixative jar closures used in routine histology and pathology workflows.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these caps compatible with fixative solutions typically used in PAP jars?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4\"\u003eHDPE offers broad chemical resistance to aqueous fixative solutions and many common laboratory reagents, making it well suited for routine PAP jar closure applications. Always verify compatibility if using unusual or highly concentrated chemical fixatives.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy are the caps blue?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4\"\u003eThe blue color supports color-coded organization in the laboratory, allowing staff to visually differentiate jar batches, fixative types, or specimen groups at a glance — a practical benefit in busy cytology and pathology departments.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Slide-Fix™ PAP Jar Screw Caps, HDPE, Blue, Non-Sterile, 1000\/Bag\",\"sku\":\"3003531B20E1\",\"mpn\":\"300-3531-B20\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Blue\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"84.94\",\"availability\":\"https:\/\/schema.org\/InStock\"}}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Are these screw caps sterile?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — they are supplied non-sterile in 1000\/Bag bulk packaging, which is standard for cytology fixative jar closures used in routine histology and pathology workflows.\"}},{\"@type\":\"Question\",\"name\":\"Are these caps compatible with fixative solutions typically used in PAP jars?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"HDPE offers broad chemical resistance to aqueous fixative solutions and many common laboratory reagents, making it well suited for routine PAP jar closure applications. Always verify compatibility if using unusual or highly concentrated chemical fixatives.\"}},{\"@type\":\"Question\",\"name\":\"Why are the caps blue?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The blue color supports color-coded organization in the laboratory, allowing staff to visually differentiate jar batches, fixative types, or specimen groups at a glance — a practical benefit in busy cytology and pathology departments.\"}}]}\u003c\/script\u003e","brand":"Caplugs® Evergreen","offers":[{"title":"Default Title","offer_id":48580045242600,"sku":"3003531B20E1","price":101.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/5361\/1240\/files\/300-3532-B20_01.jpg?v=1779410279","url":"https:\/\/labsupplies.com\/products\/caplugs-300-3531-b20-slide-fix-pap-jar-screw-caps","provider":"LabSupplies.com","version":"1.0","type":"link"}