{"product_id":"caplugs-300-3532-e20-hdpe-screw-cap-20ml-vial-30ml-centrifuge-tube-orange","title":"20 mL Centrifuge Tubes, Screw Caps, HDPE, Orange — 300-3532-E20 | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e20 mL Vial \u0026amp; 30 mL Centrifuge Tube Screw Caps — HDPE, Orange, 1000\/Bag (300-3532-E20)\u003c\/h2\u003e\n\u003cp\u003eThese orange High-Density Polyethylene screw caps from Caplugs® Evergreen are engineered to fit 20 mL screw-neck vials and 30 mL centrifuge tubes, providing a leak-free threaded closure for specimen transport, cryogenic archiving, and centrifugation workflows. Part number 300-3532-E20 belongs to the 15-color 300-3532 family, all sharing identical HDPE material and thread geometry — orange is the color designation for high-visibility STAT and priority routing in processing environments. Each bag contains 1,000 caps for high-volume clinical, biorepository, and field-collection programs.\u003c\/p\u003e\n\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\u003e300-3532-E20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCap Type\u003c\/td\u003e\n\u003ctd\u003eScrew cap — threaded engagement\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\u003eOrange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTube Compatibility\u003c\/td\u003e\n\u003ctd\u003eCaplugs® Evergreen 20 mL screw-neck vials; 30 mL centrifuge tubes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Note\u003c\/td\u003e\n\u003ctd\u003eLarger thread than 300-3010\/300-3022 (15 mL cap family) — not interchangeable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIATA P650 Compliance\u003c\/td\u003e\n\u003ctd\u003eYes — leak-free primary container seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryogenic Storage\u003c\/td\u003e\n\u003ctd\u003eCompatible to −80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclave Compatibility\u003c\/td\u003e\n\u003ctd\u003eYes — 121°C \/ 15 psi\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\u003eBPA \/ Phthalates\u003c\/td\u003e\n\u003ctd\u003eBPA-free; no phthalate plasticizers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1,000\/Bag\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd\u003eUSA (California)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTAT and priority specimen routing:\u003c\/strong\u003e Orange caps are immediately identifiable in processing racks, enabling urgent accessioning without secondary label scanning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiological specimen transport:\u003c\/strong\u003e IATA P650 compliant leak-free closure for safe shipment of 20 mL vials and 30 mL centrifuge tubes containing biological material.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBiorepository cryogenic archiving:\u003c\/strong\u003e HDPE retains structural integrity at −80°C, making these caps suitable for ultra-low temperature storage of large-format tubes in long-term biobanking programs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentrifugation:\u003c\/strong\u003e Threaded engagement holds securely through centrifuge forces during serum separation, cell pelleting, and related spin protocols in 30 mL tubes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell culture:\u003c\/strong\u003e HDPE is compatible with standard culture media formulations for large-volume incubation applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnvironmental and field sampling:\u003c\/strong\u003e Chemical inertness of HDPE makes these caps well suited for water, soil, and field-collection programs requiring a robust large-volume closure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement cap programs:\u003c\/strong\u003e Serves as a direct replacement for lost or damaged caps on existing Caplugs® Evergreen 20 mL vial and 30 mL centrifuge tube inventories where the thread specification matches.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThese screw caps are designed to fit Caplugs® Evergreen 20 mL screw-neck vials and 30 mL centrifuge tubes. The 300-3532 thread specification is larger than that of the 300-3010 and 300-3022 cap families used with 15 mL tubes — the two families are not interchangeable. Before placing a bulk order as a replacement cap, validate thread fit with a sample set against your existing tube inventory to confirm compatibility. All 15 colors in the 300-3532 range share the same HDPE formulation and thread geometry, so color is the only variable between SKUs.\u003c\/p\u003e\n\n\u003ch2\u003eChemical Resistance\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReagent \/ Condition\u003c\/th\u003e\n\u003cth\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAqueous buffers \/ saline\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDilute acids and bases\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcohols (ethanol, isopropanol)\u003c\/td\u003e\n\u003ctd\u003eGood — suitable for most lab concentrations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMany organic solvents (general)\u003c\/td\u003e\n\u003ctd\u003eGood — HDPE offers broad organic resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorinated solvents (e.g., chloroform)\u003c\/td\u003e\n\u003ctd\u003eLimited — verify before use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAromatic solvents (e.g., toluene, xylene)\u003c\/td\u003e\n\u003ctd\u003eLimited — verify before use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryogenic storage (to −80°C)\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAutoclave (121°C \/ 15 psi)\u003c\/td\u003e\n\u003ctd\u003eCompatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eQuality \u0026amp; Procurement\u003c\/h2\u003e\n\u003cp\u003eMade in USA at Caplugs® Evergreen's California manufacturing facility, these HDPE screw caps are produced from BPA-free, phthalate-free resin and are IATA P650 compliant for biological specimen transport. LabSupplies.com is an authorized Caplugs® Evergreen dealer, shipping from USA inventory with same-business-day dispatch available for stocking items. Tiered volume pricing is available for clinical laboratories, hospital networks, biorepositories, and grant-funded research institutions — contact our procurement team for institutional account setup.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill these caps fit my existing 15 mL centrifuge tubes?\u003c\/strong\u003e\u003cbr\u003eNo. The 300-3532 thread specification is larger than the thread used on the 300-3010 and 300-3022 cap families, which are designed for 15 mL tubes. These caps are sized for 20 mL screw-neck vials and 30 mL centrifuge tubes only. Always validate fit with a sample before committing to a bulk order.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these caps sterile?\u003c\/strong\u003e\u003cbr\u003eNo — they are supplied non-sterile in 1,000\/Bag packaging. They are autoclavable at 121°C \/ 15 psi, so laboratory teams that require a sterile closure can process them in-house prior to use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy choose orange caps rather than a neutral color?\u003c\/strong\u003e\u003cbr\u003eOrange provides an immediate visual cue in busy processing racks and sorting workflows. Laboratories that use a color-coded routing vocabulary can assign orange to STAT draws, a specific specimen type, or a priority accession group, reducing the need for secondary label scanning during high-throughput accessioning.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these caps compatible with ultra-low temperature freezer storage?\u003c\/strong\u003e\u003cbr\u003eYes. HDPE maintains structural integrity and thread engagement at −80°C, making these caps appropriate for biorepository programs that archive large-format 20 mL or 30 mL tubes at ultra-low temperature.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"20 mL Vial \u0026 30 mL Centrifuge Tube Screw Caps, HDPE, Orange, 1000\/Bag — Caplugs® Evergreen 300-3532-E20\",\"sku\":\"300-3532-E20\",\"mpn\":\"300-3532-E20\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Orange\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"114.28\",\"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\":\"Will these caps fit my existing 15 mL centrifuge tubes?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The 300-3532 thread specification is larger than the thread used on the 300-3010 and 300-3022 cap families, which are designed for 15 mL tubes. 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