{"product_id":"caplugs-300-3010-b2n-hdpe-screw-caps-15ml-centrifuge-transport-vial-blue","title":"15 mL Centrifuge Tubes, Screw Caps, HDPE, Blue — 300-3010-B2N | 1000\/Bag | Caplugs® Evergreen","description":"\u003ch2\u003e15 mL Centrifuge Tube \u0026amp; Transport Vial Screw Caps — HDPE, Blue, 1000\/Bag (300-3010-B2N)\u003c\/h2\u003e\n\u003cp\u003eThese blue High-Density Polyethylene (HDPE) screw caps from Caplugs® Evergreen are designed to seal 15 mL centrifuge tubes and 7 mL transport vials (240-3007\/240-3010 series) with a leak-free threaded closure that meets IATA P650 requirements for primary biological specimen packaging. Supplied non-sterile in 1000\/Bag bulk packaging, part number 300-3010-B2N is autoclave-compatible at 121°C and rated for cryogenic storage at -20°C and -80°C, making it equally at home in high-throughput clinical labs, biobank programs, and cell culture workflows.\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\u003e300-3010-B2N\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\u003eBlue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread \/ Neck Size\u003c\/td\u003e\n\u003ctd\u003eStandard centrifuge tube thread — 24 mm neck\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Tubes \/ Vials\u003c\/td\u003e\n\u003ctd\u003eCaplugs® Evergreen 15 mL centrifuge tubes; 240-3007 \/ 240-3010 7 mL transport vials\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 for biological specimen transport\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCryogenic Storage\u003c\/td\u003e\n\u003ctd\u003e-20°C and -80°C compatible\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\u003ePack Size\u003c\/td\u003e\n\u003ctd\u003e1000\/Bag\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\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\u003eReplacement cap supply for Caplugs® Evergreen 15 mL centrifuge tubes in routine clinical and research workflows\u003c\/li\u003e\n\u003cli\u003eLeak-free sealing of 240-3007 \/ 240-3010 7 mL transport vials for IATA P650-compliant air and courier shipment of human biological specimens\u003c\/li\u003e\n\u003cli\u003eCoagulation specimen management (PT, aPTT panels) — blue color aligns with CLSI H3 blue-top sodium citrate anticoagulant convention for easy batch identification in multi-specimen transport racks\u003c\/li\u003e\n\u003cli\u003eBiobank and biorepository archiving — HDPE cryostability at -80°C makes these caps suitable for long-term frozen storage of serum, plasma, and urine aliquots\u003c\/li\u003e\n\u003cli\u003eCell culture and pathogen propagation — autoclave compatibility allows pre-sterilized cap supply for programs requiring sterile capped centrifuge tubes\u003c\/li\u003e\n\u003cli\u003eCap replacement and restoration programs for archived centrifuge tubes retrieved from cryogenic storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThese screw caps thread directly onto Caplugs® Evergreen 15 mL centrifuge tubes via the standard 24 mm centrifuge tube neck, and seal the 240-3007 and 240-3010 families of 7 mL transport vials. The threaded engagement geometry delivers the torque retention needed to maintain a positive seal through centrifugation, freeze-thaw cycling, and IATA P650 transport — providing a reliable like-for-like replacement whenever OEM caps are lost, damaged, or needed in larger quantities than the original tube packaging provides. For labs that use color coding to segregate specimen types, blue is also available alongside Natural (300-3010-02N), Orange (300-3010-E2N), and Green (300-3010-G2N) variants in the same 300-3010 series.\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\u003eSerum, plasma, urine\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\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard clinical preservatives (EDTA, citrate, heparin solutions)\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcohols (short-term contact)\u003c\/td\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChlorinated \/ aromatic solvents (chloroform, toluene)\u003c\/td\u003e\n\u003ctd\u003eNot recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAcetone \/ ketones\u003c\/td\u003e\n\u003ctd\u003eNot recommended\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 (California), these HDPE screw caps are manufactured by Caplugs® Evergreen from BPA-free, phthalate-free resin under ISO 9001 quality management. HDPE's higher crystallinity compared to LDPE provides the thread-wall rigidity necessary for consistent torque engagement, dimensional stability through freeze-thaw cycling, and cap retention under centrifugation forces — properties critical to both laboratory safety and specimen integrity. LabSupplies.com is an authorized Caplugs® Evergreen dealer shipping from USA inventory, with tiered pricing available for high-volume institutional, hospital, and biorepository purchasing programs.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these caps sterile out of the bag?\u003c\/strong\u003e\u003cbr\u003eNo — the 300-3010-B2N caps are supplied non-sterile. However, they are autoclave-compatible at 121°C \/ 15 psi, so labs requiring sterile caps can process them in-house before use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill these caps fit centrifuge tubes from other manufacturers?\u003c\/strong\u003e\u003cbr\u003eThese caps are designed and validated to fit Caplugs® Evergreen 15 mL centrifuge tubes and 240-3007\/240-3010 7 mL transport vials using the standard 24 mm centrifuge tube thread. Fit on third-party tubes depends on whether those tubes use the same thread standard; we recommend confirming thread dimensions against your specific tubes before committing to a large order.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre these caps suitable for shipping patient specimens by air courier?\u003c\/strong\u003e\u003cbr\u003eYes — the threaded screw-cap closure provides the leak-free primary container seal required under IATA P650, the primary packaging standard for human biological specimens shipped by air and courier services.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy are the caps blue? Does the color affect performance?\u003c\/strong\u003e\u003cbr\u003eColor is a visual differentiation aid only and does not affect chemical resistance or mechanical performance. Blue is conventionally associated with sodium citrate anticoagulant tubes under CLSI H3 guidelines, making it a natural choice for coagulation specimen workflows (PT, aPTT) and for color-coded batch separation in multi-specimen transport racks. The same cap is available in Natural, Orange, and Green for labs that use a broader color-coding scheme.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"15 mL Centrifuge Tube \u0026 Transport Vial Screw Caps, HDPE, Blue — 1000\/Bag\",\"sku\":\"300-3010-B2N\",\"mpn\":\"300-3010-B2N\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Caplugs® Evergreen\"},\"material\":\"High-Density Polyethylene (HDPE)\",\"color\":\"Blue\",\"offers\":{\"@type\":\"Offer\",\"priceCurrency\":\"USD\",\"price\":\"67.50\",\"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 caps sterile out of the bag?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No — the caps are supplied non-sterile. 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Fit on third-party tubes depends on whether those tubes use the same thread standard; confirm thread dimensions against your specific tubes before committing to a large order.\"}},{\"@type\":\"Question\",\"name\":\"Are these caps suitable for shipping patient specimens by air courier?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes — the threaded screw-cap closure provides the leak-free primary container seal required under IATA P650, the primary packaging standard for human biological specimens shipped by air and courier services.\"}},{\"@type\":\"Question\",\"name\":\"Why are the caps blue? Does the color affect performance?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Color is a visual differentiation aid only and does not affect chemical resistance or mechanical performance. 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