Caplugs® Evergreen
16.0 mL Test Tubes, LDPE, Natural — 222-3817-02S | 1000/Bag | Caplugs® Evergreen
16.0 mL Test Tubes, LDPE, Natural — 222-3817-02S | 1000/Bag | Caplugs® Evergreen
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Quick Reference
| Part Number | 222-3817-02S |
|---|---|
| Product | Two-position snap caps for 17 mm PS test tubes |
| Cap Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Tube Diameter | 17 mm OD |
| Tube Material | PS (dimensionally optimized for PS tube tolerances) |
| Cap Function | Position 1: vented; Position 2: fully closed |
| Pack Size | 1000/Bag |
| Sterility | Sterile |
| Origin | Made in USA |
| Price | $67.72/Bag ($0.0678/cap) |
Technical Narrative
The Caplugs® Evergreen 222-3817-02S provides Sterile LDPE Two-Position Snap Caps for 17 mm PS test tubes, 1000/Bag, completing the snap cap size set alongside 12 mm PP (222-3812-02P), 12 mm PS (222-3812-02S), and 17 mm PP (222-3817-02P). The 17 mm tube format corresponds to the 16.0 mL round-bottom PS tube and other 17 mm OD PS tube formats. LDPE snap cap optimized for PS tube wall dimensional tolerances.
Low-Density Polyethylene (LDPE): flexible snap mechanism for PS tube OD, low extractables, broad chemical resistance. BPA-free, phthalate-free, FDA-compliant,
Procurement economics: $67.72/Bag (1000 caps), $0.0678/cap. Full snap cap set: 222-3817-02P (17 mm PP snap caps 1000/Bag); 222-3812-02S (12 mm PS snap caps 1000/Bag). LabSupplies.com ships from USA inventory, typically same business day.
Technical Specifications
| Part Number | |
|---|---|
| Caplugs Item # | |
| Product | Two-position snap caps for 17 mm PS test tubes |
| Cap Material | Low-Density Polyethylene (LDPE) |
| Color | Natural |
| Tube Diameter | 17 mm OD |
| Tube Material | PS |
| Cap Positions | Position 1: vented (partial open); Position 2: fully closed |
| Sterility | Sterile |
| Pack Size | 1000/Bag |
| BPA / Phthalate | BPA-Free, Phthalate-Free, Latex-Free |
| Country of Origin | USA |
| Price | $67.72/Bag ($0.0678/cap) |
Two-Position Snap Cap (17 mm PS Tube) Applications
The snap cap is compatible with 17 mm OD PS test tubes requiring a two-position vented/closed closure.
| Application | Setting / Configuration | Notes |
|---|---|---|
| Tube capping | 17 mm PS round-bottom tube | Snap on; two-position for vented or sealed use |
| Cell culture in tube | Incubator, vented position on 17mm PS | Vented: CO2 exchange; closed: transport/storage |
| Centrifugation | Clinical centrifuge, vented pressure equalization | Vented position during spin |
| Bulk cap inventory | High-volume 16 mL tube processing lab | 1000/Bag for high-consumption labs |
| Replacement caps | Replace damaged 17mm PS tube caps | Sterile; material-matched for PS tube OD |
| Serology / flow cytometry | 16 mL PS tube agglutination or staining | Snap re-seals between incubation and reading steps |
| Complete snap cap set | 12mm PP/PS + 17mm PP/PS | Four-SKU set covers the main round-bottom tube diameter and material combinations |
Chemical Resistance — Low-Density Polyethylene (LDPE)
Compatibility reference for LDPE at typical laboratory conditions.
| Reagent / Condition | Compatibility | Notes |
|---|---|---|
| Aqueous buffers / saline | Excellent | Standard biological contact matrix. |
| Cell culture media | Excellent | Low extractables for biological contact. |
| Ethanol (<70%) | Good | Short-term compatible. |
| Formalin (10%) | Excellent | Compatible for fixation steps. |
| Acetonitrile | Limited | Avoid prolonged LDPE contact. |
| Dichloromethane | Not Compatible | Causes swelling; do not use. |
| Temperature (snap cap) | ~60°C max | Do not autoclave; sterile single-use. |
| Cryogenic temperature | Not Rated | LDPE snap cap used at room temp; not designed for LN2 contact. |
Clinical & Research Laboratory Applications
Caplugs® Evergreen sterile LDPE two-position snap caps for 17 mm PS test tubes complete the four-SKU snap cap set (12 mm PP/PS + 17 mm PP/PS), providing bulk sterile cap supply for the full range of round-bottom PS test tube formats used in clinical serology, flow cytometry, and cell biology laboratories. The 17 mm PS cap is dimensionally optimized for the PS 16 mL round-bottom tube (17×100 mm) and PS tubes of similar OD. Labs standardize on 1000/Bag separate cap supply to match cap consumption with tube consumption independently, reducing inventory imbalance when tubes and assembled caps are consumed at different rates across different workflows.
U.S. Manufacturing, Quality & Institutional Procurement
Caplugs® Evergreen products are manufactured in the United States under ISO 9001 quality management from FDA-compliant, food-contact-grade resins. BPA-free, phthalate-free, and latex-free, with material-disclosure documentation supporting CAP, CLIA, and ISO 15189 laboratory accreditation audits.
LabSupplies.com is an authorized dealer for the full Caplugs Evergreen catalog and ships directly from USA inventory — typically same business day for stocking SKUs. We offer below retail pricing on volume orders, tiered institutional and academic pricing, and direct support for grant-funded laboratories and government procurement channels. Lab managers and procurement officers can request a written quote or speak with a product specialist directly from our sales engineering team.
Frequently Asked Questions
Are the snap caps sterile?
Yes. Sterile — 1000/Bag.
What is the complete snap cap size and material set from Caplugs Evergreen?
Four SKUs: 12 mm PP (222-3812-02P), 12 mm PS (222-3812-02S), 17 mm PP (222-3817-02P), 17 mm PS . All LDPE, natural, sterile, 1000/Bag. Select by the OD and material of the test tube in your workflow.
Why is there a separate cap for PS tubes vs PP tubes of the same diameter?
PP and PS tubes of the same nominal diameter have slightly different wall thicknesses and OD tolerances due to different material properties. The snap cap's engagement detents are dimensionally optimized for each tube material to ensure reliable two-position function — proper vented engagement and full closure without over-tightness or loose fit.
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