Upgrade your laboratory efficiency with these premium 8mm 8-425 Open-Top Screw Caps featuring high-quality Pre-Slit PTFE/Silicone Septa. Specially designed for high-performance chromatography applications, these caps ensure smooth operation and reliable sample protection.
Pre-Slit Septa Design: Allows the autosampler needle to pierce through easily, significantly reducing the risk of bent needles and preventing vacuum formation during sample aspiration.
Dual-Layer Protection:
PTFE Layer: Offers outstanding chemical resistance as the direct contact face for your samples.
Silicone Layer: Provides excellent elasticity and resealing capabilities after injection.
Precision Fit: Features a 5.5mm center hole (open top) housed in a durable black polypropylene (PP) screw cap.
| Parameter | Specification |
| Product Type | Screw Cap with Septa (Laboratory Use Only) |
| Closure/Neck Finish | 8-425 / 8mm Screw Thread |
| Dimensions | 8 x 1.5 mm |
| Center Hole Size | 5.5 mm (Open Top) |
| Cap Material | Premium Polypropylene (PP Plastic) |
| Septa Material | PTFE Layer / Silicone Layer |
| Color | Black Cap / Natural PTFE & White Silicone Septa |
| Compatibility | Strictly fits 8-425 screw top vials (Does NOT fit 9mm vials) |
Choose the perfect pack size tailored to your laboratory needs from our dropdown menu:
300 pcs
500 pcs
1000 pcs
Caps and Septa only. Vials are sold separately unless purchased as part of an explicit bundle listing.
For laboratory research use only. Not intended for medical injection or hypodermic procedures.