Date: 14-APRIL-2020 Last Updated: 27-OCTOBER-2025
No, Snap Caps are specifically designed to be used only with vials that have a snap-ring finish—commonly referred to as Snap Ring Vials or Snap Top Vials.
These vials feature a specially designed top that allows the "snap cap" to securely attach.
Using snap caps on crimp‑top vials, also known as a serum finish vial, should be avoided entirely. The neck design of a crimp‑top vial does not provide the snap‑ring feature required to hold a snap cap in place, resulting in poor sealing, insecure closure, and the potential for sample loss or contamination.
NOTE: Crimp caps, on the other hand, are optimized for vials with a serum finish—often referred to as crimp‑top vials. These vials provide the correct neck structure, sealing surface, and mechanical stability needed for a crimp cap to achieve a tight, reliable seal. While crimp caps can sometimes be used on snap‑ring vials, this is not their intended application and may result in less‑than‑ideal performance.
Summary:
- Snap Caps → Only for Snap Top Vials (with snap-ring finish)
- Crimp Caps → Best used with Crimp Top Vials (serum finish)
- ⚠️ Do not use Snap Caps on Crimp Top Vials
