The phrase "a snap cap" is correct and usable in written English.
It can be used to refer to a type of bottle cap that snaps onto the bottle, often used for beverages or other containers.
Example: "Make sure to securely fasten a snap cap on the bottle to prevent any spills."
Alternatives: "snap-on cap" or "snap closure".
You can easily test this using a snap cap http://en.wikipedia.org/wiki/Snap_cap.org/wiki/Snap_cap
Have a friend load your gun for you, but replacing one loaded round with a snap cap of the same caliber, positioned in the magazine (for a pistol) or cylinder (for a revolver) at random.
As stated in the link, "A snap cap is a device which appears similar to a standard firearm cartridge but contains no primer or projectile and is used to dry fire the weapon.
This gas will pop the top of a snap-cap bottle and the resulting release of fluid will bleach the inside of your instrument case and cause the lining to deteriorate very rapidly.
The disrupted cell suspension was centrifuged for 5 min at high speed (Eppendorf, 5415D) and the supernatant was transferred to a 2 ml snap cap tube containing heavy phase lock gel (5 Prime, Fisher Scientific Co .. 300 µl chloroform was added to each tube, vortexed at high speed for 15 sec, inverted vigorously for 2 mins and centrifuged for 10 min at maximum speed (Eppendorf 5415D).
Electron Microscopy 150 μl of midbody suspension was pipetted into 1 ml of 25 mM lysine and 1.5% gluteraldehyde fix in BRB80 in a 5 ml snap cap tube and gently mixed by inverting.
150 μl of midbody suspension was pipetted into 1 ml of 25 mM lysine and 1.5% gluteraldehyde fix in BRB80 in a 5 ml snap cap tube and gently mixed by inverting.
After an overnight incubation (4°C), the nickel beads were transferred to a spin column (Snap Cap, Pierce) and washed three times with WBI (50 mM Tris-HCl [pH 7.8], 300 mM NaCl, 0.1% NP-40, 10 mM imidazole, 5 mM β-mercaptoethanol, 6.0 M guanidine-HCl) then three times with 1xPNK (50 mM Tris-HCl [pH 7.8], 10 mM MgCl2, 0.5% NP-40, 5 mM β-mercaptoethanol).
Ticks were transferred from flags, CO2-baited traps, and domestic animals into 16 mL glass Wheaton snap cap vials (Fisher Scientific, Pittsburg, PA) with a solid plaster of Paris/charcoal base.
Fractions for the different measurements were weighted into snap cap vials and stored in the fridge until measurement.
Whole larvae were immersed in 95% ethanol in individual snap cap tubes, and genomic DNA was extracted as described by Tibbets and Dowling (1996).
