Pack of TEN replacement 5x10mm screws that will work with any of Zenit handguards (to mount the B-2/B-2U rails to the B-10U for example, or the B-31/B-19 to the B-30/B-19). 

These screws are compatible with the allen keys supplied with Zenit accessories.

Supplied by Zenit Company.

Pack of Spare Screws (5x10mm, for allen key)