There are two common powder actuated fasteners: drive pins and threaded studs.

1.Drive Pin - A drive pin is a special nail-like fastener1.designed to permanently attach one material toanother, such as wood to concrete or wood to steel.Head diameters vary in size from 1/4" to 3/8".However, for additional head bearing in conjunctionwith soft materials, washers, of larger diameters areeither fastened through or made part of the drivepin assembly.

Common Drive pin

2.Threaded Stud A threaded stud is a fastener comprised of a shank portion which is driven into the2.base material (and is therefore not visible after fastening) and a threaded portion (which remainsvisible after the fastening). An object is then attached to the threaded portion with a nut. The mostcommon thread sizes are 1/4-20, and 3/8-16.