These Grade 8 cap screws are recommended for high stress bolting applications and are the among the strongest grade of fastener available in steel. The grade 8 bolt is compatible with grade 8 nuts and washers of the same thread pitch and diameter. An alternative for using them without nuts is to install them directly into a compatible female threaded hole. 1-piece per pack Steel construction Yellow zinc-plated 1/2 in.-13 tpi x 6 in. Grade-8 Features Item Weight 0.35 ACQ Rated Fastener No Fastener Length 6 in Fastener/Connector Material Steel Material Steel Measurement Standard SAE Drive Style Hex Product Weight (lb.) 0.35 Returnable 180-Day Fastener Thread Type Coarse Fastener Type Specialty Fastener Package Quantity 1 Head diameter (in.) .5 Assembled Depth (in.) 6.00 in Fastener Length (in.) 6 Assembled Width (in.) 0.50 in Assembled Height (in.) 0.50 in Manufacturer Warranty None