1/4-28 Stainless Steel Fine Threaded Hex Head Cap Screws. 1/4"-28 Stainless Steel Fine Thread Hex Bolts Have a Hexagonal Head Used With a Wrench or a Socket. Fine Threads Won’t Loosen as a Result of the Smaller Thread Include and Off Torque. Fine Pitch Hex Head Cap Bolts are a Primary Fastener Type For Many Thru-Bolting Applications. As a General Hex Cap Screw Rule: Thread Length is: 2X The Diameter Plus 1/2". Made of 18-8 / 304 Grade Stainless Steel Which is an Austenitic Grade of Stainless Steel. Right Hand Thread, UNF Please View Matching Nuts & Washers Below. CONTACT OUR SALES DEPARTMENT FOR BULK AND WHOLESALE PRICING.