Specify 5/8-11 x 3/8 18-8 Stainless Steel Hex Head Cap Screw when thread, length, material, and external hex drive must match an existing bill of materials. In this size range it is treated as a hex head cap screw, with the hex head driven by external tooling rather than an internal socket.
Common application reviews include maintenance replacement work, field repairs, and production equipment. When the design calls for a recessed counterbored fastener or tighter tool clearance, compare 18-8 Socket Head Cap Screws.
18-8 stainless steel is an 18% chromium and 8% nickel austenitic stainless material used for ordinary atmosphere, moisture exposure, washdown, and clean appearance. Cold Headers has supplied specialty fasteners since 1962 and supports exact-size sourcing for hard-to-find industrial hardware.
Technical Highlights
- Material: 18-8 Stainless Steel
- Thread Size: 5/8-11
- Length: 3/8 in.
- Head Style: Hex
- Drive: External Hex (wrench or socket driven)
- Width Across Flats: 0.551-0.562 in.
- Wrench Size: 9/16 in.
- Head Height: 0.226-0.243 in.
- Dimensional Standard: ASME B18.2.1
- Material Standard: ASTM F593
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
