For drawings calling out 4-40 x 1 1/8, this 18-8 stainless hex head fastener supports assemblies where top-drive clearance is not required. In this size range it is treated as a hex head machine screw, with the hex head driven by external tooling rather than an internal socket.
Common application reviews include conveyors, material-handling equipment, and frame connections. External hex drive is useful when a wrench or socket can reach the head from the side and a counterbore would add unnecessary machining.
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' catalog work is strongest where the requested size, material, and application details need a careful match.
Technical Highlights
- Material: 18-8 Stainless Steel
- Thread Size: 4-40
- Length: 1 1/8 in.
- Head Style: Hex
- Drive: External Hex (wrench or socket driven)
- Width Across Flats: 1.631-1.688 in.
- Head Height: 0.658-0.718 in.
Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.
