3/8-16 x 2 1/4 Alloy Steel Button Head Socket Cap Screw is used where a rounded, lower-profile head helps keep exposed hardware compact without requiring countersinking. The alloy steel construction is used in machinery repair where a rounded head and socket-drive access help keep service work straightforward.

Typical applications include equipment housings and assembly fixtures where the button head presents a clean bearing surface on visible hardware. It also supports material-handling systems and commercial equipment when the lower rounded profile helps limit snag points. The button-head form is specified when the fastener head remains visible or accessible and a smooth rounded profile is preferred.

When checking fit for the 3/8-16 thread and 2 1/4 in. length, the reference head diameter is 0.636-0.656 in. and the head height is 0.185-0.199 in. The nominal body diameter and hex-key information below support counterbore planning, socket access, and replacement matching.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 3/8-16
• Length: 2 1/4 in.
• Nominal Body Diameter: 3/8 (.375 in.)
• Head Diameter: 0.636-0.656 in.
• Head Height: 0.185-0.199 in.
• Hex-Key Size: 7/32 in.
• Drive Type: Internal Hex

Reference dimensions may vary slightly by manufacturer.

Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.