1/2-20 x 3 1/2 Alloy Steel Flat Head Socket Cap Screw supports flush-mounted fastening in equipment where raised hardware could interfere with covers or moving parts. Its 82-degree countersunk head is useful when designers want a minimal surface profile while retaining internal hex access for installation and service work.

The design is well suited to inspection fixtures, machine frames, material-handling equipment, and repair work that calls for a countersunk internal-hex screw. Alloy steel construction is appropriate for mechanical fastening applications where the drawing or bill of materials calls for an alloy socket screw. The internal hex drive supports top-side socket engagement where side access is limited.

For this 1/2-20 thread and 3 1/2 in. length, the verified head data helps engineers compare countersink depth, head clearance, and tooling access. Cold Headers supports exact-size sourcing for specialty socket products and uncommon lengths used in industrial maintenance and production work.

Technical Highlights

• Material: Alloy Steel
• Thread Size: 1/2-20
• Length: 3 1/2 in.
• Nominal Body Diameter (B): 0.500 in.
• Head Diameter (A): 0.872-0.938 in.
• Head Height: 0.251 in.
• Hex Socket Size (J): 5/16 in.
• Minimum Key Engagement (T): 0.172 in.
• Drive Type: Internal Hex

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