4-40 x 1/2 Brass Flat Head Socket Cap Screw is commonly specified when a brass socket-drive screw needs to seat into a flat-head countersink rather than stand proud of the surface.

When the countersink is prepared correctly, the flat head can sit flush with or close to the surrounding surface to reduce snag points and improve clearance. This makes the product useful for access covers, equipment panels, and interior equipment, especially where raised hardware could interfere with adjacent components.

Cold Headers has supplied specialty industrial socket fasteners since 1962 and supports buyers looking for exact brass socket screw sizes. Brass may be specified for nonferrous construction, electrical conductivity, distinctive appearance, and general resistance to ordinary atmospheric corrosion. For this 4-40 thread and 1/2 in. length, review the body diameter, head diameter, head height, hex socket size, and key engagement before approving the fastener for a countersunk assembly.

Technical Highlights

• Material: Brass
• Thread Size: 4-40
• Length: 1/2 in.
• Nominal Body Diameter: 0.112 in.
• Head Diameter: 0.218-0.255 in.
• Head Height: 0.083 in.
• Hex Socket Size: 1/16 in.
• Drive Type: Internal Hex
• Minimum Key Engagement: 0.055 in.

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