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Small black alloy button-head screw with a shallow domed top and a tiny hex socket in the centre

Kerr Lakeside

Kerr Lakeside #8-32 socket head cap screw, button, black oxide alloy, 5/8 in

SKU CH-TEDP-4JKZJ

#8-32 button socket cap screw in Grade 8 alloy steel with black oxide finish, 5/8 inch fully threaded length, 3/32 inch hex drive, ANSI B18.3 standard

  • Grade 8 alloy steel delivers high tensile strength for demanding fastening tasks
  • Black oxide finish provides corrosion resistance and a low-reflectivity surface
  • Button head design allows smooth clearance in countersunk or tight assemblies
  • 3/32 in hex socket drive ensures secure tool engagement during installation
  • ANSI B18.3 dimensional standard guarantees consistent fit and interchangeability

Button Socket Cap Screw

The Kerr Lakeside #8-32 button socket head cap screw is a Grade 8 alloy steel fastener with a black oxide finish. It uses a 3/32 inch socket drive and features a fully threaded 5/8 inch length. The low-profile button head measures .078 inch in height and .312 inch in diameter, suited for applications requiring a smooth, rounded top surface.

ANSI B 18.3 Dimensional Standard

This fastener conforms to the ANSI B 18.3 dimensional standard for socket head cap screws. The inch-based thread system and specific head geometry ensure compatibility with matching tapped holes and drive tools. The black oxide coating provides mild corrosion resistance and reduced light reflection without altering the critical thread or head dimensions defined by the standard.

Grade 8 Alloy Steel Upgrade

Replacing Grade 5 or ungraded hardware with this Grade 8 alloy screw increases tensile strength and shear resistance for critical joints. The jump is worth it when the assembly experiences high clamping loads, vibration, or stress where lower-grade fasteners risk stretching or failure. It is not for applications requiring a countersunk head, flange bearing surface, or metric thread dimensions.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 91% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameKERR LAKESIDE

Questions about this item

Should I choose the Grade 8 black oxide alloy version or a different grade for high-stress fastening?

The Grade 8 alloy steel with black oxide finish provides high tensile strength for demanding applications, while the fully threaded #8-32 design ensures full engagement across the 5/8 in length.

What does the 5/8 inch fastener length mean for actual thread engagement in my assembly?

The 5/8 in fastener length is fully threaded, so the entire length is available for engagement; the 3/32 in socket drive and 0.312 in head diameter determine tool clearance and bearing surface.

Does the ANSI B 18.3 standard and 3/32 inch socket drive limit the torque I can apply?

The ANSI B 18.3 dimensional standard and 3/32 in socket drive size define the head geometry and tool interface; torque capacity is governed by the Grade 8 alloy steel material properties.

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