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Twenty-five black-oxide alloy-steel flat-head socket cap screws in a pack

Kerr Lakeside

Kerr Lakeside Socket Cap Screw 3/4-10x2 1/2 Pk25

SKU CH-K6XT-75T43

Alloy-steel flat-head socket cap screws, 3/4-10 UNC thread, 2 1/2 inch length, black-oxide finish, pack of 25

  • High tensile strength for demanding loads
  • Black oxide finish resists corrosion
  • Fully threaded design ensures full engagement
  • Hex socket drive allows high torque
  • Pack of 25 covers multiple jobs

Socket Cap Screw 3/4-10x2 1/2

Kerr Lakeside supplies these alloy steel flat head cap screws in a pack of 25. The UNC 3A right-hand thread runs the full 2 1/2 inch length under the head. A 1/2 inch hex socket drive fits standard bits for installation in structural or machine assemblies.

Sustained Load Performance

Minimum tensile strength is rated at 135,000 psi for diameters over 1/2 inch. Rockwell hardness falls between RC 38 and 43. The black oxide finish adds mild corrosion resistance while the Class 3A thread tolerance maintains clamping force under continuous vibration.

Compatibility Check

Verify that the mating thread is 3/4-10 UNC and that the 1.438 inch head diameter clears the counterbore. Confirm the 0.396 inch head height suits the available stack height. Ensure the 1/2 inch hex drive can be accessed with the tool clearance on site.

How it compares

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

Price $62.99
Pricier than about 73% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameKerr Lakeside

Questions about this item

Does the 3/4-10 UNC thread generate noticeable vibration or heat during extended pneumatic tool use?

These alloy-steel socket cap screws are fully threaded fasteners with a Rockwell hardness of RC 38-43 and a minimum tensile strength of 180,000 PSI; they do not produce vibration or heat themselves.

What drive tool is required to install the 1/2-inch hex socket drive on these screws?

A 1/2-inch hex key or compatible hex bit is needed to engage the internal hex socket drive on each screw.

Will the 1.438-inch head diameter and 0.396-inch head height clear countersunk holes in older ASTM A574-rated fixtures?

The flat head measures 1.438 inches in diameter and 0.396 inches in height, meeting ASTM A574 and ANSI B18.3 Class 3A dimensions for direct replacement in existing countersunk holes.

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