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Box of 25 black oxide alloy steel socket head cap screws 3/4-10 x 1.75 in

Kerr Lakeside

Kerr Lakeside 75C175KCS 3/4-10 x 1.75 in. Socket Head Cap Screw Alloy Steel Black Oxide 25 Pack

SKU CH-CDQE-XMGAY

Alloy steel socket head cap screws with black oxide finish, 3/4-10 UNC coarse thread, 1.75 in. length, Rc 38-43 hardness, 170,000 lbs tensile strength, 25-piece pack

  • TypeSocket
  • High-strength fastening with 170,000 lbs tensile rating
  • Hardened alloy steel rated RC 38-43 for durability
  • Black oxide finish resists corrosion in harsh environments
  • Precision hex drive prevents stripping under high torque
  • 25-piece pack supplies volume for production or maintenance

3/4-10 Socket Head Cap Screws

This 25-piece pack supplies 3/4-10 UNC socket head cap screws in alloy steel with a black oxide finish. Each fastener measures 1.75 in. long with full thread engagement. The hex drive design allows installation in confined spaces where external wrench clearance is limited. Mechanics and fabricators handling heavy-duty assemblies will find the coarse thread pitch suited to rapid assembly.

Sustained clamping performance

Heat-treated alloy steel delivers a Rockwell hardness of Rc 38-43 and meets ASTM A574 and ANSI B18.3 requirements. Minimum tensile strength is rated at 180000 psi with a tested tensile load of 170000 lbs. The black oxide coating provides mild corrosion resistance and reduces galling during repeated tightening cycles. Full-thread geometry distributes load evenly along the entire shank under continuous vibration.

Pre-installation checks

Verify that the mating component provides a tapped 3/4-10 UNC hole with sufficient depth for the 1.75 in. thread length. Confirm the hex key size matches the socket drive to prevent rounding under high torque. Ensure the alloy steel material is compatible with the joined metals to avoid galvanic corrosion. The 8.64 lb pack weight reflects 25 pieces; plan handling accordingly.

Highlights

  • High-strength fastening with 170,000 lbs tensile rating
  • Hardened alloy steel rated RC 38-43 for durability
  • Black oxide finish resists corrosion in harsh environments
  • Precision hex drive prevents stripping under high torque
  • 25-piece pack supplies volume for production or maintenance

Specifications

BrandKerr Lakeside
TypeSocket

Questions about this item

How much torque can the 3/4-10 UNC threads handle before yielding?

The alloy steel screws meet ASTM A574 with a minimum tensile strength of 180,000 psi and a rated tensile load of 170,000 lbs, so the coarse threads will hold that full clamp load.

What drive tool is needed for the hex socket head?

A 5/8 in. hex key or 5/8 in. hex bit socket fits the internal drive on these 3/4 in. diameter cap screws.

Will the black oxide finish gall against older zinc-plated hardware?

Black oxide adds only light corrosion resistance and lubricity; it will not gall against zinc plating, but use anti-seize if dissimilar metals will see moisture.

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