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Hex nut, steel, black oxide finish, 1 15/32 in hex width, 55/64 in height

Zoro Select

Zoro Select Hex Nut 1"-8 Steel Grade 8 Black Oxide 55/64

SKU CH-PMBQ-X7GZ5

Grade 8 steel hex nut with black oxide finish, 1"-8 thread and 55/64 in height

  • TypeNuts
  • Grade 8 steel delivers high tensile strength
  • ASME B 18.2.2 and SAE J995 ensure dimensional accuracy
  • 55/64 in hex height fits standard 1"-8 threads
  • Black oxide finish resists corrosion
  • Made in North America to strict quality standards

Hex Nut 1"-8 Grade 8

This Zoro Select hex nut is a Grade 8 steel fastener with a black oxide finish. It suits applications that require high-strength inch-series hardware in a standard hex profile. The right-hand thread matches common 1"-8 bolts and studs.

Installation and common issues

The nut installs with a 1 15/32 inch wrench or socket. Its 55/64 inch height provides full thread engagement for the specified diameter. Over-torquing can strip the coarse threads, and the black oxide coating offers limited corrosion resistance in wet environments.

Compatibility checks

Verify that the mating bolt is a 1"-8 thread and that the joint design calls for a Grade 8 nut. The fastener meets ASME B18.2.2 and SAE J995 standards for dimensional and material quality. California Proposition 65 warnings apply to this product.

Highlights

  • Grade 8 steel delivers high tensile strength
  • ASME B 18.2.2 and SAE J995 ensure dimensional accuracy
  • 55/64 in hex height fits standard 1"-8 threads
  • Black oxide finish resists corrosion
  • Made in North America to strict quality standards

Specifications

BrandZORO SELECT
TypeNuts

Questions about this item

How can I confirm the nut is tightened correctly after installation?

Verify the nut sits flush on the threads with no visible gap and that the 55/64 in height matches the specified dimension.

What comes in the package and what must I source separately?

The pack contains the Grade 8 steel hex nuts with black oxide finish; mating bolts, washers and any thread-locking compound are not included.

Which pack size should I select for a small repair job?

Choose the Small Pack option listed for this 1"-8 thread size.

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