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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

  • Product 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.

How it compares

Measured against everything we stock in General Hardware & Accessories, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 85% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameZORO SELECT
Product 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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