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Six zinc yellow hex nuts in a pack

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP 63067 Hex Nut 5/8"-18 Grade 8 Zinc Yellow 6 Pack

SKU CH-YVFC-02STK

Grade 8 steel hex nuts with zinc-yellow finish secure 5/8"-18 bolts in a six-piece pack

  • Product typeNuts
  • Grade 8 steel delivers high tensile strength
  • 5/8"-18 thread fits matching bolts precisely
  • Zinc yellow coating resists corrosion effectively
  • Six-pack quantity covers multiple fastening tasks
  • Trusted MIDWEST FASTENER brand ensures consistent quality

5/8"-18 Grade 8 hex nuts

These six hex nuts are manufactured to Grade 8 strength for high-stress fastening. The coarse 18 threads per inch suit standard 5/8 inch bolts and studs. A zinc yellow finish adds corrosion resistance for automotive and industrial use. The pack supplies a convenient quantity for maintenance or assembly tasks.

Thread specification limits

The 5/8"-18 UNF thread requires a matching bolt or stud with the same diameter and pitch. Grade 8 rating means the nut meets specific tensile and proof-load standards for heavy-duty joints. Mismatched thread pitch or diameter will prevent proper engagement and risk joint failure. Always verify the mating fastener specification before installation.

Six-pack capacity and headroom

The six-piece pack covers typical single-joint requirements or small repair jobs. Larger projects needing multiple connection points will require additional packs. The Grade 8 rating provides headroom for high-clamp-load applications where lower-grade nuts would stretch or strip. Buyers needing bulk quantities or different thread sizes must source separate assortments.

How it compares

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

Price $7.99
Cheaper than about 90% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameMIDWEST FASTENER
Product typeNuts

Questions about this item

What does the 5/8"-18 thread size mean for bolt compatibility?

The 5/8"-18 designation indicates a 5/8 inch diameter with 18 threads per inch, matching bolts or studs with that exact coarse thread pitch for a secure fit.

How does the Grade 8 rating affect performance in a real application?

Grade 8 steel provides high tensile strength, making these nuts suitable for heavy-duty automotive and structural fastening where strong clamping force is required.

What does the zinc yellow finish provide in practice?

The zinc yellow coating offers corrosion resistance, protecting the steel threads from rust and extending service life in exposed or harsh environments.

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