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Ten zinc yellow steel hex nuts 5/8 inch 18 thread grade 8

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP 03736 Hex Nut 5/8"-18 Steel Grade 8 Zinc Yellow 10 PK

SKU CH-PVAY-9HQ9M

Pack of ten grade-8 steel hex nuts with 5/8"-18 threads and zinc yellow finish

  • Product typeNuts
  • Grade 8 steel delivers high tensile strength for demanding fastening jobs
  • 5/8"-18 thread pitch matches compatible bolts and machine screws precisely
  • Zinc yellow coating resists corrosion in automotive and outdoor environments
  • Ten nuts per pack supply enough hardware for multiple assemblies
  • Hex design allows secure tightening with standard wrenches or sockets

Hex Nut 5/8"-18 Grade 8 Zinc Yellow 10 Pack

These zinc-yellow finished hex nuts secure 5/8"-18 threaded bolts and machine screws in automotive and general hardware tasks. The Grade 8 steel construction provides high tensile strength for demanding fastening jobs. Each pack contains ten pieces for multiple installations.

Ten-piece pack simplifies bulk fastening

The ten-count package lets technicians and DIY users complete several joints without opening multiple boxes. Zinc yellow coating adds corrosion resistance compared with plain steel nuts. Grade 8 rating means the nuts withstand higher clamping loads than lower-grade alternatives.

Coarse 18 threads per inch limit fine adjustment

The 5/8"-18 thread pitch is a coarse series, so it advances quickly but offers less precise tension control than fine-pitch fasteners. Zinc yellow finish can wear under extreme vibration or chemical exposure, requiring periodic inspection. Grade 8 hardness may damage softer mating threads if over-torqued.

How it compares

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

Price $11.99
Cheaper than about 68% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameMIDWEST FASTENER
Product typeNuts

Questions about this item

Will the Grade 8 steel threads on these 5/8"-18 hex nuts need periodic replacement under normal tightening cycles?

Grade 8 steel resists thread deformation during repeated installation and removal, so the nuts typically remain serviceable unless the threads are visibly damaged or corroded.

What is the first limit reached when these zinc-yellow finished nuts are torqued repeatedly in a high-vibration joint?

The clamp load of the Grade 8 fastener is the limiting factor; once the joint relaxes beyond the proof load of the 5/8"-18 threads, the connection can loosen.

Does the zinc yellow coating on the 10-pack of 5/8"-18 nuts change friction or heat dissipation during all-day assembly work?

The zinc yellow finish provides consistent torque-tension behaviour and does not generate measurable heat during hand or impact tightening.

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