We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Box of 25 zinc-plated steel hex nuts

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP 06829 Hex Nut 5/8"-18 Grade 5 Zinc 25 PK

SKU CH-2NS3-418Z1

Pack of 25 Grade 5 zinc-plated hex nuts with 5/8"-18 threads for securing bolts and machine screws

  • Product typeNuts
  • Grade 5 steel handles high clamping loads
  • Zinc plating resists rust in outdoor use
  • 5/8"-18 fine thread fits matching bolts
  • Pack of 25 covers multiple fastening jobs
  • Ready for automotive and machinery repair

5/8"-18 Grade 5 hex nuts

These zinc-plated steel hex nuts fit 5/8"-18 threaded bolts and machine screws. The pack contains 25 pieces for repetitive fastening tasks. Grade 5 rating suits general-purpose mechanical assembly. The zinc finish provides basic corrosion resistance for indoor or sheltered outdoor use.

Thermals noise and power

No thermal, acoustic or electrical characteristics apply to passive fasteners. The nuts generate no heat, produce no noise and draw no power during installation or service. Performance depends entirely on the bolt material, torque applied and joint design chosen by the installer.

Replaces worn or missing hardware

This pack restores a secure joint when original nuts are lost, stripped or corroded. The jump is worth it when a project needs multiple identical Grade 5 nuts in one purchase. Buyers who need a different thread pitch, a higher grade or stainless steel will not find those options here.

How it compares

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

Price $10.99
Cheaper than about 70% of the 2,607 comparable items (median $18.99).

Specifications

Product
Brand nameMIDWEST FASTENER
Product typeNuts

Questions about this item

How do I install the 5/8"-18 Grade 5 hex nuts onto matching bolts without cross-threading?

Start each nut by hand-turning it clockwise onto the clean bolt threads until it seats fully, then tighten with a wrench; forcing it with a tool from the start is the step that damages the 18 threads per inch.

Will the zinc plating on these 25 hex nuts need replacement or maintenance over time?

The zinc coating protects the Grade 5 steel from corrosion; it is sacrificial and not serviceable, so once the plating wears through in a harsh environment the nut itself must be replaced.

What is the first limit reached when these Grade 5 nuts are under sustained vibration or load?

The proof load of the Grade 5 rating is reached before the threads strip, so the joint will loosen or the bolt will stretch once that stress threshold is exceeded.

More in General Hardware & Accessories

Similar items