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Hexagonal steel coupling nut, zinc plated, 1-3/4 inch length

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP Coupling Nut 5/16"-18 Steel Zinc 1-3/4 in 3492

SKU CH-NN38-CHC08

Connects two 5/16"-18 threaded rods end-to-end with a 1-3/4 inch steel zinc-plated coupling nut

  • Product typeNuts
  • Connects threaded rods end-to-end
  • 5/16"-18 thread fits matching rods
  • Steel construction provides structural strength
  • Zinc plating resists corrosion in damp conditions
  • 1-3/4 in length spans the joint

Coupling Nut 5/16"-18

This coupling nut joins two threaded rods end to end using internal threads tapped from both sides to meet in the centre. It suits maintenance, fabrication and automotive tasks where a secure inline connection is required. The steel body with zinc plating resists corrosion in workshop and outdoor environments.

Thread specification 5/16"-18

The nut accepts standard 5/16"-18 coarse threads on each end. Matching this exact pitch and diameter is the single detail that determines whether the part fits your rods. Verify the rod threading before purchase to avoid mismatched connections.

Length 1-3/4 in engagement

At 1-3/4 inches long the nut provides ample thread engagement for a strong joint in typical structural or repair assemblies. It handles standard load paths for this thread size but is not intended for critical high-stress structural connections requiring certified fasteners.

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

What does the 5/16"-18 thread size mean when I install this coupling nut?

The 5/16"-18 thread size means this nut fits rods or bolts with a 5/16 inch diameter and 18 threads per inch, allowing two such rods to be joined end to end.

How does the zinc-plated steel construction affect the coupling nut in use?

The zinc-plated steel provides corrosion resistance and strength for connecting threaded rods in indoor or mild outdoor environments.

What length of threaded engagement does the 1-3/4 inch body provide?

The 1-3/4 inch overall length allows each rod to thread roughly half that distance into the nut, meeting in the middle for a secure connection.

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