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Hexagonal steel coupling nut with zinc plated finish

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP 64506 Coupling Nut 3/8"-16 Steel Grade 2 Zinc Plated

SKU CH-CKKN-YWPZD

Connects two threaded rods end to end with a 3/8"-16 steel Grade 2 zinc-plated coupling nut

  • Product typeNuts
  • Connects two threaded rods end-to-end
  • 3/8"-16 thread fits matching rods
  • Steel Grade 2 provides structural strength
  • Zinc plated finish resists corrosion
  • New condition ready for immediate use

Coupling Nut 3/8"-16

This steel coupling nut joins two threaded rods end to end using internal threads that meet in the centre. It is suited for maintenance, fabrication and automotive tasks where a straight rod extension is required.

Replaces shorter spacers or improvised sleeves

When a project demands a longer reach than a standard hex nut provides, this coupling nut bridges the gap without welding. The upgrade is worth it whenever alignment and thread engagement must stay consistent across the joint.

Installs by hand or with a wrench on the external

No special tools are needed beyond a correctly sized spanner. The most common issue is cross-threading if the rods are not started squarely, so align both sides before applying torque.

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 nameMIDWEST FASTENER
Product typeNuts

Questions about this item

What thread size does the 64506 coupling nut accept?

The 64506 coupling nut is tapped for 3/8"-16 threads on both ends, allowing two threaded rods of that size to meet in the middle.

How do you install the coupling nut without cross-threading the rods?

Start each rod by hand into its respective end, turning slowly until the threads engage fully before applying a wrench to tighten.

When should the zinc-plated steel coupling nut be replaced?

Replace it if the zinc coating shows white corrosion, the threads feel rough, or the nut stretches under load.

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