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Three rubber well nuts with flanged bushings and embedded nuts

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP 64554 Well Nut 3/8"-16 1 in Rubber 3 Pack

SKU CH-K9VQ-2HWGV

Rubber well nuts with 3/8"-16 threads seal bolt holes while fastening blind joints in a three-pack

  • Product typeRivets
  • Blind-install fastener seals bolt holes
  • Flanged neoprene bushing absorbs vibration
  • Embedded nut allows single-sided assembly
  • Rubber construction resists corrosion and weathering
  • Three-pack supplies multiple mounting points

Well nut 3/8"-16 for blind fastening

This three-pack supplies rubber well nuts with a 3/8"-16 thread and a one-inch body length. They are designed for blind installation where only one side of the joint is accessible. The flanged neoprene bushing seals the bolt hole while the embedded nut provides the threaded engagement. Suitable for automotive, marine and general hardware tasks that need a watertight fastening point.

Simple press-in installation

Push the well nut into the pre-drilled hole until the flange seats flush, then run the bolt from the flanged side to expand the rubber body. No special tools are required beyond the mating bolt and a wrench. The main failure mode is over-tightening, which can pull the embedded nut through the neoprene or split the bushing. Stop tightening once the joint feels snug and the seal is made.

3/8"-16 thread size decides fit

The single specification that determines compatibility is the 3/8"-16 thread pitch; the bolt you use must match it exactly. If your application requires a different thread diameter or pitch, these well nuts will not work. The one-inch body length and rubber construction are fixed, so verify hole depth and material compatibility before purchase.

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 typeRivets

Questions about this item

How do I confirm the well nut is sealing and fastening properly after installation?

Tighten the bolt until the rubber bushing expands and the flange seats firmly against the surface, creating a sealed, blind fastening.

What comes in the pack and what extra items are needed for installation?

The pack contains three rubber well nuts with 3/8"-16 threads; you must supply the matching bolts and any washers separately.

Which thread size and length version should I choose for my application?

This model is the 3/8"-16 thread by 1 inch length variant; select it when your hole and material thickness match those dimensions.

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