M4 x .7 x 15mm rubber well nut hardware fastener

Vendor:Fast Turn Fittings

M4 x .7 x 15mm Rubber Well Nut

$0.66

This M4 x .7 x 15mm rubber well nut inserts into an 8mm (5/16") hole and uses an M4 bolt to compress the rubber, securing components in tight or hard-to-reach spaces. It is suited for woodworkers and DIY makers requiring firm fastening where traditional nuts can't fit.

  • Fits 8mm (5/16") diameter holes; compatible with M4 bolts
  • Requires insertion into a specific hole size for installation
  • Recommended torque is 3 lb-IN for proper compression
  • Rubber with metal insert composition
  • Sold individually

Reliable fastening in confined areas

Secure Small Components with M4 Rubber Well Nut

Exact details and fit

Dimensions and Compatibility

Brand or supplier
Fast Turn Fittings Product type: Individual Hardware Material: Rubber with metal insert (specific materials not detailed). Dimensions/options: Fits 8mm (5/16") diameter holes; compatible with M4 bolts.

What arrives

One M4 x .7 x 15mm Rubber Well Nut in the selected option unless a set or kit is clearly listed. Props and styling accessories shown in photos are not included.

Hole and bolt fit

Designed for 8mm (5/16") Holes and M4 Bolts

Insert into an 8mm hole, then screw in an M4 bolt to compress and secure.

Ensure your project includes matching hole size and bolt specs

Best with the surfaces, materials, tool systems, or workflows listed on this page. Do not assume compatibility with every resin, wood, machine, or finish.

Always follow the manufacturer's care, use, and safety guidance.

Shipping and returns overview

Shipping & Returns

Shipping

Shipping rates and estimated delivery times are shown at checkout.

Returns

Return requests are accepted within 30 days of delivery. Contact Resin Society first for damaged, defective, incorrect, or missing items and we will coordinate directly with Fast Turn Fittings.
M4 x .7 x 15mm rubber well nut hardware fastener

Small part, big calm

A quiet cylinder of black rubber that disappears into the work, leaving only a clean face and a sure hold.

Held from within

The hush of a hidden fastener

Compression as craft

In the cramped corners of cabinets, instrument panels, and built-ins, access is scarce and wobble is common. The M4 x .7 x 15mm Rubber Well Nut turns a simple 8mm hole into a steady anchor, compressing to grip from the inside. Tighten an M4 bolt and the flange settles flush, no back-side reach required. Hardware stays quiet; lines stay clean.

Tidy, inward strength

Projects feel different when the fix is invisible. This small well nut lets shelves sit square, panels rest without rattle, and surfaces remain unmarred. Recommended torque of 3 lb-IN keeps the touch light and the hold composed. Pair it with M4 titanium hardware when the build calls for a refined finish.

For the detail-keepers

Makers and woodworkers who need a secure, concealed anchor in tight or blind spaces.

How it finds its place

Drill an 8mm (5/16") hole, insert the well nut, and tighten an M4 bolt to compress it and secure a panel or fixture where the backside is out of reach.
  • Woodworking
  • Resin prep
  • Finishing
  • Shop setup
  • Maker projects
Fast Turn Fittings brand cover

Maker's touch

Fast Turn Fittings - A Practical Maker Resource

Fast Turn Fittings grew from enthusiasts who wanted better, right-fit hardware for their builds. The brand specializes in vehicle-specific titanium kits for 500+ applications and individual fasteners in sizes M4 through M12. Each fastener is made from aerospace-grade titanium or zinc-coated stainless steel, and every kit is hand-verified against its spec sheet before shipping. Fast Turn pairs that materials and fitment focus with fulfillment and warranty practices meant to match the product quality. For makers and builders, these small-format, precision fasteners are the finishing detail that keeps a project looking and performing like the work it was meant to be.
Explore Fast Turn Fittings
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Your order gives back

When you buy from Resin Society, you help plant trees through our reforestation partnership. It is a small way your order supports the materials, homes, and landscapes makers care about.

Getting to know this product

Product FAQs

What hole size do I need for this well nut?
An 8mm (5/16") hole is required.
Which bolt fits the center sleeve?
Your shipping rate and delivery estimate are shown at checkout for your address.
How tight should I make the bolt?
Tighten to a recommended torque of 3 lb-IN.
How long is the well nut body?
It measures 15mm in length.
Can I pair it with titanium fasteners?
Yes. It pairs well with M4 titanium hardware for added durability.