M5 x .8 x 20mm Rubber Well Nut by Fast Turn Fittings

Vendor:Fast Turn Fittings

M5 x .8 x 20mm Rubber Well Nut

$0.88

The M5 x .8 x 20mm Rubber Well Nut by Fast Turn Fittings enables secure fastening in tight or hard-to-reach spaces by compressing rubber inside a 9.5mm hole when paired with an M5 bolt. Its black rubber with metal insert fits holes sized 9.5mm (3/8") with a grip range of 7.92mm to 11.43mm, providing a reliable hold where traditional nuts won't fit.

  • Designed for fastening in constrained or thin materials
  • Compresses to create secure holds with standard M5 bolts
  • Fits 9.5mm holes with grip range of 7.92mm to 11.43mm
  • Black finish for discreet hardware applications

Secure fasteners in tight spaces

Why choose this Rubber Well Nut

Exact details and fit

Product specifications

Brand or supplier
Fast Turn Fittings Product type: Individual Hardware Material: Rubber with metal insert compatible with M5 bolts. Dimensions/options: Fits holes sized 9.5mm (3/8") with a grip range of 7.92mm to 11.43mm. Color/finish: Black

What arrives

One M5 x .8 x 20mm 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.

Compatible hole size

Dimensions and grip range

Insert the well nut into a 9.5mm hole, then screw in an M5 bolt to compress the rubber and secure the fastener.

Fits holes sized 9.5mm (3/8") with grip range 7.92mm to 11.43mm

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 & returns info

Shipping and returns

Shipping

Shipping rates and estimated delivery times are shown at checkout.

Returns

Return requests accepted within 30 days of delivery. Contact Resin Society first for damaged, defective, incorrect, or missing items to coordinate with Fast Turn Fittings.
M5 x .8 x 20mm Rubber Well Nut by Fast Turn Fittings

Small part, steady finish

A quiet fix for places hands can’t reach—clean edges, firm hold, nothing showy.

Held from the inside

When space is tight, certainty matters

Slim, sure, unseen

Loose panels and rattling covers steal attention from the room you’re shaping. The M5 x .8 x 20mm Rubber Well Nut settles into a 9.5mm hole and grips from within, bringing calm to cramped cavities and thin walls. With a 7.92–11.43mm grip range and 5 lb-IN torque spec, it turns a tricky corner into a simple turn of a bolt.

A cleaner close

Details like this decide whether a cabinet door sits quiet or a bracket holds without complaint. In studios, kitchens, and workshops, that kind of reliability lets people get back to the real work. Pair it with M5 titanium hardware when the project calls for a unified thread and finish.

For the builder at arm’s length

Designers and makers installing components in thin panels or hard‑to‑reach cavities where a standard nut can’t sit.

How it comes together

Insert into a 9.5mm (3/8") hole and tighten an M5 bolt until the rubber compresses for a secure hold within the stated grip range.
  • Woodworking
  • Resin prep
  • Finishing
  • Shop setup
  • Maker projects
Fast Turn Fittings brand cover

About the maker

Fast Turn Fittings profile

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.

Common questions

FAQs

What size hole is needed?
A 9.5mm (3/8") hole is required.
Which bolt does it work with?
Your shipping rate and delivery estimate are shown at checkout for your address.
What thickness can it grip?
It suits a grip range of 7.92mm to 11.43mm.
How much should I tighten it?
Tighten to 5 lb-IN of torque.
Can I pair it with titanium fasteners?
Yes. It’s noted as a good match with M5 titanium hardware.