Fast Turn Fittings
M4 x .7 x 15mm Rubber Well Nut
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- Return eligible purchases for any reason within the coverage window
- Protection for eligible shipping issues
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M4 x .7 x 15mm Rubber Well Nut
Worry-Free Purchase® by Seel Returnable for any reason and get a full refund
- Return eligible purchases for any reason within the coverage window
- Protection for eligible shipping issues
- Claims and covered refunds handled directly by Seel
Availability, coverage, terms, and the live protection price are shown in your cart.
Shipping calculated at checkout. Delivery timing varies by item and location.
View full return policy
Details
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
Dimensions & sizing
Fits 8mm (5/16") diameter holes; compatible with M4 bolts.

M4 x .7 x 15mm Rubber Well Nut