MIDWEST FASTENER CORP
MIDWEST FASTENER CORP 71921 1/16" Black Phosphate Steel Pushnut Washers 50PK
Pack of 50 pushnut washers with inward-facing flanges that grip without threads
- TypeNuts
- Secure grip without threads thanks to inward-facing flange teeth
- Quick push-on or light-tap installation saves assembly time
- Black phosphate coating protects steel from corrosion
- 50-piece pack covers multiple repair or build jobs
- Permanent hold requires cutting for removal ensuring tamper resistance
Secure 1/16" Shaft Fastening
These black phosphate steel pushnut washers grip a 1/16" diameter shaft using inward-facing flanges instead of threads. They are designed for applications where a permanent, vibration-resistant hold is needed without tapping holes. The pack contains 50 pieces for production or repair work. Install by pushing or lightly tapping onto the shaft.
Flanged Grip Eliminates Threading
The flanged design acts as teeth that bite into the shaft surface, creating a secure hold that resists loosening from vibration. This removes the need for threaded shafts, nuts or separate locking washers, simplifying assembly on unthreaded rods or studs. The black phosphate coating provides a base level of corrosion resistance for indoor or protected environments.
Removal Requires Cutting The Washer
Because the flanges deform to lock in place, the washer cannot be unscrewed or pried off without damaging the shaft; it must be cut away for removal. Verify your shaft diameter is exactly 1/16" before ordering, as the grip depends on precise interference fit. Ensure the application can accept a permanent fastener that cannot be adjusted or reused.
Highlights
- Secure grip without threads thanks to inward-facing flange teeth
- Quick push-on or light-tap installation saves assembly time
- Black phosphate coating protects steel from corrosion
- 50-piece pack covers multiple repair or build jobs
- Permanent hold requires cutting for removal ensuring tamper resistance
Specifications
| Brand | MIDWEST FASTENER |
|---|---|
| Type | Nuts |
Questions about this item
Do the pushnut washers need periodic re-tightening or replacement once installed?
Pushnuts are designed for permanent retention; the inward-facing flanges lock onto the shaft and do not loosen, so no re-tightening is needed. Removal requires cutting the washer off, after which a new one must be used.
What limits how many times I can reuse a washer from the 50-pack?
Each washer is single-use because the flanges deform during installation; cutting is required for removal, so every reuse consumes a fresh piece from the pack.
Do the steel washers generate heat or noise when left under constant load all day?
They are passive metal fasteners with no moving parts or electrical function, so they produce no heat, noise or power draw under sustained load.
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