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1/4-20 Grade 5 Flange Nylon Insert Lock Nut - Plated
SKU: FNLN1420
$0.119each -
5/16-18 Grade 5 Flange Nylon Insert Lock Nut - Plated
SKU: FNLN51618
$0.126each
Flange Nylon Insert Lock Nuts
Flange Nylon Insert Lock Nuts
Flange nylon insert lock nuts combine three parts in one: a Grade 5 hex nut, a built-in washer flange and a nylon locking ring. The flange spreads the load over the surface, and the nylon insert grips the bolt threads to resist vibration. Unlike serrated flange nuts, they won't scratch the surface.

Specifications
- Strength: Grade 5
- Finish: zinc plated
- Sizes: 1/4"-20, 5/16"-18, 3/8"-16 (coarse thread)
Common Uses
- Painted or finished panels
- Equipment, trailers and enclosures
- Slotted or oversized holes where a washer would otherwise be needed
FAQ
Do I need a washer?
No. The flange does the job of a washer.
Can these be reused?
A few times. The nylon grip weakens with each reuse, so replace them on critical joints.
Related: Nylon Insert Lock Nuts | Serrated Flange Lock Nuts
Free shipping on orders over $100, and orders placed before noon EST ship the same day. Purchase orders are accepted from government agencies, schools, hospitals, municipalities and companies with established credit with The Nutty Company, Inc.