MIDWEST FASTENER CORP
MIDWEST FASTENER CORP 31505 Nylon Insert Lock Nut 5/8"-11 Steel Grade 5 Zinc
A nylon-insert lock nut with 5/8"-11 threads, Grade 5 steel and zinc finish resists vibration loosening
- TypeNuts
- Nylon insert resists vibration loosening
- 5/8"-11 thread fits compatible bolts
- Grade 5 steel provides structural strength
- Zinc coating protects against corrosion
- New condition ensures reliable performance
5/8"-11 Grade 5 Lock Nut
This nylon-insert lock nut provides a reusable fastening solution for 5/8"-11 threads. The steel Grade 5 construction delivers reliable tensile strength for structural and mechanical joints. Zinc plating adds a layer of corrosion resistance for general-purpose use. It suits maintenance crews, fabricators and DIY builders securing heavy-duty assemblies.
Nylon insert resists vibration loosening
The captive nylon collar creates prevailing torque that maintains clamp load when equipment vibrates or cycles thermally. Unlike free-spinning nuts, it stays tight without chemical thread-lockers or secondary locking washers. The insert remains effective through multiple removal and reinstallation cycles. This behaviour reduces re-torque intervals on critical connections.
Zinc finish and unified thread fit
The zinc coating protects the steel substrate during storage and in typical indoor or sheltered outdoor environments. Unified 5/8"-11 threads ensure compatibility with standard bolts, studs and threaded rod of the same specification. No specialised tools are required beyond a common wrench or socket. The nut installs quickly in the field or on the bench.
Highlights
- Nylon insert resists vibration loosening
- 5/8"-11 thread fits compatible bolts
- Grade 5 steel provides structural strength
- Zinc coating protects against corrosion
- New condition ensures reliable performance
Specifications
| Brand | MIDWEST FASTENER |
|---|---|
| Type | Nuts |
Questions about this item
Does the nylon insert handle continuous vibration without loosening?
The nylon insert creates prevailing torque that resists loosening under vibration, keeping the joint secure during extended operation.
What thread size must the mating bolt or stud have?
The nut requires a 5/8"-11 thread; the bolt or stud must match this diameter and pitch exactly.
Will the zinc coating protect the nut when used with older steel brackets?
The zinc finish provides corrosion resistance against rust on existing steel brackets in typical indoor or outdoor conditions.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
