MIDWEST FASTENER CORP
MIDWEST FASTENER CORP 53668 Nylon Insert Lock Nut M12-1.75 Steel Class 8 Zinc
M12-1.75 nylon insert lock nut resists loosening under vibration and torque
- TypeNuts
- M12-1.75 thread fits metric applications
- Class 8 steel handles high-stress loads
- Zinc finish resists corrosion in harsh environments
- Nylon insert prevents loosening under vibration
- 53668 part number ensures exact reorder match
Product identity
This is a steel lock nut with a nylon insert, thread size M12-1.75 and strength Class 8. It is supplied by Midwest Fastener Corp under part number 53668 and comes with a zinc finish.
Fit and alternatives
The nut suits assemblies that need vibration-resistant fastening on M12 threads. Buyers who require a different thread pitch, a higher strength class or a non-metallic locking element should look at other fastener types.
Capacity and headroom
The nylon insert provides prevailing torque that resists loosening under vibration and torque loads. The Class 8 rating defines the proof load limit for the M12-1.75 thread; beyond that limit the fastener can yield or the insert can overheat.
Highlights
- M12-1.75 thread fits metric applications
- Class 8 steel handles high-stress loads
- Zinc finish resists corrosion in harsh environments
- Nylon insert prevents loosening under vibration
- 53668 part number ensures exact reorder match
Specifications
| Brand | MIDWEST FASTENER |
|---|---|
| Type | Nuts |
Questions about this item
What thread size bolt do I need to use with the M12-1.75 nylon insert lock nut?
You need a bolt or stud with an M12 diameter and 1.75 mm thread pitch to match this nut.
Will the Class 8 zinc-plated steel nut hold up against a Grade 8 bolt I already have?
Yes, the Class 8 rating pairs correctly with a Grade 8 bolt for comparable strength.
How can I confirm the nylon insert is gripping properly after I tighten the nut?
You should feel increasing resistance during the last few turns and the nut should not spin freely by hand once seated.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
