MIDWEST FASTENER CORP
MIDWEST FASTENER CORP 08207 Nylon Insert Lock Nut 3/8"-16 Steel Grade 8 Yellow
A 3/8"-16 Grade 8 steel lock nut with a nylon insert that resists loosening under vibration and torque
- TypeNuts
- Resists vibration loosening with nylon insert
- Grade 8 steel handles high-stress loads
- Yellow finish adds corrosion protection
- 3/8"-16 thread fits standard hardware
- Model 8207 ensures correct replacement part
Product Identity
The Midwest Fastener 08207 is a nylon insert lock nut built from Grade 8 steel with a yellow finish. It uses a 3/8"-16 thread and is supplied new for general hardware applications.
Ideal Users and Limits
This nut suits anyone needing a vibration-resistant fastener that will not loosen under torque. It is not for buyers who require a different thread pitch, a non-locking hex nut, or a stainless steel option for corrosion resistance.
Build Integration
The nylon insert grips the mating threads to prevent back-off without extra washers or adhesives. The Grade 8 rating provides high tensile strength for structural joints, freeing the installer from secondary locking methods.
Highlights
- Resists vibration loosening with nylon insert
- Grade 8 steel handles high-stress loads
- Yellow finish adds corrosion protection
- 3/8"-16 thread fits standard hardware
- Model 8207 ensures correct replacement part
Specifications
| Brand | MIDWEST FASTENER |
|---|---|
| Type | Nuts |
Questions about this item
What bolt diameter and thread pitch does the 3/8"-16 lock nut fit?
The nut is cut for a 3/8 inch diameter bolt with 16 threads per inch, so it matches any Grade 8 bolt of that exact size.
Will the nylon insert stay effective if I reuse the nut on an older Grade 8 bolt?
The nylon collar is designed for a single tightening cycle; reusing it on a used bolt reduces prevailing torque and may not prevent loosening under vibration.
How can I confirm the nut is seated correctly after installation?
Run the nut until the nylon insert fully engages the bolt threads — you will feel a distinct rise in resistance — then torque to the Grade 8 specification for 3/8"-16.
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