MIDWEST FASTENER CORP
MIDWEST FASTENER CORP 03656 Nylon Insert Lock Nut 3/4"-10 Steel Grade 2 Zinc
Nylon-insert lock nut resists loosening under vibration and torque with a zinc-plated steel Grade 2 body
- TypeNuts
- Nylon insert resists loosening under vibration
- 3/4"-10 thread fits compatible bolts
- Steel Grade 2 construction provides standard strength
- Zinc coating protects against corrosion
- Manufacturer part number 03656 for identification
What this lock nut is for
This MIDWEST FASTENER nylon insert lock nut resists loosening under vibration and torque. It is sized for 3/4"-10 threads and made from Grade 2 steel with a zinc finish. Mechanics and builders use it where a standard nut might back off over time.
Practical limits of the nylon insert
The nylon collar provides prevailing torque that holds against vibration but softens with sustained high heat. It is not intended for repeated removal and reinstallation because the insert wears. Grade 2 strength suits general fastening, not critical structural joints.
What it replaces and when to upgrade
This nut replaces a plain hex nut in any 3/4"-10 location where loosening has been a problem. The jump is worth it on machinery, trailer hardware or suspension points that see constant movement. It does not serve applications requiring high-strength alloy grades or all-metal locking styles.
Highlights
- Nylon insert resists loosening under vibration
- 3/4"-10 thread fits compatible bolts
- Steel Grade 2 construction provides standard strength
- Zinc coating protects against corrosion
- Manufacturer part number 03656 for identification
Specifications
| Brand | MIDWEST FASTENER |
|---|---|
| Type | Nuts |
Questions about this item
Should I choose the Grade 2 or a higher grade for my application?
Grade 2 steel suits general-purpose fastening where moderate strength is sufficient; select a higher grade only if the joint specification demands greater proof load.
How does the 3/4"-10 thread perform once installed in a vibrating assembly?
The nylon insert grips the bolt threads, creating prevailing torque that resists loosening from vibration and thermal cycling.
What does the zinc coating protect against in practice?
Zinc provides sacrificial corrosion resistance, delaying rust on the steel substrate in typical indoor or mildly exposed environments.
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