MIDWEST FASTENER CORP
MIDWEST FASTENER CORP Nylon Insert Lock Nut 5/16"-18 Steel Grade 2 Zinc 03650
Nylon insert lock nut with 5/16"-18 thread resists loosening under vibration and torque
- TypeNuts
- Nylon insert resists loosening under vibration and torque
- Steel Grade 2 construction provides reliable strength for fastening
- Zinc coating protects against corrosion in harsh conditions
- 5/16"-18 thread fits standard coarse-thread bolts
- Manufacturer part 03650 ensures correct identification and ordering
5/16"-18 Nylon Insert Lock Nut
This zinc-plated steel Grade 2 nut features a nylon insert that resists loosening caused by vibration and torque. It is suited for automotive, machinery and general fastening tasks where a secure threaded joint is required. The 5/16"-18 thread pitch matches standard coarse-thread bolts and studs.
Check thread size and grade before ordering
Verify that the mating bolt or stud uses a 5/16"-18 thread to ensure proper engagement. Confirm that a Grade 2 fastener meets the strength requirements of the application. Ensure the nylon insert is compatible with the operating temperature range of the assembly.
Fits standard coarse-thread hardware
The nut installs with a standard wrench or socket and requires no special tools. Its nylon insert eliminates the need for separate lock washers or thread-locking compounds in many vibration-prone joints. The zinc finish provides corrosion resistance for indoor and protected outdoor use.
Highlights
- Nylon insert resists loosening under vibration and torque
- Steel Grade 2 construction provides reliable strength for fastening
- Zinc coating protects against corrosion in harsh conditions
- 5/16"-18 thread fits standard coarse-thread bolts
- Manufacturer part 03650 ensures correct identification and ordering
Specifications
| Brand | MIDWEST FASTENER |
|---|---|
| Type | Nuts |
Questions about this item
Does the 5/16"-18 lock nut come in a pack or must I buy each piece separately?
The listing shows a single MIDWEST FASTENER 03650 nylon-insert lock nut; order the quantity you need for the job.
Should I choose the Grade 2 zinc version or a different grade for this thread size?
Grade 2 steel with zinc plating suits general-purpose fastening; select a higher grade only if the application demands greater tensile strength.
How does the nylon insert keep the 5/16"-18 nut from backing off under vibration?
The nylon collar grips the bolt threads when tightened, creating prevailing torque that resists loosening from shock or cyclic loading.
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