IFI 100/107 Top Locknut, Grade C, Alloy Steel, Zinc/Wax Finish, Coarse Thread, 0.336" Thickness, 1/2" Across Flats, 5/16-18
(Pack of
100)
The Top Locknut Grade C delivers uncompromising reliability when your high-stress applications demand it most. This heat-treated, vibration-resistant locknut maintains its grip through severe conditions that would cause standard nuts to fail, ensuring your critical assemblies stay secure even under extreme vibration and repeated stress cycles. Engineered specifically for Grade 8 applications, it retains its locking torque through a minimum of five reapplications while meeting stringent IFI and ANSI specifications with 150,000 PSI minimum proof strength. Whether you're working on heavy machinery, automotive assemblies, or industrial equipment, this Grade C locknut provides the dependable hold that keeps your work running smoothly and safely.
Heat-treated for matched strength
Will not loosen even under severe vibration
Locking torque is retained for a minimum of five reapplications
150,000 PSI minimum proof strength
Meets IFI and ANSI specifications
Developed for Grade 8 applications
Designed for use with Tuff-Torq® Cap Screws
Identified by six symmetrically spaced marks on the chamfered surface on the top of the nut
NOTE: Not recommended for use above 450°F (232°C).
For recommended torque values, see Lawson’s E546 brochure.
Couldn't load pickup availability
California Proposition 65: WARNING: Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
Frequently Bought Together

Hex Nut Grade 8 Steel 5/16-18
Couldn't load pickup availability

USS Flat Washer Low Carbon Steel 5/16"
Couldn't load pickup availability

Hex Nut Grade 8 Steel 1/2-13
Couldn't load pickup availability

IFI 100/107 Top Locknut Grade C 1-8
Couldn't load pickup availability

DIN 985 Locknut with Nylon Insert Grade 8 M8-1.25
Couldn't load pickup availability

SAE J995C Locknut with Nylon Insert Grade A #10-32
Couldn't load pickup availability

Hex Nut Grade 8 Steel M5-0.8
Couldn't load pickup availability

Hex Nut Grade 5 Steel 7/16-14
Couldn't load pickup availability

Hex Nut Grade 8 Alloy Steel 7/16-14
Couldn't load pickup availability

SAE Flat Washer Thru-Hardened Steel 5/8"
Couldn't load pickup availability

Self-Drilling Screw Hex Head #10-16 x 3/4"
Couldn't load pickup availability

Flat Washer Grade 12 Thru-Hardened Steel M12
Couldn't load pickup availability

Class 3 High Visibility Bomber Jacket Size Large
Couldn't load pickup availability

Plow Bolt High Strength A9 5/8-11 x 2-1/4"
Couldn't load pickup availability

Sluff Snowplow Treatment 11oz
Couldn't load pickup availability

817WP Thermal Utility Mechanics Style Gloves
Couldn't load pickup availability

710 Trades Mechanics Style Gloves
Couldn't load pickup availability

620 Knee Sleeve
Couldn't load pickup availability
Product Description
The Top Locknut Grade C delivers uncompromising reliability when your high-stress applications demand it most. This heat-treated, vibration-resistant locknut maintains its grip through severe conditions that would cause standard nuts to fail, ensuring your critical assemblies stay secure even under extreme vibration and repeated stress cycles. Engineered specifically for Grade 8 applications, it retains its locking torque through a minimum of five reapplications while meeting stringent IFI and ANSI specifications with 150,000 PSI minimum proof strength. Whether you're working on heavy machinery, automotive assemblies, or industrial equipment, this Grade C locknut provides the dependable hold that keeps your work running smoothly and safely. Heat-treated for matched strength
Will not loosen even under severe vibration
Locking torque is retained for a minimum of five reapplications
150,000 PSI minimum proof strength
Meets IFI and ANSI specifications
Developed for Grade 8 applications
Designed for use with Tuff-Torq® Cap Screws
Identified by six symmetrically spaced marks on the chamfered surface on the top of the nut
NOTE: Not recommended for use above 450°F (232°C).
For recommended torque values, see Lawson’s E546 brochure.
Technical Specifications
Item#: | 80928 |
---|---|
Diameter | 5/16 " |
Thread Pitch | 18 |
Grade | C |
Finish | Zinc/Wax |
Type | Top Lock Nut |
Material | Alloy Steel |
Thickness | 0.336 " |
Across Flats | 1/2 " |
Thread | Coarse |
Size | 5/16-18 |
Specifications | IFI 100/107 |
Maximum Temperature | 450º F |
Proof | 150,000 PSI |
UNSPSC #: | 31161716 |
TAA Compliant: | No |
Weight: | 1.01 lb |
Product Restrictions
California Proposition 65: WARNING: Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
