Home Fasteners Nuts Lock Nuts IFI 100/107 Top Locknut Grade C 5/16-18
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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)

Item#: 80928

Tuff-Torq®

• 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.

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Check Availability

California Proposition 65: WARNING: Cancer and Reproductive Harm -
www.P65Warnings.ca.gov

Catalog page#: 11-12, 11-28

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Product Description

• 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
Specifications IFI 100/107
Maximum Temperature 450º F
Proof 150,000 PSI
Quantity Per Package 100.0000
UNSPSC #: 31161716
TAA Compliant: No
Weight: 1.01 lb

Product Restrictions

California Proposition 65: WARNING: Cancer and Reproductive Harm -
www.P65Warnings.ca.gov

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