Deformed Thread Lock Nuts

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Grade C Ultra-Lock Nuts - Coarse Thread (USS)
Grade C Ultra-Lock Nuts - Coarse Thread (USS)
Made in the U.S.A. from medium carbon steel and heat treated to meet Grade 8 performance standards. Developed to meet specifications of Automotive Fastener Engineering Specialists. Grade C nut provides predictable torque-tension in high strength applications. Features six dots at 60° intervals and three point top thread deflections for reusable torque. Cadmium and wax finish reduces application torque by up to 50%.
Diameter Width Across Flats Thread Size Thread Type Package Qty Item #
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1/4" 7/16" 1/4"-20 Coarse 50 344804 Log in to view price
5/16" 1/2" 5/16"-18 Coarse 50 344805 Log in to view price
3/8" 9/16" 3/8"-16 Coarse 50 344806 Log in to view price
7/16" 11/16" 7/16"-14 Coarse 50 344807 Log in to view price
1/2" 3/4" 1/2"-13 Coarse 50 344808 Log in to view price
9/16" 7/8" 9/16"-12 Coarse 25 344809 Log in to view price
5/8" 15/16" 5/8"-11 Coarse 25 344810 Log in to view price
3/4" 1-1/8" 3/4"-10 Coarse 25 344812 Log in to view price
7/8" 1-5/16" 7/8"-9 Coarse 10 344814 Log in to view price
1" 1-1/2" 1"-8 Coarse 10 344816 Log in to view price
1-1/8" 1-11/16" 1-1/8"-7 Coarse 5 344818 Log in to view price
1-1/4" 1-7/8" 1-1/4"-7 Coarse 2 344820 Log in to view price
Grade C Ultra-Lock Tall Nuts - Coarse Thread (USS)
Grade C Ultra-Lock Tall Nuts - Coarse Thread (USS)
High Head Grade 8 Cap Screws made in the U.S.A. from medium carbon steel, heat treated to meet Grade 8 standards. Features a grade C prevailing torque nut with six dots at 60° intervals for identification. Offers reduced application torque of up to 50% of standard values, ensuring reliability in high strength applications.
Diameter Width Across Flats Thread Size Thread Type Package Qty Item #
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1/4" 7/16" 1/4"-20 Coarse 50 344604 Log in to view price
5/16" 1/2" 5/16"-18 Coarse 50 344605 Log in to view price
3/8" 9/16" 3/8"-16 Coarse 50 344606 Log in to view price
7/16" 11/16" 7/16"-14 Coarse 50 344607 Log in to view price
1/2" 3/4" 1/2"-13 Coarse 25 344608 Log in to view price
5/8" 15/16" 5/8"-11 Coarse 25 344610 Log in to view price
3/4" 1-1/8" 3/4"-10 Coarse 10 344612 Log in to view price
Grade C Ultra-Lock Nuts - Fine Thread (SAE)
Grade C Ultra-Lock Nuts - Fine Thread (SAE)
Made in the U.S.A. from medium carbon steel, heat treated to meet Grade 8 performance standards. Developed for Automotive Fastener Engineering specifications. Features a grade C nut with a proven torque-tension relationship, six dots for identification, and three point top thread deflections for reusable performance. Cadmium and wax finish reduces application torque by up to 50%.
Diameter Width Across Flats Thread Size Thread Type Package Qty Item #
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1/4" 7/16" 1/4"-28 Fine 50 344904 Log in to view price
5/16" 1/2" 5/16"-24 Fine 50 344905 Log in to view price
3/8" 9/16" 3/8"-24 Fine 50 344906 Log in to view price
7/16" 11/16" 7/16"-20 Fine 50 344907 Log in to view price
1/2" 3/4" 1/2"-20 Fine 50 344908 Log in to view price
9/16" 7/8" 9/16"-18 Fine 25 344909 Log in to view price
5/8" 15/16" 5/8"-18 Fine 25 344910 Log in to view price
3/4" 1-1/8" 3/4"-16 Fine 25 344912 Log in to view price
7/8" 1-5/16" 7/8"-14 Fine 10 344914 Log in to view price
1" 1-1/2" 1"-14 Fine 10 344916 Log in to view price
1-1/8" 1-11/16" 1-1/8"-12 Fine 5 344918 Log in to view price
1-1/4" 1-7/8" 1-1/4"-12 Fine 2 344920 Log in to view price
Metric Class 10 (Coarse Thread) Prevailing Torque Locknuts
Metric Class 10 (Coarse Thread) Prevailing Torque Locknuts
The product features a built-in locking mechanism that, when fully torqued, ensures a complete locking action with the bolt threads. It has a zinc plated finish that provides corrosion resistance and is classified as Class 10, making it suitable for use with 10.9 cap screws.
Diameter Width Across Flats Thread Size Thread Type Package Qty Item #
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M6 10 mm M6 x 1 Coarse 25 464806 Log in to view price
M8 13 mm M8 x 1.25 Coarse 25 464808 Log in to view price
M10 17 mm M10 x 1.5 Coarse 25 464810 Log in to view price
M12 19 mm M12 x 1.75 Coarse 10 464812 Log in to view price
M14 22 mm M14 x 2.0 Coarse 10 464814 Log in to view price
M16 24 mm M16 x 2.0 Coarse 10 464816 Log in to view price
M18 27 mm M18 x 2.5 Coarse 5 464818 Log in to view price
M20 30 mm M20 x 2.5 Coarse 5 464820 Log in to view price
M22 32 mm M22 x 2.5 Coarse 5 464822 Log in to view price
M24 36 mm M24 x 3.0 Coarse 5 464824 Log in to view price
Metric Class 8 (Coarse Thread) Prevailing Torque Locknuts
Metric Class 8 (Coarse Thread) Prevailing Torque Locknuts
Zinc plated.
Diameter Width Across Flats Thread Size Thread Type Package Qty Item #
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M5 8 mm M5 x 0.8 Coarse 25 464805 Log in to view price
M8 13 mm M8 x 1 Fine 25 464908 Log in to view price
M10 17 mm M10 x 1.0 Very Fine 10 464911 Log in to view price
M10 17 mm M10 x 1.25 Fine 10 464910 Log in to view price
M12 19 mm M12 x 1.25 Very Fine 10 464913 Log in to view price
M12 19 mm M12 x 1.5 Fine 10 464912 Log in to view price
L9 (USS) Lock Nuts
L9 (USS) Lock Nuts
L9 FASTENING SYSTEM designed for high stress, severe service environments. HIGHEST MECHANICAL STRENGTH with superior holding power. HIGH GRADE ALLOY STEEL ensures strength and consistency. Hex nuts are yellow cadmium plated to AMS-QQ-P-416 Specifications. FULL CHAMFERS eliminate corner drag. HIGH HEX aids wrenching.
Diameter Width Across Flats Thread Size Thread Type Package Qty Item #
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1/4" 7/16" 1/4"-20 Coarse 50 349204 Log in to view price
5/16" 1/2" 5/16"-18 Coarse 50 349205 Log in to view price
3/8" 9/16" 3/8"-16 Coarse 50 349206 Log in to view price
7/16" 11/16" 7/16"-14 Coarse 50 349207 Log in to view price
1/2" 3/4" 1/2"-13 Coarse 50 349208 Log in to view price
9/16" 7/8" 9/16"-12 Coarse 25 349209 Log in to view price
5/8" 15/16" 5/8"-11 Coarse 25 349210 Log in to view price
3/4" 1-1/8" 3/4"-10 Coarse 25 349212 Log in to view price
7/8" 1-5/16" 7/8"-9 Coarse 10 349214 Log in to view price
1" 1-1/2" 1"-8 Coarse 10 349216 Log in to view price
Item Number: 349216
Package Weight: 2.9 lbs
L9 (SAE) Lock Nuts
L9 (SAE) Lock Nuts
L9 FASTENING SYSTEM designed for high stress, severe service environments. HIGHEST MECHANICAL STRENGTH with superior holding power. HIGH GRADE ALLOY STEEL ensures strength and consistency. Hex nuts are yellow cadmium plated to AMS-QQ-P-416 Specifications. FULL CHAMFERS eliminate corner drag. HIGH HEX aids wrenching.
Diameter Width Across Flats Thread Size Thread Type Package Qty Item #
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1/4" 7/16" 1/4"-28 Fine 50 349304 Log in to view price
5/16" 1/2" 5/16"-24 Fine 50 349305 Log in to view price
3/8" 9/16" 3/8"-24 Fine 50 349306 Log in to view price
7/16" 11/16" 7/16"-20 Fine 50 349307 Log in to view price
1/2" 3/4" 1/2"-20 Fine 50 349308 Log in to view price
9/16" 7/8" 9/16"-18 Fine 25 349309 Log in to view price
5/8" 15/16" 5/8"-18 Fine 25 349310 Log in to view price
3/4" 1-1/8" 3/4"-16 Fine 25 349312 Log in to view price

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