Locknuts
52 results
Grade 8 Nylon Insert Lock Nuts - Coarse Thread (USS)
Pairing with Grade 8 bolts (6 dots/double notched corners), these zinc-yellow nuts have a purple nylon collar to lock vibration up to 250°F. The 360° locking ring prevents thread galling and allows easy adjustments. Perfect for heavy-duty fastener assemblies.
| Diameter | Thread Size | Width Across Flats | Height | Material | Finish | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|---|
|
1/4"
|
1/4"-20
|
7/16"
|
5/16"
|
Carbon Steel
|
Yellow Zinc Plated
|
50
|
348404
|
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|
|
Package Weight: 0.5 lbs
|
||||||||
|
5/16"
|
5/16"-18
|
1/2"
|
11/32"
|
Carbon Steel
|
Yellow Zinc Plated
|
50
|
348405
|
Log in to view price
|
|
Package Weight: 0.6 lbs
|
||||||||
|
3/8"
|
3/4"-16
|
9/16"
|
29/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348406
|
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|
|
Package Weight: 0.4 lbs
|
||||||||
|
7/16"
|
7/16"-14
|
5/8"
|
29/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348407
|
Log in to view price
|
|
Package Weight: 0.6 lbs
|
||||||||
|
1/2"
|
1/2"-13
|
3/4"
|
19/32"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348408
|
Log in to view price
|
|
Package Weight: 1.1 lbs
|
||||||||
|
9/16"
|
9/16"-12
|
7/8"
|
41/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348409
|
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|
|
Package Weight: 1.7 lbs
|
||||||||
|
5/8"
|
5/8"-11
|
15/16"
|
3/4"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348410
|
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|
|
Package Weight: 2.2 lbs
|
||||||||
|
3/4"
|
3/4"-10
|
1-1/16"
|
7/8"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348412
|
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|
|
Package Weight: 1.3 lbs
|
||||||||
|
7/8"
|
7/8"-9
|
1-1/8"
|
63/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348414
|
Log in to view price
|
|
1"
|
1"-8
|
1-7/16"
|
1-3/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348416
|
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|
|
Package Weight: 2.7 lbs
|
||||||||
|
1-1/8"
|
1-1/8"-7
|
1-5/8"
|
1-11/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348418
|
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|
|
Package Weight: 3.8 lbs
|
||||||||
|
1-1/4"
|
1-1/4"-7
|
1-13/16"
|
1-25/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348420
|
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|
|
Package Weight: 5.7 lbs
|
||||||||
Grade 8 Nylon Insert Lock Nuts - Fine Thread (SAE)
Built for Grade 8 applications (double notches or 6 dots), these nuts offer a purple nylon collar and are zinc-yellow plated to fight corrosion. They lock firmly at up to 250°F, ensuring a 360° hold. Ideal for high-strength, vibration-prone assemblies.
| Diameter | Thread Size | Width Across Flats | Height | Material | Finish | Package Qty | Item # |
Price
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|---|---|---|---|---|---|---|---|---|
|
1/4"
|
1/4"-28
|
7/16"
|
5/16"
|
Carbon Steel
|
Yellow Zinc Plated
|
50
|
348504
|
Log in to view price
|
|
Package Weight: 0.4 lbs
|
||||||||
|
5/16"
|
5/16"-24
|
1/2"
|
11/32"
|
Carbon Steel
|
Yellow Zinc Plated
|
50
|
348505
|
Log in to view price
|
|
Package Weight: 0.6 lbs
|
||||||||
|
3/8"
|
3/8"-24
|
9/16"
|
29/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348506
|
Log in to view price
|
|
Package Weight: 0.5 lbs
|
||||||||
|
7/16"
|
7/16"-20
|
5/8"
|
29/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348507
|
Log in to view price
|
|
Package Weight: 0.5 lbs
|
||||||||
|
1/2"
|
1/2"-20
|
3/4"
|
19/32"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348508
|
Log in to view price
|
|
Package Weight: 1.1 lbs
|
||||||||
|
9/16"
|
9/16"-18
|
7/8"
|
41/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348509
|
Log in to view price
|
|
Package Weight: 1.6 lbs
|
||||||||
|
5/8"
|
5/8"-18
|
15/16"
|
3/4"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348510
|
Log in to view price
|
|
Package Weight: 2.1 lbs
|
||||||||
|
3/4"
|
3/4"-16
|
1-1/16"
|
7/8"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348512
|
Log in to view price
|
|
Package Weight: 1.2 lbs
|
||||||||
|
7/8"
|
7/8"-14
|
1-1/8"
|
63/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348514
|
Log in to view price
|
|
Package Weight: 1.9 lbs
|
||||||||
|
1"
|
1"-14
|
1-7/16"
|
1-3/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348516
|
Log in to view price
|
|
Package Weight: 2.7 lbs
|
||||||||
|
1-1/8"
|
1-1/8"-12
|
1-5/8"
|
1-11/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348518
|
Log in to view price
|
|
Package Weight: 3.7 lbs
|
||||||||
|
1-1/4"
|
1-1/4"-12
|
1-13/16"
|
1-25/64"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348520
|
Log in to view price
|
|
Package Weight: 5.5 lbs
|
||||||||
Grade C Ultra-Lock Reversible Lock Nuts - Coarse Thread (USS)
Produced from medium carbon steel and heat treated to meet Grade 8 performance standards. Developed for Automotive Fastener Engineering specifications. Features grade C prevailing torque design, reversible installation, and corrosion resistant yellow dichromate finish. Withstands severe shock and vibration loads, maintaining locking torque through up to 5 installations.
| Diameter | Thread Size | Width Across Flats | Height | Material | Finish | Package Qty | Item # |
Price
Want to view pricing for this product?
Log In or Create Login Not a Kimball Midwest Customer? Register |
|---|---|---|---|---|---|---|---|---|
|
1/4"
|
1/4"-20
|
7/16"
|
7/32"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348704
|
Log in to view price
|
|
5/16"
|
5/16"-18
|
1/2"
|
17/64"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348705
|
Log in to view price
|
|
3/8"
|
3/8"-16
|
9/16"
|
21/64"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348706
|
Log in to view price
|
|
7/16"
|
7/16"-14
|
11/16"
|
3/8"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348707
|
Log in to view price
|
|
1/2"
|
1/2"-13
|
3/4"
|
7/16"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348708
|
Log in to view price
|
|
9/16"
|
9/16"-12
|
7/8"
|
31/64"
|
Carbon Steel
|
Yellow Dichromate
|
25
|
348709
|
Log in to view price
|
|
5/8"
|
5/8"-11
|
15/16"
|
35/64"
|
Carbon Steel
|
Yellow Dichromate
|
25
|
348710
|
Log in to view price
|
|
3/4"
|
3/4"-10
|
1-1/8"
|
41/64"
|
Carbon Steel
|
Yellow Dichromate
|
25
|
348712
|
Log in to view price
|
|
7/8"
|
7/8"-9
|
1-5/16"
|
47/64"
|
Carbon Steel
|
Yellow Dichromate
|
10
|
348714
|
Log in to view price
|
|
1"
|
1"-8
|
1-1/2"
|
55/64"
|
Carbon Steel
|
Yellow Dichromate
|
10
|
348716
|
Log in to view price
|
|
Package Weight: 2.7 lbs
|
||||||||
Grade C Ultra-Lock Reversible Lock Nuts - Fine Thread (SAE)
Produced from medium carbon steel and heat treated to meet Grade 8 performance standards. Developed for Automotive Fastener Engineering specifications. Features grade C prevailing torque design, reversible installation, and corrosion resistant yellow dichromate finish. Withstands severe shock and vibration loads, maintaining locking torque through up to 5 installations.
| Diameter | Thread Size | Width Across Flats | Height | Material | Finish | Package Qty | Item # |
Price
Want to view pricing for this product?
Log In or Create Login Not a Kimball Midwest Customer? Register |
|---|---|---|---|---|---|---|---|---|
|
1/4"
|
1/4"-28
|
7/16"
|
7/32"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348804
|
Log in to view price
|
|
5/16"
|
5/16"-24
|
1/2"
|
17/64"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348805
|
Log in to view price
|
|
3/8"
|
3/8"-24
|
9/16"
|
21/64"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348806
|
Log in to view price
|
|
7/16"
|
7/16"-20
|
11/16"
|
3/8"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348807
|
Log in to view price
|
|
1/2"
|
1/2"-20
|
3/4"
|
7/16"
|
Carbon Steel
|
Yellow Dichromate
|
50
|
348808
|
Log in to view price
|
|
9/16"
|
9/16"-18
|
7/8"
|
31/64"
|
Carbon Steel
|
Yellow Dichromate
|
25
|
348809
|
Log in to view price
|
|
5/8"
|
5/8"-18
|
15/16"
|
35/64"
|
Carbon Steel
|
Yellow Dichromate
|
25
|
348810
|
Log in to view price
|
|
3/4"
|
3/4"-16
|
1-1/8"
|
41/64"
|
Carbon Steel
|
Yellow Dichromate
|
25
|
348812
|
Log in to view price
|
|
7/8"
|
7/8"-14
|
1-5/16"
|
47/64"
|
Carbon Steel
|
Yellow Dichromate
|
10
|
348814
|
Log in to view price
|
|
1"
|
1"-14
|
1-1/2"
|
55/64"
|
Carbon Steel
|
Yellow Dichromate
|
10
|
348816
|
Log in to view price
|
Grade 8 Nylon Insert Flange Lock Nuts - Coarse Thread (USS)
Produced from medium carbon steel and heat treated to meet Grade 8 performance standards. Developed to meet specifications of Automotive Fastener Engineering Specialists. Features a proven torque-tension relationship with Grade 8 bolts. Identified by six dots at 60° intervals on the crown. Zinc yellow plated with cadmium and wax finish. MADE IN THE U.S.A.
| Diameter | Thread Size | Width Across Flats | Height | Material | Finish | Package Qty | Item # |
Price
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Log In or Create Login Not a Kimball Midwest Customer? Register |
|---|---|---|---|---|---|---|---|---|
|
1/4"
|
1/4"-20
|
7/16"
|
0.3"
|
Carbon Steel
|
Yellow Zinc Plated
|
50
|
348604
|
Log in to view price
|
|
5/16"
|
5/16"-18
|
1/2"
|
0.365"
|
Carbon Steel
|
Yellow Zinc Plated
|
50
|
348605
|
Log in to view price
|
|
3/8"
|
3/8"-16
|
9/16"
|
0.425"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348606
|
Log in to view price
|
|
1/2"
|
1/2"-13
|
3/4"
|
0.555"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348608
|
Log in to view price
|
|
5/8"
|
5/8"-11
|
15/16"
|
0.69"
|
Carbon Steel
|
Yellow Zinc Plated
|
25
|
348610
|
Log in to view price
|
|
3/4"
|
3/4"-10
|
1-1/8"
|
0.825"
|
Carbon Steel
|
Yellow Zinc Plated
|
10
|
348612
|
Log in to view price
|
Top
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Pkg Qty: 50
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Pkg Qty: 25
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Pkg Qty: 25
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Pkg Qty: 25
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Pkg Qty: 10
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Pkg Qty: 50
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Pkg Qty: 25
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Pkg Qty: 10
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Pkg Qty: 50
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Pkg Qty: 25
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