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Nord-Lock Large OD Locking Washers, Carbon Steel

Click for a larger picture of Nord-Lock Large OD Locking Washers, Carbon Steel
Click for a larger picture of Nord-Lock Large OD Locking Washers, Carbon Steel

Brand: NORD-LOCK

Nord-Lock washers are designed to prevent threaded fasteners from loosening. Each Nord-Lock consists of two washers with interlocking faces. The cam angle on the interlocking faces is greater than the thread pitch angle, effectively increasing the torque required to loosen the fastener. Mild carbon steel with zinc flake coating for corrosion resistance. Each is enough for one nut or one bolt (order 2 to lock both ends of a nut-and-bolt joint).

The NLCS-SP Series washers have a relatively large OD, similar to a standard flat washer. They are designed for use under a standard hex bolt head or a nut. Note that this size is not appropriate for use under a socket-head ("Allen") cap screw in a counterbored hole. (The smaller OD of the Nord-Lock NLCS Series matches the OD of standard socket-head screw heads). Install a Nord-Lock in place of a flat washer only. Using a Nord-Lock with a flat washer will defeat the locking action.

Nord-Lock NLCS-SP Series Locking Washers for Nuts and Hex-Head Bolts
Nominal Size SAE Size Metric Size ID (inch) ID (metric) OD (inch) OD (metric) Thickness (inch) Thickness (metric) Part No.
M5 #10 M5 0.21" 5.3mm 0.43" 10.9mm 0.07" 1.8mm NLCS‑SP‑M5
M6   M6 0.26" 6.6mm 0.53" 13.5mm 0.10" 2.5mm NLCS-SP-M6
1/4" 1/4"   0.28" 7.1mm 0.53" 13.5mm 0.10" 2.5mm NLCS‑SP‑.250
M8 5/16" M8 0.34" 8.6mm 0.65" 16.5mm 0.10" 2.5mm NLCS-SP-M8
3/8" 3/8"   0.41" 10.4mm 0.83" 21.1mm 0.10" 2.5mm NLCS‑SP‑.375
M10   M10 0.42" 10.7mm 0.83" 21.1mm 0.10" 2.5mm NLCS‑SP‑M10
M12   M12 0.51" 13mm 1.00" 25.4mm 0.13" 3.3mm NLCS‑SP‑M12
1/2" 1/2"   0.53" 13.5mm 1.00" 25.4mm 0.13" 3.3mm NLCS‑SP‑.500
M14 9/16" M14 0.60" 15.2mm 1.21" 30.7mm 0.13" 3.3mm NLCS‑SP‑M14
M16 5/8" M16 0.67" 17mm 1.21" 30.7mm 0.13" 3.3mm NLCS‑SP‑M16
M18   M18 0.77" 19.6mm 1.36" 34.5mm 0.13" 3.3mm NLCS‑SP‑M18
3/4" 3/4"   0.79" 20.1mm 1.54" 39.1mm 0.13" 3.3mm NLCS‑SP‑.750
M20   M20 0.84" 21.3mm 1.54" 39.1mm 0.13" 3.3mm NLCS‑SP‑M20
M22 7/8" M22 0.92" 23.4mm 1.65" 41.9mm 0.18" 4.6mm NLCS‑SP‑M22
M24   M24 1.0" 25.4mm 1.91" 48.5mm 0.18" 4.6mm NLCS‑SP‑M24
1" 1"   1.1" 27.9mm 1.91" 48.5mm 0.18" 4.6mm NLCS‑SP‑1.00

Enter desired order quantities below, then click the "Add selected quantities to cart" button.

Order Qty
Part No.
Desc.
Price
Stock Status

NLCS-SP-.250
Condition: New
SKU: 85082

1/4" Nord-Lock Large OD Steel Washer, 0.28 ID x 0.53 OD

$0.64In Stock

NLCS-SP-.375
Condition: New
SKU: 85083

3/8" Nord-Lock Large OD Steel Washer, 0.41 ID x 0.83 OD

$1.25In Stock

NLCS-SP-.500
Condition: New
SKU: 85084

1/2" Nord-Lock Large OD Steel Washer, 0.53 ID x 1.00 OD

$1.75In Stock

NLCS-SP-.750
Condition: New
SKU: 85085

3/4" Nord-Lock Large OD Steel Washer, 0.79 ID x 1.54 OD

$4.44In Stock

NLCS-SP-1.00
Condition: New
SKU: 85086

1.0" Nord-Lock Large OD Steel Washer, 1.10 ID x 1.91 OD

$7.99In Stock

NLCS-SP-M5
Condition: New
SKU: 85087

M5 (#10) Nord-Lock Large OD Steel Washer, 0.21 ID x 0.43 OD

$0.59In Stock

NLCS-SP-M6
Condition: New
SKU: 85088

M6 Nord-Lock Large OD Steel Washer, 0.26 ID x 0.53 OD

$0.64In Stock

NLCS-SP-M8
Condition: New
SKU: 85089

M8 (5/16") Nord-Lock Lrg OD Steel Washer, 0.34 ID x 0.65 OD

$0.74In Stock

NLCS-SP-M10
Condition: New
SKU: 85090

M10 Nord-Lock Large OD Steel Washer, 0.42 ID x 0.83 OD

$1.25In Stock

NLCS-SP-M12
Condition: New
SKU: 85091

M12 Nord-Lock Large OD Steel Washer, 0.51 ID x 1.00 OD

$1.75In Stock

NLCS-SP-M14
Condition: New
SKU: 85092

M14 (9/16") Nord-Lock Lrg OD Steel Washer, 0.60 ID x 1.21 OD

$2.59In Stock

NLCS-SP-M16
Condition: New
SKU: 85093

M16 (5/8") Nord-Lock Lrg OD Steel Washer, 0.67 ID x 1.21 OD

$2.59In Stock

NLCS-SP-M18
Condition: New
SKU: 85094

M18 Nord-Lock Large OD Steel Washer, 0.77 ID x 1.36 OD

$3.79In Stock

NLCS-SP-M20
Condition: New
SKU: 85095

M20 Nord-Lock Large OD Steel Washer, 0.84 ID x 1.54 OD

$4.44In Stock

NLCS-SP-M22
Condition: New
SKU: 85097

M22 (7/8") Nord-Lock Lrg OD Steel Washer, 0.92 ID x 1.65 OD

$6.54In Stock

NLCS-SP-M24
Condition: New
SKU: 85096

M24 Nord-Lock Large OD Steel Washer, 1.00 ID x 1.91 OD

$7.99In Stock