Steel Lock Washers | McMaster-Carr

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	System of Measurement System of Measurement

	For Screw Size For Screw Size

	Material Material

Chrome-Vanadium Steel

High-Carbon Steel

	Finish Finish

Zinc Yellow-Chromate Plated

Hot-Dipped Galvanized

Black Phosphate

Yellow Zinc Plated

Zinc-Flake Coated

	Washer Type Washer Type


Split Lock	Tooth Lock

Spring Lock	Countersunk

Tab Lock	Wedge Lock

	ID ID

	OD OD

	Thickness Thickness

0.010" to 0.015"

0.010" to 0.016"

0.012" to 0.018"

0.014" to 0.020"

0.015" to 0.019"

0.016" to 0.022"

0.017" to 0.021"

0.018" to 0.023"

0.018" to 0.024"

0.020" to 0.025"

0.020" to 0.027"

0.023" to 0.027"

0.023" to 0.028"

0.025" to 0.031"

0.027" to 0.031"

0.028" to 0.034"

0.032" to 0.040"

0.034" to 0.044"

0.036" to 0.042"

0.037" to 0.045"

0.040" to 0.050"

0.042" to 0.050"

0.047" to 0.053"

0.047" to 0.055"

0.048" to 0.052"

0.049" to 0.055"

0.052" to 0.058"

0.052" to 0.060"

0.054" to 0.070"

0.059" to 0.065"

0.059" to 0.067"

0.060" to 0.064"

0.060" to 0.080"

0.073" to 0.083"

0.075" to 0.081"

0.075" to 0.082"

0.076" to 0.080"

0.090" to 0.110"

0.095" to 0.101"

0.120" to 0.140"

0.127" to 0.141"

0.146" to 0.162"

0.163" to 0.181"

0.170" to 0.190"

0.182" to 0.202"

0.200" to 0.222"

0.219" to 0.243"

0.220" to 0.240"

0.238" to 0.263"

0.250" to 0.270"

0.270" to 0.290"

0.360" to 0.380"

0.2 to 0.4 mm

0.2 to 0.5 mm

0.3 to 0.5 mm

0.4 to 0.6 mm

0.5 to 0.7 mm

0.6 to 0.8 mm

0.7 to 0.9 mm

0.8 to 1.0 mm

0.9 to 1.1 mm

0.9 to 1.2 mm

1.0 to 1.4 mm

1.1 to 1.3 mm

1.2 to 1.5 mm

1.2 to 1.6 mm

1.3 to 1.7 mm

1.5 to 1.7 mm

1.9 to 2.1 mm

2 to 2.4mm

2.3 to 2.7 mm

2.8 to 3.2 mm

3.3 to 3.7 mm

3.8 to 4.2 mm

4.3 to 4.7 mm

4.8 to 5.2 mm

5.8 to 6.2 mm

	For Shaft Diameter For Shaft Diameter

	Disc Spring Type Disc Spring Type


Belleville	Wave

Curved	Finger

	Specifications Met Specifications Met

DIN

Mil. Spec.

NAS

	Working Load Working Load

Less than 1,000 lbs.

1,000 to 1,999 lbs.

2,000 to 2,999 lbs.

3,000 to 9,999 lbs.

10,000 lbs. or greater

	Height Height

	Hardness Hardness

Rockwell C40-50

	Split Lock Washer Type Split Lock Washer Type


Curved	Standard

	Tooth Location Tooth Location

	External
	Internal
	Internal/External

	Deflection @ Working Load Deflection @ Working Load

0.125" to 0.249"

0.25" to 0.499"

0.5" or greater

1 mm to 1.99 mm

2 mm to 2.99 mm

3 mm to 4.99 mm

5 mm or greater

	For Hole Diameter For Hole Diameter

	Flat Load Flat Load

Less than 1,000 lbs.

1,000 to 1,999 lbs.

2,000 to 9,999 lbs.

10,000 to 19,999 lbs.

20,000 lbs. or greater

	Serration Location Serration Location

	Spring Lock Washer Shape Spring Lock Washer Shape


Conical	Curved

	For Bearing Trade Number For Bearing Trade Number

607
608
609
623
624
625
626
627
629
634
635
636
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6017
6018
6020
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6215
6216
6217
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6903
EL3
EL4
EL5
EL7
EL8
EL9
R2
R3
R4
R4A
R6
R8
R10
R12
R14
R16
R18
R20
R22
R24

	Overall Height Overall Height

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1,163 Products

Lock Washers

Split Lock Washers

As a screw is tightened, these washers flatten to add tension to the joint and prevent loosening from small amounts of vibration.

Metric Split Lock Washers

As you tighten a bolt, these metric washers flatten to add tension to the threaded joint and prevent loosening from small amounts of vibration.

Split Lock Washers for
Socket Head Screws

Also known as high-collar lock washers, these have smaller outside diameters than standard split lock washers to fit neatly under socket head screws.

Oversized Split Lock Washers

Compared to standard split lock washers, these are thicker and have larger outside diameters.

Tooth Lock Washers

Teeth bite into the joint for a tighter grip than split lock washers.

Spring Lock Washers

Also known as conical washers, these have a slightly cupped shape that gives them spring-like flexibility to grip tighter than split and tooth lock washers. They minimize loosening from wear, temperature changes, and vibration.

Wedge Lock Washers

Also known as NORD-LOCK® washers, these two-piece washers provide more locking power than split, tooth, and spring lock washers. Wedges on the inside lock the two pieces together, and serrations on the exterior grip surfaces to resist loosening from high vibration and shifting.

Tab Lock Washers

Bend the tab of these lock washers against the flats of a hex nut or bolt head to prevent the fastener and washer from turning and loosening.

Other Steel Lock Washers

Lock Washer Assortments

testString

These washers have a locking feature to resist loosening from vibration.

Disc Springs

Install on shafts, under bolt heads, and at the ends of valves to maintain tension and separate components. Unlike washers, disc springs return to their original height once the load is removed.

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The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)