Metal Washer Distributor

Washers

Bayou City Bolt keeps a large variety of Washers in stock. In addition to the standard Flat and Split Lockwashers, we also stock Bellville, 1/4” Thick Washers, Wedge Lockwashers and many others.

  • 1/4" Thick Flat Washer
  • Bellville Washer
  • Bevel Washer
  • Flat Washer - USS, SAE
  • Fender Washer
  • Hillside Washer
  • High Collar Lockwasher
  • Load Indicator Washer
  • DTI
  • Malleable Round Washer
  • Ogee Washer
  • Lockwasher
  • Split Lockwasher
  • Square Plate Washer
  • Star Lockwasher
  • Serrated Wedge Lockwashers

Additional Specification

 

 

FLAT WASHERS

Washers provide a smooth bearing surface and are used under the head of a bolt and / or a nut. They help to create a larger, smooth bearing surface for the nut and/or bolt.

A washer is a thin plate with a hole that distributes the load of a threaded fastener, such as a screw or nut. They are also often also used as spacers. Washers usually have an outer diameter (OD) about twice the width of their inner diameter (ID).

High quality bolted joints require hardened steel washers to prevent the loss of pre-load due to Brinelling after the torque is applied.

FLAT WASHERS SPECIFICATIONS

ASTM F844 Standard Specification for Washers, Steel, Plain (Flat), Unhardened for General Use
ASTM F436 Standard Specification for Hardened Steel Washers
ASME B18.21.1 Washers: Helical Spring-Lock, Tooth Lock, and Plain Washers (Inch Series)
DIN 125 Standard Flat Washers
Spring Type Lock Washers Lock Washers are designed to increase the strength of the assembly
ASME B18.21.1 Washers: Helical Spring-Lock, Tooth Lock, and Plain Washers (Inch Series)

USS AND SAE WASHER DIMENSIONS

SizeUSS inside DiameterUSS Outside DiameterUSS ThicknessSAE Inside DiameterSAE Outside DiameterSAEThickness
#2       3/32 1/4 .020
#4       1/8 5/16 .032
#6       5/32 3/8 .049
#8       3/16 7/16 .049
#10       7/32 1/2 .049
#12       1/4 9/16 .065
1/4 5/16 23/32 .065 9/32 5/8 .065
5/16 3/8 7/8 .083 11/32 11/16 .065
3/8 7/16 1 .083 13/32 13/16 .065
7/16 1/2 1-1/4 .083 13/32 13/16 .065
1/2 9/16 1-3/8 .109 17/32 1-1/16 .095
9/16 5/8 1-15/32 .109 19/32 1-5/32 .095
5/8 11/16 1-3/4 .134 21/32 1-5/16 .095
3/4 13/16 2 .148 13/16 1-15/32 .134
7/8 15/16 2-1/4 .165 15/16 1-3/4 .134
1 1-1/16 2-1/2 .165 1-1/16 2 .134
1-1/8 1-1/4 2-3/4 .165      
1-1/4 1-3/8 3 .165      
1-3/8 1-1/2 3-1/4 .180      
1-1/2 1-5/8 3-1/2 .180      
1-5/8 1-3/4 3-3/4 .180      
1-3/4 1-7/8 4 .180      
2 2-1/8 4-1/2 .213      

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METRIC FLAT WASHER DIMENSIONS

SizeInside DiameterOutside DiameterThickness
4 4.3 9 .8
5 5.3 10 1
6 6.4 12 1.6
7 7.4 14 1.6
8 8.4 16 1.6
10 10.5 20 2
12 13 24 2.5
14 15 28 2.5
16 17 30 3
18 19 34 3
20 21 37 3
22 23 39 3
24 25 44 4
27 28 50 4
30 31 56 4
32 33 60 5
33 34 60 5
36 37 66 5
39 40 72 6
42 43 78 7
45 46 85 7
48 50 92 8
52 54 98 8

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INCH SERIES(US) LOCK WASHER DIMENSIONS

SizeInside DiameterOutside DiameterThickness
1/4 .260 .487 .062
5/16 .322 .583 .078
3/8 .385 .680 .094
7/16 .450 .776 .109
1/2 .512 .869 .125
5/8 .641 1.073 .156
3/4 .766 1.265 .188
7/8 .894 1.459 .219
1 1.024 1.656 .250
1-1/8 1.153 1.847 .281
1-1/4 1.280 2.036 .312
1-3/8 1.408 2.219 .344
1-1/2 1.534 2.419 .375
1-3/4 1.789 2.679 .389
2 2.039 2.936 .422
2-1/4 2.293 3.221 .440
2-1/2 2.543 3.471 .440
2-3/4 2.793 3.824 .458
3 3.043 4.074 .458

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METRIC LOCK WASHER DIMENSIONS

SizeInside DiameterOutside DiameterThickness
4 4.1 7.6 .9
5 5.1 9.2 1.2
6 6.1 11.8 1.6
7 7.1 12.8 1.6
8 8.1 14.8 2
10 10.2 18.1 2.2
12 12.2 21.1 2.5
14 14.2 24.1 3
16 16.2 27.4 3.5
18 18.2 29.4 3.5
20 20.2 33.6 4
22 22.5 35.9 4
24 24.5 40 5
27 27.5 43 5
30 30.5 48.2 6
33 33.5 55.2 6
36 36.5 58.2 6
39 39.5 61.2 6
42 42.5 68.2 7
45 45.5 71.2 7
48 49 75 7
52 53 83 8

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INCH SERIES (US) HI-COLLAR LOCK WASHER DIMENSIONS

SizeInside DiameterOutside DiameterThickness
1/4 .260 .363 .047
5/16 .322 .457 .062
3/8 .385 .55 .076
7/16 .450 .644 .090
1/2 .512 .733 .103
9/16 .574 .819 .116
5/8 .641 .917 .125
3/4 .766 1.105 .154
7/8 .894 1.291 .182
1 1.024 1.478 .208
1-1/8 1.153 1.663 .236
1-1/4 1.280 1.790 .236
1-1/2 1.534 2.159 .292

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METRIC HI-COLLAR LOCK WASHER DIMENSIONS

SizeInside DiameterOutside DiameterThickness
4 4.1 7 1.2
5 5.1 8.8 1.6
6 6.1 9.9 1.6
8 8.1 12.7 2
10 10.2 16 2.5
12 12.2 18 2.5
14 14.2 21.1 3
16 16.2 24.4 3.5
18 18.2 26.4 3.5
20 20.2 30.6 4.5
22 22.5 32.9 4.5
24 24.5 35.9 5
27 27.5 38.9 5
30 30.5 44.1 6
33 33.5 47.1 6
36 36.5 52.2 7
42 42.5 60.2 8

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We offer the lowest minimums in the industry, and sell by the piece or in
bulk - you buy only the fasteners you need!

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