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LOCK WASHERS

LOCK WASHERS

Split lock washers are made mostly from coils of wire. Lock washers made from coil are subject to high volume production runs. Steel and stainless steel lock washers become work hardened in the manufacturing process and possess more strength and spring than the raw material. Lock washers made from nickel-based alloys and stainless, other than 18-8 or 316, are generally machined from plate stock. There is not enough demand to make these parts from coil. Washers made from plate are not as strong as those made from coil and cannot be reused. Nickel Systems maintains an inventory of split lock washers, and we can re-machine certain sizes to produce hi-collar lock washers for use with socket head cap screws.

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Specifications & Technical Data

Dimensions

lock washer dimensional drawing
Nominal Washer Size Inside Diameter, A Maximum Outside Diameter, B Minimum Mean Section Thickness (ti + to)/2, T Minimum Section Width, W Minimum Bearing Width, BW
Max. Min.
#2 (0.086) 0.094 0.088 0.172 0.020 0.035 0.024
#3 (0.099) 0.107 0.101 0.195 0.025 0.040 0.028
#4 (0.112) 0.120 0.114 0.209 0.025 0.040 0.028
#5 (0.125) 0.133 0.127 0.236 0.031 0.047 0.033
#6 (0.138) 0.148 0.141 0.250 0.031 0.047 0.033
#8 (0.164) 0.174 0.167 0.293 0.040 0.055 0.038
#10 (0.190) 0.200 0.193 0.334 0.047 0.062 0.043
#12 (0.216) 0.227 0.220 0.377 0.056 0.070 0.049
1/4 (0.250) 0.260 0.252 0.487 0.062 0.109 0.076
5/16 (0.3125) 0.322 0.314 0.583 0.078 0.125 0.087
3/8 (0.375) 0.385 0.377 0.680 0.094 0.141 0.099
7/16 (0.4375) 0.450 0.440 0.776 0.109 0.156 0.109
1/2 (0.500) 0.512 0.502 0.869 0.125 0.171 0.120
9/16 (0.5625) 0.574 0.564 0.965 0.141 0.188 0.132
5/8 (0.625) 0.641 0.628 1.073 0.156 0.203 0.142
11/16 (0.6875) 0.704 0.691 1.170 0.172 0.219 0.153
3/4 (0.750) 0.766 0.753 1.265 0.188 0.234 0.164
13/16 (0.6875) 0.832 0.816 1.363 0.203 0.250 0.175
7/8 (0.875) 0.894 0.878 0.459 0.219 0.266 0.186
15/16 (0.9375) 0.958 0.941 1.556 0.234 0.281 0.197
1 (1.000) 1.024 1.003 1.656 0.250 0.297 0.208
1 1/16 (1.0625) 1.087 1.066 1.751 0.266 0.312 0.218
1 1/8 (1.125) 1.153 1.129 1.847 0.281 0.328 0.230
1 3/16 (1.1875) 1.217 1.192 1.943 0.297 0.344 0.241
1 1/4 (1.250) 1.280 1.254 2.036 0.312 0.359 0.251
1 5/16 (1.3125) 1.344 1.317 2.133 0.328 0.375 0.262
1 3/8 (1.375) 1.408 1.379 2.219 0.344 0.391 0.274
1 7/16 (1.4375) 1.147 1.442 2.324 0.359 0.406 0.284
1 1/2 (1.500) 1.534 1.504 2.419 0.375 0.422 0.295
1 5/8 (1.625) 1.663 1.633 2.553 0.389 0.424 0.297
1 3/4 (1.750) 1.789 1.758 2.679 0.389 0.424 0.297
1 7/8 (1.875) 1.914 1.883 2.811 0.422 0.427 0.299
2 (2.000) 2.039 2.008 2.936 0.422 0.427 0.299
2 1/4 (2.250) 2.293 2.262 3.221 0.440 0.442 0.309
2 1/2 (2.500) 2.543 2.512 3.471 0.440 0.442 0.309
2 3/4 (2.750) 2.793 2.762 3.824 0.458 0.491 0.344
3 (3.000) 3.043 3.012 4.074 0.458 0.491 0.334

 

Lock Washers Specifications

  • ASME B18.21.1-2009
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LOCK WASHERS Available Materials

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Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

Nickel Systems maintains an inventory of split lock washers in Hastelloy® (Alloys C276, C22, B2), Carpenter® 20 (Alloy 20), 18-8 and 316 Stainless. Current inventory includes 317L Stainless, K-Monel® (Alloy 500) and AL6XN®. Additionally, we can re-machine certain sizes to produce hi-collar lock washers for use with socket head cap screws.

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