Description:

A Hi-Collar washer is thicker and has a smaller outside diameter than a regular split lock washer.

 

Advantages:

Designed for use with smaller head screws, particularly sockets. Performs comparably to a regular split lock washer as a greater
thickness compensates for smaller outside diameter.

 

Lockwashers, Split Hi Collar Pattern

 

 

HI-COLLAR HELICAL SPRING LOCK WASHERS ASME B18.21.1-1999
Nominal Washer Size
 A
B
(T+t)
2
 W
Inside Diameter Outside Diameter Mean Section Thickness Section Width
Max Min Max Min Min
#4
0.112
0.120
0.114
0.173
0.022
0.022
#6
0.138
0.148
0.141
0.216
0.030
0.030
#8
0.164
0.174
0.167
0.267
0.042
0.047
#10
0.190
0.200
0.193
0.294
0.042
0.047
1/4
0.250
0.260
0.252
0.363
0.047
0.078
5/16
0.312
0.322
0.314
0.457
0.062
0.093
3/8
0.375
0.385
0.377
0.550
0.076
0.125
7/16
0.4375
0.450
0.440
0.644
0.090
0.140
1/2
0.500
0.512
0.502
0.733
0.103
0.172
9/16
0.5625
0.574
0.564
0.819
0.116
0.187
5/8
0.625
0.641
0.628
0.917
0.125
0.203
3/4
0.750
0.766
0.753
1.105
0.154
0.218
7/8
0.875
0.894
0.878
1.291
0.182
0.234
1"
1.000
1.024
1.003
1.478
0.208
0.250
1-1/8
1.125
1.153
1.129
1.663
0.236
0.313
1-1/4
1.250
1.280
1.254
1.790
0.236
0.313
1-3/8
1.375
1.432
1.398
2.041
0.375
0.292
1-1/2
1.500
1.534
1.504
2.159
0.292
0.375
1-3/4
1.750
1.811
1.775
2.602
0.469
0.383
2"
2.000
2.061
2.025
2.852
0.469
0.383
2-1/4
2.250
2.311
2.275
3.352
0.508
0.508
2-1/2
2.500
2.561
2.525
3.602
0.508
0.508
2-3/4
2.750
2.811
2.775
4.102
0.633
0.633
3"
3.000
3.061
3.025
4.352
0.633
0.633

 

 

 

 

 

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