Page 1 of 2
REV-02
Fastenal Product Standard
Date: July 1, 2016
LW.EXT.Z
Lock Washers, External Tooth, Zinc Plated
The information below lists the required dimensional, chemical and physical characteristics of the products in this purchase order. If
the order received does not meet these requirements, it may result in a supplier corrective action request, which could jeopardize your
status as an approved vendor. Unless otherwise specified, all referenced consensus standards must be adhered to in their entirety.
Nominal
Washer
Size
#3
#4
#5
#6
#8
#10
#12
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1 1/8
1 1/4
1 1/2
A
B
C
Inside
Diameter
Outside
Diameter
Thickness
Max.
.109
.123
.136
.150
.176
.204
.231
.267
.332
.398
.464
.530
.596
.663
.795
.927
1.060
1.142
1.293
1.580
Min.
.102
.115
.129
.141
.168
.195
.221
.256
.320
.384
.448
.513
.576
.641
.768
.897
1.025
1.128
1.269
1.560
Max.
.235
.260
.285
.320
.381
.410
.475
.510
.610
.694
.760
.900
.985
1.070
1.260
1.410
1.620
1.827
2.202
2.392
Min.
.220
.245
.270
.305
.365
.395
.460
.494
.588
.670
.740
.880
.960
1.045
1.220
1.380
1.590
1.797
2.172
2.359
Max.
.016
.018
.020
.022
.023
,024
.027
.028
.034
.040
.040
.045
.045
.050
.055
.060
.067
.067
.067
.099
Min.
.010
.012
.014
.016
.018
.018
.020
.023
.028
.032
.032
.037
.037
.042
.047
.052
.059
.059
.059
.091
Page 2 of 2
Date: July 1, 2016
Fastenal Product Standard
REV-02
LW.EXT.Z
Specification Requirements:
•
•
•
•
Dimensions:
Material:
Finish:
Hydrogen Embrittlement:
ASME B18.21.1, Type A. (Except sizes 1 1/8” to 1 ½”)
Carbon Steel, SAE J403 1050-1065
Ze/Zn 3AN per ASTM F1941/F1941M
Baking to relieve internal hydrogen embrittlement is
mandatory and shall be performed after electroplating
prior to the application of conversion finish where baking
temperatures can damage the conversion film. Baking may be
allowed after conversion finish provided temperature does not
alter performance. Part temperature shall reach 375°F to
425°F (190°C to 220°C) for a minimum of 24 hours, as soon
as practical after plating.
Hydrogen Embrittlement test results shall be maintained and
supplied to Fastenal upon request.