The ANSI B18.21.1 Spring Washer is a type of helical spring lock washer made from either 304 or 316 grade stainless steel, manufactured according to the ANSI/ASME B18.21.1 standard. 304/316 Stainless Steel ANSI B18.21.1 Spring Washers provide effective, reliable solutions for preventing the loosening of fasteners in various high-stress, dynamic, and corrosive environments. Their durable construction, compliance with industry standards, and superior performance make them a top choice for mechanical assemblies that require long-term reliability and stability.
Parameter Information
|
Brand name |
American-made standard spring washers |
|
Standard |
ANSI B18.21.1 |
|
Category |
Elastic pad |
|
Material |
304/316 stainless steel |
|
Standard type |
American standard |
|
Surface treatment |
Stainless steel washing |
|
Packaging |
Packaging bag + carton packaging |
Specification
|
Thread specification -d |
d |
dc |
h |
h |
||
|
Nominal |
max |
min |
max |
min |
min |
|
|
2# |
0.096 |
0.094 |
0.088 |
0.175 |
0.02 |
0.035 |
|
3# |
0.099 |
0.107 |
0.101 |
0.195 |
0.025 |
0.04 |
|
4# |
0.112 |
0.12 |
0.114 |
0.209 |
0.025 |
0.04 |
|
5# |
0.125 |
0.133 |
0.127 |
0.236 |
0.031 |
0.047 |
|
6# |
0.138 |
0.148 |
0.141 |
0.25 |
0.031 |
0.047 |
|
8# |
0.164 |
0.174 |
0.167 |
0.293 |
0.04 |
0.055 |
|
10# |
0.19 |
0.2 |
0.193 |
0.334 |
0.047 |
0.062 |
|
12# |
0.216 |
0.227 |
0.22 |
0.377 |
0.056 |
0.07 |
|
1/4″ |
0.25 |
0.26 |
0.252 |
0.487 |
0.062 |
0.109 |
|
5/16″ |
0.3125 |
0.322 |
0.314 |
1.583 |
0.078 |
0.125 |
|
3/8″ |
0.375 |
0.385 |
0.377 |
0.68 |
0.094 |
0.141 |
|
7/16″ |
0.4375 |
0.45 |
0.44 |
0.776 |
0.109 |
0.156 |
|
1/2″ |
0.5 |
0.512 |
0.5.2 |
0.869 |
0.125 |
0.171 |
|
9/16″ |
0.5625 |
0.574 |
0.564 |
0.965 |
0.141 |
0.188 |
|
5/8″ |
0.625 |
0.641 |
0.628 |
1.073 |
0.156 |
0.203 |
|
11/16″ |
0.6875 |
0.704 |
0.691 |
1.17 |
0.172 |
0.219 |
|
3/4″ |
0.75 |
0.766 |
0.753 |
1.265 |
0.188 |
0.234 |
|
13/16″ |
0.8125 |
0.832 |
0.816 |
1.363 |
0.203 |
0.25 |
|
7/8″ |
0.875 |
0.894 |
0.878 |
1.459 |
0.219 |
0.266 |
|
15/16″ |
0.9375 |
0.958 |
0.941 |
1.556 |
0.234 |
0.281 |
|
1″ |
1 |
1.024 |
1.003 |
1.656 |
0.25 |
0.297 |
|
1-1/16″ |
1.0625 |
1.087 |
1.066 |
1.751 |
0.266 |
0.312 |
|
1-1/8″ |
1.125 |
1.153 |
1.129 |
1.847 |
0.281 |
0.328 |
|
1-3/16″ |
1.1875 |
1.217 |
1.192 |
1.943 |
0.297 |
0.344 |
|
1-1/4″ |
1.25 |
1.28 |
1.254 |
2.036 |
0.312 |
0.359 |
|
1-5/16″ |
1.3125 |
1.344 |
1.317 |
2.133 |
0.328 |
0.375 |
|
1-3/8″ |
1.375 |
1.408 |
1.379 |
2.219 |
0.344 |
0.391 |
|
1-7/16″ |
1.4375 |
1.472 |
1.442 |
2.324 |
0.359 |
0.406 |
|
1-1/2″ |
1.5 |
1.534 |
1.504 |
2.419 |
0.375 |
0.422 |
|
1-5/8″ |
1.625 |
1.663 |
1.633 |
2.553 |
0.389 |
0.424 |
|
1-3/4″ |
1.75 |
1.789 |
1.758 |
2.679 |
0.389 |
0.424 |
|
1-7/8″ |
1.875 |
1.914 |
1.883 |
2.811 |
0.422 |
0.427 |
|
2″ |
2 |
2.039 |
2.008 |
2.936 |
0.422 |
0.427 |
|
2-1/4″ |
2.25 |
2.293 |
2.262 |
3.221 |
0.44 |
0.442 |
|
2-1/2″ |
2.5 |
2.543 |
2.512 |
3.471 |
0.44 |
0.442 |
|
2-3/4″ |
2.75 |
2.793 |
2.762 |
3.824 |
0.458 |
0.491 |
|
3″ |
3 |
3.304 |
3.012 |
4.047 |
0.458 |
0.491 |
