ASME/ANSI B 18.21.1 Spring Lock Washers Heavy

Category:Spring washers
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Release date:2025-05-14 17:11:33

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Product Name: ASME/ANSI B 18.21.1 Spring Lock Washers Heavy

Implementation standard: ASME/ANSI B 18.21.1 (Table 2)

Product Overview: ASME/ANSI B 18.21.1 Spring Lock Washers Heavy are Heavy Type Elastic Gaskets, ANSI thick spring washers, and enlarged open washers.，Open Helical Spring Flat Lock Washer

The main function of heavy open washers is that after tightening the nut, the spring washer will give the nut at the upper end an elastic force, thereby tightening the nut, increasing the friction between the nut and the product so that the nut is not easy to fall off, and playing a locking function. Heavy spring washers are generally used with heavy bolts. Spring washers can be divided into light spring washers (GB93, DIN127, UNI 1751, ASME/ANSI B 18.21.1 (Table 1)) and heavy spring washers (GB 7244 - 1987, ASME/ANSI B 18.21.1 (Table 2), SAE J 2655 - 2015). The difference between spring washers and flat washers: Spring washers can prevent loosening and increase preload, while flat washers do not have this function. Flat washers can be used to increase the fastening contact area, prevent friction between bolts and workpieces, and protect the surface of the connecting parts to prevent scratches on the workpiece surface when bolts and nuts are tightened.

Product materials: 304, 316, 316L, 70# steel, 65Mn, steel, etc.

Product grade: 100HV, 410-530HV, 430-510HV, 430-530HV, etc.

Product surface: blackening, blue-white zinc, colored zinc, black zinc, zinc-nickel alloy, hot-dip galvanizing, hot-dip galvanizing, geomet, Dacromet, electrophoresis, Teflon, baking varnish, road rust treasure, rust titanium and other customer-specified surface treatments

Product diameter: φ3#, φ3#, φ4#, φ5#, φ6#, φ8#, φ10#, φ12#, φ1/4, φ5/16, φ3/8, φ7/16, φ1/2, φ9/16, φ5/8, φ3/4, φ7/8, φ1", φ1-1/8, φ1-1/4, φ1-1/2, φ1-5/8, φ1-3/4, φ2", φ2-1/2 teeth, φ3", φ3-1/2, φ4" teeth

Product size

Size unit:inch

Nominal Diameter

10#

12#

1/4

5/16

3/8

7/16

1/2

d	Nominal Size
	Max
	Min
d_c	Max
h	Min
n	Min
n₁	Min

0.0860	0.0990	0.1120	0.1250	0.1380	0.1640	0.1900	0.2160	0.2500	0.3125	0.3750	0.4375	0.5000
0.094	0.107	0.120	0.133	0.148	0.174	0.200	0.227	0.260	0.322	0.385	0.450	0.512
0.088	0.101	0.114	0.127	0.141	0.167	0.193	0.220	0.252	0.314	0.377	0.440	0.502
0.182	0.209	0.223	0.252	0.266	0.307	0.350	0.391	0.489	0.593	0.688	0.784	0.879
0.025	0.031	0.031	0.040	0.040	0.047	0.056	0.063	0.077	0.097	0.115	0.133	0.151
0.040	0.047	0.047	0.055	0.055	0.062	0.070	0.077	0.110	0.130	0.145	0.160	0.176
0.028	0.033	0.033	0.038	0.038	0.043	0.049	0.054	0.077	0.091	0.101	0.112	0.123

Nominal Diameter

9/16

5/8

11/16

3/4

13/16

7/8

15/16

1-1/16

1-1/8

1-3/16

1-1/4

1-5/16

d	Nominal Size
	Max
	Min
d_c	Max
h	Min
n	Min
n₁	Min

0.5625	0.6250	0.6875	0.7500	0.8125	0.8750	0.9375	1.0000	1.0625	1.1250	1.1875	1.2500	1.3125
0.574	0.641	0.704	0.766	0.832	0.894	0.958	1.024	1.087	1.153	1.217	1.280	1.344
0.564	0.628	0.691	0.753	0.816	0.878	0.941	1.003	1.066	1.129	1.192	1.254	1.317
0.975	1.087	1.186	1.285	1.387	1.489	1.590	1.700	1.803	1.903	2.001	2.104	2.203
0.170	0.189	0.207	0.226	0.246	0.266	0.284	0.306	0.326	0.345	0.364	0.384	0.403
0.193	0.210	0.227	0.244	0.262	0.281	0.298	0.319	0.338	0.356	0.373	0.393	0.410
0.135	0.147	0.159	0.171	0.183	0.197	0.209	0.223	0.237	0.249	0.261	0.275	0.287

Nominal Diameter

1-3/8

1-7/16

1-1/2

1-5/8

1-3/4

1-7/8

2-1/4

2-1/2

2-3/4

d	Nominal Size
	Max
	Min
d_c	Max
h	Min
n	Min
n₁	Min

1.3750	1.4375	1.5000	1.6250	1.7500	1.8750	2.0000	2.2500	2.5000	2.7500	3.0000
1.408	1.472	1.534	1.663	1.789	1.914	2.039	2.293	2.543	2.793	3.043
1.379	1.442	1.504	1.633	1.758	1.883	2.008	2.262	2.512	2.762	3.012
2.301	2.396	2.491	2.694	2.820	2.945	3.144	3.398	3.648	3.910	4.160
0.422	0.440	0.458	0.458	0.458	0.458	0.496	0.496	0.496	0.526	0.526
0.427	0.442	0.458	0.491	0.491	0.491	0.526	0.526	0.526	0.532	0.532
0.299	0.309	0.321	0.344	0.344	0.344	0.368	0.368	0.368	0.372	0.372