High Strength - Heat Treated WashersMS 20002 – This specifica­tion replaced specifica­tion NAS 143 in 1954 and includes washers made from 4130 Chrome Molybdenum Steel. They are available with both flat and a 45° counter­sink, heat treated and plated. They are primarily for use with 160, 000 psi bolts.

MS 17811 – these are case hardened 1020 steel thrust washers, available in 23 sizes from WCL. They are designed primarily for supporting end load thrust bearings. Call for information.

MS 21206 – Washers available in this series are both plain and countersunk, made from Alloy Steel, heat treated and plated. They are normally used with MS21134 and MA 21297 bolts and with MS 21133 and MS 21804 nuts.

MS 9320 – Washers are made from AMS 6350 Corrosion Resistant Steel with Diffused Cadmium Nickel Plate.

NAS 1587 – Available both flat and with a 45° countersunk, these washers are made from Corrosive Resistant Steel with 75, 000 psi, UTS min.

10910174 Ordnance Washers – This specification covers 46 various sizes of washers made from Alloy Steel, heat treated and Cadmium Plated for military use. All are stocked by WCL. These washers also account for many commercial applications.

Available but not listed – The following Double Countersunk 45° MS Series washers are available from WCL, but space limita­tions prevent their listing: MS 9482, MS 9768, MS 14155, and MS 14177. Also available but not shown are countersunk washers with 100° angles and other special configurations.

Many other sizes of unlisted hardened washers are also in stock. If not listed here, call WCL to check availability and get samples and a quotation.

Screw/Bolt Size I.D. O.D. Thickness CTSK
P/N		 A
CTSK
I.D.		 B
CTSK
Depth		 C
CTSK
Degree		 Reference
Part Numbers		 Steel Plated Dash P/N Stainless
Steel Dash P/N
3 0.093 0.187 0.019 2W1G-6-6- 19
3 0.119 0.25 0.031 MS9320 04
4 0.124 0.245 0.04 ALLOY 4 X
4 0.135 0.312 0.031 MS9320 05
5 0.15 0.312 0.043 MS9320 06
6 0.159 0.375 0.043 MS9320 07
8 0.184 0.375 0.05 MS9320 08
10 0.193 0.367 0.062 C3 0.285 0.063 45° MS21206 3
10 0.193 0.377 0.062 MS21299 3
10 0.195 0.469 0.032 NAS1587 3
10 0.213 0.438 0.062 MS9320 09
1/4 0.253 0.465 0.062 C4 0.345 0.063 45° MS21206 4
1/4 0.253 0.481 0.062 MS21299 4
1/4 0.255 0.485 0.057 BACW10BP 4P
1/4 0.255 0.531 0.062 C4 0.339 0.078 45° MS20002 4
1/4 0.256 0.531 0.062 4C 0.339 0.078 45° NAS1587 4
1/4 0.265 0.5 0.065 NAS1149 G0463P
1/4 0.276 0.5 0.062 MS9320 10
1/4 0.281 0.5 0.089 10910174 1
1/4 0.281 0.625 0.089 10910174 34
1/4 0.281 1 0.089 10910174 20
5/16 0.316 0.568 0.062 C5 0.407 0.063 MS21206 5
5/16 0.319 0.593 0.062 C5 0.401 0.078 45° MS20002 5
5/16 0.319 0.593 0.062 5C 0.401 0.078 45° NAS1587 5
5/16 0.328 0.562 0.063 NAS1149 G0563P
5/16 0.338 0.625 0.062 MS9320 11
5/16 0.343 0.625 0.062 10910174 17
5/16 0.343 0.625 0.104 10910174
5/16 0.343 0.875 0.119 10910174 19
3/8 0.378 0.674 0.062 C6 0.502 0.078 45° MS21206 6
3/8 0.383 0.687 0.062 C6 0.489 0.078 45° MS20002 6
3/8 0.383 0.687 0.062 6C 0.489 0.078 45° NAS1587 6
3/8 0.39 0.625 0.063 NAS1149 G0663P
3/8 0.39 0.937 0.045 S6135-64028- 3
3/8 0.401 0.75 0.078 MS9320 12
3/8 0.406 0.7 0.158 10910174 33
3/8 0.406 0.75 0.119 10910174 3
3/8 0.406 0.875 0.134 10910174 22
3/8 0.406 1.125 0.199 10910174 16
7/16 0.438 0.922 0.065 ASTM A-325 X
7/16 0.441 0.778 0.062 C7 0.564 0.078 45° MS21206 7
7/16 0.446 0.781 0.062 C7 0.55 0.078 45° MS20002 7
7/16 0.446 0.781 0.062 7C 0.55 0.078 45° NAS1587 7
7/16 0.453 0.75 0.063 7C 0.55 0.078 45° NAS1149 G07636P
7/16 0.463 0.875 0.094 MS9320 13
7/16 0.468 0.75 0.119 10910174 26
7/16 0.468 0.875 0.119 10910174 4
7/16 0.468 0.875 0.25 10910174 35
7/16 0.482 0.905 0.29 12376084
1/2 0.501 0.888 0.062 4130 X
1/2 0.503 0.893 0.062 C8 0.627 0.078 45° MS21206 8
1/2 0.509 0.875 0.062 C8 0.612 0.078 45° MS20002 8
1/2 0.509 0.875 0.062 C8 0.612 0.078 45° NAS1587 8
1/2 0.515 0.875 0.063 NAS1149 G0863P
1/2 0.516 0.875 0.125 11678182
1/2 0.526 1 0.109 MS9320 14
1/2 0.531 0.875 0.06 10910174 37
1/2 0.531 0.875 0.089 10910174 30
1/2 0.531 0.875 0.127 10910174 43
1/2 0.531 1 0.134 10910174 5
1/2 0.531 1.5 0.06 10910174 40
1/2 0.531 2 0.209 10910174 28
1/2 0.562 1.5 0.16 9152386 X
9/16 0.566 1.004 0.062 C9 0.689 0.078 45° NS21206 9
9/16 0.57 0.968 0.062 C9 0.677 0.078 45° MS20002 9
9/16 0.57 0.968 0.062 C9 0.677 0.078 45° NAS1587 9
9/16 0.578 1.062 0.063 NAS1149 G0963P
9/16 0.588 1.125 0.125 MS9320 15
9/16 0.594 1.125 0.164 10910174 6
5/8 0.626 1.182 0.062 MS21299 10
5/8 0.629 1.12 0.062 C10 0.783 0.078 45° MS21206 10
5/8 0.638 1.062 0.062 C10 0.775 0.078 45° MS20002 10
5/8 0.638 1.062 0.062 C10 0.775 0.078 45° NAS1587 10
5/8 0.64 1.188 0.063 C10 0.775 0.078 45° NAS1587 G1063P
5/8 0.651 1.25 0.141 MS9320 16
5/8 0.656 1 0.119 10910174 31
5/8 0.656 1 0.25 10910174 21
5/8 0.656 1.25 0.164 10910174 7
5/8 0.656 1.25 0.25 10910174 18
5/8 0.656 1.5 0.089 10910174 44
5/8 0.656 1.75 0.179 10941915 7
5/8 0.656 1.75 0.25 10910174 38
5/8 0.656 2.5 0.125 10910174 25
5/8 0.687 1.312 0.093 A-325 X
3/4 0.754 1.345 0.062 C12 0.908 0.078 45° MS21206 X
3/4 0.765 1.25 0.062 C12 0.9 0.078 45° MS20002 12
3/4 0.765 1.25 0.062 C12 0.9 0.078 45° NAS1587 12
3/4 0.765 1.312 0.09 NAS1149 G1290P
3/4 0.765 1.38 0.125 4130 X
3/4 0.776 1.5 0.172 MS9320 17
3/4 0.78 1.5 0.062 10910174 41
3/4 0.781 1.5 0.093 10910174 24
3/4 0.781 1.5 0.125 10910174 42
3/4 0.781 1.687 0.25 10910174 23
3/4 0.812 2 0.179 10910174 15
3/4 0.812 2 0.194 10910174 8
7/8 0.879 1.567 0.062 C14 1.033 0.078 45° MS21206 14
7/8 0.877 2.25 0.187 MS17811 18
7/8 0.888 1.437 0.062 C14 1.025 0.078 45° MS20002 14
7/8 0.888 1.437 0.062 C14 1.025 0.078 45° NAS1587 14
7/8 0.89 1.5 0.09 NAS1149 G1490P
7/8 0.901 1.75 0.203 MS9320 18
7/8 0.938 1.781 0.194 10910174 9
1″ 1.015 1.625 0.062 C16 1.15 0.078 45° MS2002 16
1″ 1.015 1.625 0.062 C16 1.15 0.078 45° NAS1587 16
1″ 1.015 1.75 0.09 NAS1149 G1690P
1″ 1.02 1.72 0.06 10910174 29
1″ 1.026 2 0.234 MS9320 19
1″ 1.062 2.031 0.209 10910174 10
1-1/16 1.078 1.812 0.09 NAS1149 G1890P
1-1/8 1.145 1.875 0.062 C18 1.275 0.078 45° MS20002 18
1-1/8 1.145 1.875 0.062 C18 1.275 0.078 45° NAS1587 18
1-1/4 1.265 2 0.09 NAS1149 G2090P
1-1/4 1.269 2.125 0.062 C20 1.437 0.094 45° MS20002 20
1-1/4 1.269 2.125 0.094 C20 1.437 0.094 45° NAS1587 20
1-5/16 1.328 2.062 0.09 NAS1149 G2190P
1-3/8 1.395 2.313 0.062 C22 1.562 0.094 45° MS20002 22
1-1/2 1.515 2.5 0.062 C24 1.687 0.094 45° MS20002 24

WCL Part Numbers – reference part example: 10910174-42 above is WCL part: FW-0781-1500-125-ST4-CD2

fw-06a

Use Reference and/or MilSpec part numbers when needed. Specify hardness requirements as needed. See Plating And Material Specifications for a complete
listing of materials, finishes and applicable WCL codes.