The tension generated by the deflection of the Mil-Spec regular helical spring split lock washer meets the needs of most commercial applications. It is, therefore, the most popular type spring lock washer in terms of usage and production. Our lockwashers are made in the USA. They meet all ASME standards in addition to RoHS and DFARS compliance when required.

Below we have charts for MS35338, NAS1640, and 12387272 Mil-Spec parts.

We also have Regular Helical Spring Split Lockwashers.

Material
C/S = Carbon Steel
304 SS = Type 304 Stainless Steel
316 SS = Type 316 Stainless Steel
420 SS = Type 420 Stainless Steel
PHO = Phosphor Bronze
KM = K-Monel

Ordering Example: #6-REG-C/S-MZ2 is a
#6 Regular carbon Steel with a
Mechanical Zinc & Yellow Dichromate finish.

Finish
PLN = Plain
CD1 = Cadmium & Clear Dichromate
CD2 = Cadmium & Yellow Dichromate
CD3 = Cadmium & Black Chromate
MZ1= Mechanical Zinc & Clear Dichromate
MZ2= Mechanical Zinc & Yellow Dichromate
ZN1 = Zinc & Clear Dichromate
ZN2 = Zinc & Yellow Dichromate
BKO = Black Oxide
PHO = Phosphate
HDG = Hot Dip Galvanized
MG = Mechanical Galvanized
Regular Helical Spring Split Lock Washer Dimension Drawing
Nominal
Washer
Size
Inside Diameter
A
Min.
Inside Diameter
A
Max.
Outside
Diameter
B Max.
Width
C
Min.
Thickness
D
Min.
Steel
Finish MS 35338 Dash Numbers1
CD2
Steel
Finish MS 35338 Dash Numbers1
CD2
Stainless
Type
3002 MS 35338 Dash Numbers1
Stainless
Type
420 MS 35338 Dash Numbers1
Bronze
Finish
CD8 MS 35338 Dash Numbers1
K
Monel
NAS 1640
Dash
No.3
20.0880.0940.1720.0350.025839134153961152
40.1140.120.2090.040.0255940135154971164
60.1410.1480.250.0470.0316041136155981176
80.1670.1740.2930.0550.046142137156991188
100.1930.20.3340.0620.047624313815710011910
1/40.2520.260.4870.1090.0626344139158101120416
5/160.3140.3220.5830.1250.0786445140159102121516
3/80.3770.3850.680.1410.0946546141160103122616
7/160.440.450.7760.1560.1096647142161104123716
1/20.5020.5120.8690.1710.1256748143162105124816
9/160.5640.5740.9650.1880.1416849144163106125916
5/80.6280.6411.0730.2030.15669501451641071261016
7/80.8780.8941.4590.2660.219715212851416
11.0031.0241.6560.2970.2572531481671101291616
1-1/81.1291.1531.8470.3280.281541471681111301816
1-1/41.2541.282.0360.3590.312551501691121312016
1-3/81.3971.4082.2190.3910.344561511701131322216
1-1/21.5041.5342.4190.4220.375571521711141332416
Footnotes: 1 – MS35338 replaces MS16214, MS35337, AN935 and NAS1061
2 – Series 300 – see referenced Mil Specifications or type requirements
3 – NAS1640 – (Stainless Steel) add P for BKO and add C for CD2
4 – Most sizes are stocked C/S PLN and C/S ZNI.
5 – Not stocked 20,000 lb. minimum material buy.