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.377 Insulating Washers (Shoulder)

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*Slightly Chamfered to Permit Smooth Entry / Fit.

Build Part Number
Material & Shape
Shoulder Length		 Tolerances
All Technical Data
Worksheet Helper		 Conversion Chart
Metric Insulating Washers
Am. Standard Insulating Washers
.377 Inside Diameter - For 3/8" Fasteners
CHOOSE and write down your PART NUMBER
then Go to Skip Step 1
Chart 1- Length of Shoulder- Dimension E
Other Code
Dim. E		 A
.015		 B
.025		 C
.040		 E
.058		 F
.085		 G
.120		 H
.182		 J
.215		 K
.245		 M
.300		 R
.360		 S
.425		 V
.490		  
Part Number A B C D E L Part Number A B C D E L  
WS1851 .500 .400 .031 .377

See
Chart 1

 L=C+E WS1911 .750 .495 .031 .377


See
Chart 1

 L=C+E  
WS1852 .500 .400 .047 .377 WS1912 .750 .495 .047 .377
WS1853 .500 .400 .060 .377 WS1913 .750 .495 .060 .377
WS1854 .500 .400 .093 .377 WS1914 .750 .495 .093 .377
WS1855 .500 .400 .120 .377 See
Chart 1		 L=C+E WS1915 .750 .495 .120 .377 See
Chart 1		 L=C+E  
WS1856 .531 .430 .031 .377 WS1916 .750 .560 .031 .377
WS1857 .531 .430 .047 .377 WS1917 .750 .560 .047 .377
WS1858 .531 .430 .060 .377 WS1918 .750 .560 .060 .377
WS1859 .531 .430 .093 .377 See
Chart 1		 L=C+E WS1919 .750 .560 .093 .377 See
Chart 1		 L=C+E  
WS1860 .531 .430 .120 .377 WS1920 .750 .560 .120 .377
WS1861 .531 .465 .031 .377 WS1921 .875 .465 .031 .377
WS1862 .531 .465 .047 .377 WS1922 .875 .465 .047 .377

 
Part Number A B C D E L Part Number A B C D E L  
WS1863 .531 .465 .060 .377


See
Chart 1

 L=C+E WS1923 .875 .465 .060 .377


See
Chart 1

 L=C+E  
WS1864 .531 .465 .093 .377 WS1924 .875 .465 .093 .377
WS1865 .531 .465 .120 .377 WS1925 .875 .465 .120 .377
WS1866 .562 .400 .031 .377 WS1926

.875

 .495 .031 .377
WS1867 .562 .400 .047 .377 See
Chart 1		 L=C+E WS1927

.875

 .495 .047 .377 See
Chart 1		 L=C+E  
WS1868 .562 .400 .060 .377 WS1928

.875

 .495 .060 .377
WS1869 .562 .400 .093 .377 WS1929

.875

 .495 .093 .377
WS1870 .562 .400 .120 .377 WS1930

.875

 .495 .120 .377
WS1871 .562 .430 .031 .377 See
Chart 1		 L=C+E WS1931

.875

 .560 .031 .377 See
Chart 1		 L=C+E  
WS1872 .562 .430 .047 .377 WS1932

.875

 .560 .047 .377
WS1873 .562 .430 .060 .377 WS1933

.875

 .560 .060 .377
WS1874 .562 .430 .093 .377 WS1934

.875

 .560 .093 .377

 
Part Number A B C D E L Part Number A B C D E L  
WS1875 .562 .430 .120 .377


See
Chart 1

 L=C+E WS1935 .875 .560 .120 .377


See
Chart 1

 L=C+E  
WS1876 .562 .465 .031 .377 WS1936 .875 .620 .031 .377
WS1877 .562 .465 .047 .377 WS1937 .875 .620 .047 .377
WS1878 .562 .465 .060 .377 WS1938 .875 .620 .060 .377
WS1879 .562 .465 .093 .377 See
Chart 1		 L=C+E WS1939 .875 .620 .093 .377 See
Chart 1		 L=C+E  
WS1880 .562 .465 .120 .377 WS1940 .875 .620 .120 .377
WS1881 .625 .430 .031 .377 WS1941 .875 .685 .031 .377
WS1882 .625 .430 .047 .377 WS1942 .875 .685 .047 .377
WS1883 .625 .430 .060 .377 See
Chart 1		 L=C+E WS1943 .875 .685 .060 .377 See
Chart 1		 L=C+E  
WS1884 .625 .430 .093 .377 WS1944 .875 .685 .093 .377
WS1885 .625 .430 .120 .377 WS1945 .875 .685 .120 .377
WS1886 .625 .465 .031 .377 WS1946 .875 .745 .031 .377

 
Part Number A B C D E L Part Number A B C D E L  
WS1887 .625 .465 .047 .377


See
Chart 1

 L=C+E WS1947 .875 .745 .047 .377


See
Chart 1

 L=C+E  
WS1888 .625 .465 .060 .377 WS1948 .875 .745 .060 .377
WS1889 .625 .465 .093 .377 WS1949 .875 .745 .093 .377
WS1890 .625 .465 .120 .377 WS1950 .875 .745 .120 .377
WS1891 .625 .495 .031 .377 See
Chart 1		 L=C+E WS1951 1.000 .465 .031 .377 See
Chart 1		 L=C+E  
WS1892 .625 .495 .047 .377 WS1952 1.000 .465 .047 .377
WS1893 .625 .495 .060 .377 WS1953 1.000 .465 .060 .377
WS1894 .625 .495 .093 .377 WS1954 1.000 .465 .093 .377
WS1895 .625 .495 .120 .377 See
Chart 1		 L=C+E WS1955 1.000 .465 .120 .377 See
Chart 1		 L=C+E  
WS1896 .625 .560 .031 .377 WS1956 1.000 .495 .031 .377
WS1897 .625 .560 .047 .377 WS1957 1.000 .495 .047 .377
WS1898 .625 .560 .060 .377 WS1958 1.000 .495 .060 .377

 
Part Number A B C D E L Part Number A B C D E L  
WS1899 .625 .560 .093 .377


See
Chart 1

 L=C+E WS1959 1.000 .495 .093 .377


See
Chart 1

 L=C+E  
WS1900 .625 .560 .120 .377 WS1960 1.000 .495 .120 .377
WS1901 .750 .430 .031 .377 WS1961 1.000 .620 .031 .377
WS1902 .750 .430 .047 .377 WS1962 1.000 .620 .047 .377
WS1903 .750 .430 .060 .377 See
Chart 1		 L=C+E WS1963 1.000 .620 .060 .377 See
Chart 1		 L=C+E  
WS1904 .750 .430 .093 .377 WS1964 1.000 .620 .060 .377
WS1905 .750 .430 .120 .377 WS1965 1.000 .620 .120 .377
WS1906 .750 .465 .031 .377 WS1966 1.000 .685 .031 .377
WS1907 .750 .465 .047 .377 See
Chart 1		 L=C+E WS1967 1.000 .685 .047 .377 See
Chart 1		 L=C+E  
WS1908 .750 .465 .060 .377 WS1968 1.000 .685 .060 .377
WS1909 .750 .465 .093 .377 WS1969 1.000 .685 .093 .377
WS1910 .750 .465 .120 .377 WS1970 1.000 .685 .120 .377
Tolerances

A

 Major Diameter ± .005
B Shank Diameter + .000 /  - .005
C Thickness of Head ± .005
D Inside Diameter + .006 /  - .000
E Length of Shoulder ± .005
L Overall Length + .010 /  - .005
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