The 9/32 sockets 1925 - 1945

M-4 1925-1926 - gripper driver. This does not show up in the catalogs. Very few examples are known, but here are 2 examples

9/32 sockets 1925 - 1945

There are 2 basic socket styles. The first style exists from 1925 to 1929. After this, the newer style in a Nickel finish existed into the 1940 when Nickel shortages caused an oil finish to be used

Name OLD KNURL STYLE	Description	Year first Appeared	Year Last Appeared
M-8	¼” Socket	1925	1929 est
M-9	9/32” Socket	1925	1929 est
M-10	5/16” Socket	1925	1929 est
M-11	11/32” Socket	1925	1929 est
M-12	3/8” Socket	1925	1929 est
M-14	7/16” Socket	1925	1929 est
M-408	¼ “ Square	1925	1929 est
M-410	5/16” Square	1925	1929 est

The set contained a single broached hex.

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The set contained a single broached hex.

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The set contained a single broached Square in 2 sizes, and when the socket style changed, it became double broached

Name New Style	Description	Year first Appeared	Year Last Appeared
M-6	3/16” Socket	1933	1942
M-7	7/32” Socket	1933	1942
M-8	¼” Socket	1931	1942
M-9	9/32” Socket	1931	1942
M-10	5/16” Socket	1931	1942
M-11	11/32” Socket	1931	1942
M-12	3/8” Socket	1931	1942
M-14	7/16” Socket	1931	1942
M-408	¼ “ Square	1931	1942
M-410	5/16” Square	1931	1942
MI-15	15/64 Socket	1937	1942
MI-17	17/64 Socket	1937	1942

A metric set was available, but I have not seen any – It is very rare

Name New Style	Description	Year first Appeared	Year Last Appeared
M-6	3/16” Socket	1939	Unknown
M-4M	4mm	1939	Unknown
M-5M	5mm	1939	Unknown
M-6M	6mm	1939	Unknown
M-7M	7mm	1939	Unknown
M-8M	8mm	1939	Unknown
M-9M	9mm	1939	Unknown
M-10M	10mm	1939	Unknown

In 1941 a series of deep sockets were introduced

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Here is the set that remained through 1945

Name	Description	Year first Appeared	Year Last Appeared
SM-6	3/16 Deep socket	1941	1942
SM-7	7/32 Deep socket	1939	1942
SM-10	5/16 Deep socket (radio)	1937	1942
SM-11	11/32 Deep socket (radio)	1937	1942
SM-12	3/8 Deep socket (radio)	1937	1942
SM-14	7/16 Deep socket (radio)	1937	1942
SM-15	15/32 Deep socket (radio)	1937	1942

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