Screw Driver Sockets
Above are 3 M-21 Standard screw driver sockets
9/32 specialty screw driver sockets 1925 – 1945
Name | Description | Year first Appeared | Year Last Appeared |
M-21 | Std Blade Screw Driver -short | 1933 | 1942 |
M-24 | Std Blade Screw Driver ¼ blade width -long | 1937 | 1942 |
M-25 | Std Blade Screw Driver 3/8 blade width –long | 1937 | 1942 |
M-26 | Std Blade Screw Driver 3/16 blade width -long | 1937 | 1942 |
M-27 | Butterfly driver (Clutch – type) 175 diameter | 1939 | 1941 |
M-30 | Butterfly driver (Clutch – type) 242 diameter | 1941 |
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M-31 | Butterfly driver (Clutch – type) 156 diameter | 1941 |
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MP-12 MP-12-2 | Philip#1 with replaceable blade | 1941 | 1942 |
MP- 22 MP-22-2 | Philip#2 with replaceable blade | 1941 | 1942 |
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M-28 | Phillips #1 | 1939 |
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M-29 | Phillips #2 | 1939 |
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MH-3 | 3/32 male hex | 1937 |
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MH-4 | 1/8 male hex | 1937 |
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MH-5 | 5/32 male hex | 1937 |
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Name | 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 |
Above are the screw driver sockets, M-25, M-24, M-26, M-8, &M29
Name | Description | Year first Appeared | Year Last Appeared |
MA-3, MA-3-2 , | Allen Head Wrench, with 2 interchangeable blades short and long 3/32 | 1941 |
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MA-4, MA-4-2, MA-4-3 | Allen Head Wrench, with 2 interchangeable blades short and long 1/8 | 1941 |
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MA-5, MA-5-2, MA-5-3 | Allen Head Wrench, with 2 interchangeable blades short and long 5/32 | 1941 |
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MA-6, MA-6-2, MA-6-3 | Allen Head Wrench, with 2 interchangeable blades short and long 3/16 | 1941 |
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MA-7, MA-7-2, MA-7-2 | Allen Head Wrench, with 2 interchangeable blades short and long 7/32 | 1941 |
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