3/8 Special Sockets and Sets
1929 Chevy oil pan screw socket F-9l
Specials | Description | Date range |
F-9 | Chevy oil pan screws | 1929 |

3/8 Zerk-Alemite Socket

Catalog drawing
Alemite fittings are for lubricating rotating shafts and bearings. It is a way to pressure grease into tight fits that are impossible to reach directly. These are pin- and button-type fittings that temporarily sealed to match couplings on the end of pressurized grease guns. They were introduced in 1916 and were used in White Army trucks. In 1929 an improved fitting called the Zerk fitting was patented. These are grease fittings with a nipple or Zerk. They match a grease gun fitting
Specials | Description | Date range |
F-13 | Zerk-Alemite Socket | 1929 – 1933 |
3/8 1932 Ferret Tap Chuck socket

Catalog drawing
Pretty simple tool it adapts a 3/8 inch ratchet to a reamer. The original stated use was for Buick to ream out door hinges. Obviously quick, but there are tools made for this job that are much better and this trend did not catch on
Special Sockets | Description | Date range |
F-15 | Ferret Tap Chuck | 1929-1932 |
3/8 1933 Essex cars oil plug socket

Catalog drawiing
Apparently the 1933 Essex cars have a fitting on the flywheel that is the oil filler plug. This socket fits that car.
Special Sockets | Description | Date range |
FH-14 | Special for Essex oil cap on fly wheel 7/16 | 1933 |
3/8 Pipe plug sockets

Male is the PPM series and Female is the PP series
Male pipe plug set
Pipe Socket | Description | Date range |
PPM-406 | 3/16 inch | 1995 |
PPM-408 | ¼ inch | 1978 – 1995 |
PPM-410 | 5/16 inch | 1953 -1995 |
PPM-411 | 11/32 inch | 1967-1995 |
PPM-412 | 5/8 inch | 1955-1995 |
F
Female pipe plug set
Pipe Sockets | Description | Date range |
PP-409 | Piping plug socket 9/32” square for drains on cars | 1942-1955 |
PP-410 | Piping plug socket 5/16” square for drains on cars | 1948-1955 |
PP-412 | Piping plug socket 3/8” square for drains on cars | 1948-1955 |
3/8 RS-4 (Ratchet Speeder) progression

Catalog drawings
Valve Clearance Adjusting Tool
Adjusts rocket tappet adjusting nuts for early cars predating hydraulic lifters
Tool | Description | Date |
No. 21 | Valve Clearance Adjusting Tool | 1927-1929 |
V-21H | Valve Clearance Adjusting handle | 1931-1935 |
V-160 | ½ socket | 1931-1935 |
V-180 | 9/16 socket | 1931-1935 |
V-200 | 5/8 socket | 1931-1935 |
3/8 S-9540A Windshield Wiper Socket

S-9540A 1959
S-9540A 1959. This is a windshield wiper socket for 1955 – 1958 Chevy and Pontiac
3/8 Weather Head Socket progression

1947 and the 1948 socket style change
Weather Head sockets are use for hydraulic fittings common in the aviation industry
Weather head Sockets | Size | Date range |
FD-6 | 3/16 | 1941-1965 |
FD-8 | ¼ | 1941-1965 |
FD-10 | 5/16 | 1941-1965 |
FD-12 | 3/8 | 1953-1965 |
Weather head |
| Date range |
FD-120 | 3/8 | 1970 – 1995 |
FD-140 | 7/16 | 1970 – 1995 |
FD-150 | 15/32 | 1970 – 1995 |
FD-160 | ½ | 1970 – 1995 |
FD-170 | 17/32 | 1970 – 1995 |
FD-180 | 9/16 | 1970 – 1995 |
FD-190 | 19/32 | 1970 – 1995 |
FD-210 | 21/32 | 1970 – 1995 |
FD-220 | 11/16 | 1970 – 1995 |
FD-240 | ¼ | 1970 – 1995 |
FD-250 | 25/32 | 1970 – 1995 |
3/8 Allen Head Sockets 1929

Allen Head socket
There was a Mr. Allen and an Allen Manufacturing Company in Hartford, CT that promotes the Hex bolt and screw heads and the wrenches to turn them. The female bolt and screw head existed for many years before this company, but they popularized the tool and the name. The Allen Head requires less space (diameter) and can be used in recessed areas. The tolerances are tighter than normal bolts as well. This is more importance in places where weight and limited access space are the norm – In plane and aviation applications
Allen Sockets | Description | Date range |
FA-6 | Allen head 3/16 | 1948-1953 |
FA-7 | Allen head 7/32 | 1948-1953 |
FA-8 | Allen head ¼ | 1941-1953 |
FA-10 | 5/16 Allen head | 1941-1953 |
FA-12 | 3/8 Allen head | 1941-1953 |
FH-6 | Allen Head 3/16 | 1937 |
FH-7 | Allen Head 7/32 | 1937 |
FH-8 | Allen Head ¼ | 1937 |
FH-10 | Allen Head 5/16 | 1937 |
FH-12 | Allen Head 3/8 | 1937 |
Snap on Special Sockets | Description | Date Range |
FA-4.5A | Allen 9/64 | 1967-1995 |
FA-4A | Allen 1/8 | 1967-1995 |
FA-5A | Allen 5/32 short | 1958-1995 |
FA-5L | Allen 5/32 long | 1960-1995 |
FA-6A | Allen 3/16 | 1955-1995 |
FA-6L | Allen 3/16 Long | 1975-1995 |
FA-7A | Allen 7/32 | 1955-1995 |
FA-7L | Allen 7/32 | 1960-1995 |
FA-8A | Allen ¼ | 1955-1995 |
FA-8L | Allen ¼ | 1975-1995 |
FA-10A | Allen 5/16 | 1955-1960 |
FA-10B | Allen 5/16 | 1962-1995 |
FA-10L | Allen 5/16 Long | 1960-1995 |
FA-12A | Allen 3/8 | 1955-1995 |
FA-12L | Allen 3/8 | 1975-1995 |
FAL-6 | Allen 3/16 long | 1962-1995 |
FAL-8 | Allen ¼ long | 1962-1995 |
FAXS7 | Allen 7/32 | 1995 |
FAXS8 | Allen ¼ | 1995 |
FAXS10 | Allen 5/16 | 1995 |
FAXS12 | Allen 3/8 | 1995 |
Power Hex Sockets | Size | Date range |
PF-100 | 5/16 | 1955-1960 |
PF-110 | 11/32 | 1955-1960 |
PF-120 | 3/8 | 1955-1960 |
PF-140 | 7/16 | 1955-1960 |
PF-150 | 13/32 | 1958-1960 |
PF-160 | ½ | 1955-1960 |
PF-170 | 17/32 | 1958-1960 |
PF-180 | 9/16 | 1955-1960 |
PF-200 | 5/8 | 1955-1960 |
PF-220 | 11/16 | 1955-1960 |
PF-240 | ¾ | 1955-1960 |