| 1) |
The first digit denotes the Square Drive. |
|
2 = 1/4"
3 = 3/8"
4 = 1/2"
6 = 3/4"
8 = 1"
7 = 1 1/2" |
|
All Square Drive codes that are prefixed with a 1 refer to an Impact Socket/Accessory/Set, etc. for example:
| CODE |
|
|
| (1)2 |
1 = Impact |
2 = 1/4" Drive... |
| (1)3 |
1 = Impact |
3 = 3/8" Drive... |
| (1)4 |
1 = Impact |
4 = 1/2" Drive... |
| (1)6 |
1 = Impact |
6 = 3/4" Drive... |
| (1)8 |
1 = Impact |
8 = 1" Drive... |
| (1)7 |
1 = Impact |
7 = 1 1/2: Drive... |
|
| 2) |
The second digit denotes the type of tool. For example:
| 0 = Bit Sockets |
20... = 1/4" Drive Bit Socket |
| 2 = Sets |
22... = 1/4" Drive Set |
| 3 = Deep Sockets |
23... = 1/4" Drive Deep Socket |
| 4 = Standard Sockets |
24... = 3/8" Drive Std Socket |
| 7 = Accessories |
37... = 3/8" Drive Accessory |
|
| 3) |
The third and fourth digits refer to the type of Socket or Accessory:
| 00 = 6 Point Socket |
49/50/52/53 = Ratchet |
| 05 = 12 Point Socket |
60 = Extension Bar |
| 10/11/12/20/25 = Special Type Sockets |
68 = Hinge Bar |
| 15 = 8 Point Socket |
70/71 = Universal Joint Style |
|
85 = Sliding "T" Handle |
|
|
These numbers repeat themselves throughout the range for the same tools in various Square Drives, for example:
| CODE |
|
|
|
| 6405 |
6 = 3/4" Drive |
4 = Std Socket |
05 = 12 Point |
| 4400 |
4 = 1/2" Drive |
4 = Std Socket |
00 = 6 Point |
| 2300 |
2 = 1/4" Drive |
3 = Deep Socket |
00 = 6 Point |
| 8770 |
8 = 1" Drive |
7 = Accessory |
70 = Universal |
|
| 4) |
Codes that end with A = Imperial, M = Metric and W = Whitworth identify the type of socket, for
| CODE |
|
|
|
|
| 3400A |
3 = 3/8" Drive |
4 = Std Socket |
00 = 6 Point |
A = Imperial |
| 4400M |
4 = 1/2" Drive |
4 = Std Socket |
00 = 6 Point |
M = Metric |
| 3405W |
3 = 3/8" Drive |
4 = Std Socket |
05 = 12 Point |
W = Whitworth |
|
