Socket Inserts
Wrenches and Sockets
Sockets enclose the fastener head over its full face and are driven through a square drive to DIN 3120 and ISO 1174 by a ratchet, a T-handle or a torque wrench. The hexagon or bi-hexagon profile to DIN 3124 spreads the load across the flats instead of the corners, so tight fasteners can be released without damaging the head. Selection is governed by drive size, across flats size, socket depth (standard or deep) and the drive profile of the fastener. The range holds 571 items, led by Proxxon and Bahco and supported by Wiha, Wera, Knipex and Bernstein.
| Square drive | Nominal size | Sizes in the range | Application |
|---|---|---|---|
| 1/4 inch | 6.3 mm | 4 to 14 mm | precision mechanics, electronics and equipment assembly |
| 3/8 inch | 10 mm | 6 to 24 mm | medium torque, maintenance and equipment building |
| 1/2 inch | 12.5 mm | 8 to 34 mm | machine and plant assembly |
| 3/4 inch | 20 mm | 22 to 50 mm | large fasteners in steel and plant construction |
Typical applications: assembly work with a defined tightening torque on a torque wrench; control cabinet building and tightening of earth bolts; maintenance of production machinery and conveyor systems; construction of test rigs and fixtures; precision mechanics and device repair with 1/4 inch sockets; powered driving with a drill or cordless screwdriver through matching adapters.
