Description
The Proto J5521M is a 3/4 in drive, 21 mm, 12-point socket of standard length with a satin finish. Per the manufacturer, 12-point sockets suit stubborn or damaged fasteners and fasteners made from soft materials, and the TorquePlus design engages the fastener flats rather than the corners.
The manufacturer also lists a ball detent design. Per the page, the TorquePlus internal design minimizes fastener rounding and makes it easier to turn worn, rounded or rusted fasteners. Sold as a single socket.
Features
- 3/4 in drive
- 21 mm socket size
- 12-point design, suited to stubborn or damaged fasteners and soft-material fasteners, per the manufacturer
- TorquePlus design engages the fastener flats, not the corners, per the manufacturer
- Radius-corner internal design spreads contact stress over a larger area, per the manufacturer
- Ball detent design
- Standard length, satin finish
Specifications
| Specification | Value |
|---|---|
| Model | J5521M |
| Quantity | 1 piece |
| Type | 12-point socket, standard length |
| Drive size | 3/4 in |
| Socket size | 21 mm |
| Unit of measure | metric |
| Finish | satin |
| Overall length | 2 in |
| Nut depth | 9/16 in |
| Bolt clearance depth | 1-5/16 in |
| Drive end outside diameter | 1-19/64 in |
| Nut end outside diameter | 1-17/64 in |
| Weight | 0.181 kg (0.4 lbs) |
Part numbers
| Manufacturer part number (MPN) | Big Papa SKU |
|---|---|
| J5521M | BP-G-PRO-5521M |
Documents