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MB-21
MB21 Standard Locknut Part Number
This is the most popular series of metric washers that is coupled with KM series metric locknuts. Lockwashers engage a keyway in a shaft or adapter sleeve slot, then locks the accompanying locknut in position by bending one of the washer tabs into the nut’s outside diameter slots.
Features and benefits
- Fast and simple to use mating component to a locknut.
- Specific sizes to accommodate metric applications.
- Simple installation and removal.
- Standard Locknut sets the industry locknut standard
- MB lockwashers have a 25 degree tang angle.
- Can be mounted directly to the shaft or on an adapter sleeve.
- A new lockwasher should be used each time the corresponding KM locknut and assembly is reinstalled.
- Unless otherwise specified, manufactured from AISI grade 1020 series steel.
- Most suitable for applications using cams, clutches, gears, pulleys, sprockets, and other general industry power transmission applications.
| Dimensions | |||
|---|---|---|---|
| R | 4.134 | INCH | Bore |
| E | 4.961 | INCH | Face Diameter |
| B | 5.709 | INCH | Dia. over Tangs |
| S | 0.472 | INCH | Key Width |
| X | 3.957 | INCH | Inside Dia. |
| NOTAN | 17 | INCH | No. of Tangs |
| T | 0.472 | INCH | Tang Width |
| Q | 0.071 | INCH | Material Thickness |
| Weight | 20 | LB/100 | |