| ASA | Automatic Slack Adjuster | |
| Adjustment | Method whereby the Automatic Slack Adjuster maintains the correct Pre-Set Clearance | |
| Alpha Angle | The installation angle of the Control Arm on the Slack Adjuster | |
| Anchor Bracket | Used with Quick-Fit Control Arms | |
| Anchor Pin | Used with Control Arms which bolt to the Anchor Point | |
| Anchor Point | The bracket which connects the Control Arm of the Slack Adjuster to the vehicle | |
| Camshaft | Connects the Slack Adjuster worm wheel to the brake shoes | |
| Clevis Bush | The bush in the Housing where the actuator mates with the Slack Adjuster | |
| Control Arm | The rotating arm connecting the Cover Plate to the Anchor Point | |
| Control Unit | Combination of Cover Plate, Control Arm, Alpha Angle (ASA only) and Pre-Set Clearance | |
| Cover Plate | Metal pressing which is screwed on to the Housing to protect the Mechanism | |
| Fitting Kit | Loose parts supplied with the Slack Adjuster | |
| Grease Nipple | All MEI Slack Adjusters are fitted with Grease Nipple to lubricate the Mechanism | |
| Grommet | Plastic insert housed in Peg Bolt type Control Arms | |
| Hex Nut | The 12mm nut which rotates as the Mechanism adjusts, being part of the Worm Shaft | |
| Housing | Cast section which contains the Mechanism and extends to hold the Clevis Bush | |
| Inclination | With Cover Plate facing and Hex Nut on your left, this is the angle of the Housing, taken from the vertical | |
| MSA | Manual Slack Adjuster | |
| Mechanism | The internal components of the Slack Adjuster which maintain the Pre-Set Clearance of the brake system | |
| OEM | Original Equipment Manufacturer | |
| Offset | With Hex Nut facing, this is the distance from centre of the Hex Nut to centre of the Housing where the Clevis Bush sits, taken from the vertical | |
| Peg Bolt | Used with Control Arms incorporating a Grommet in the Anchor Point | |
| Pre-Set Clearance | The distance between brake lining and brake drum specified by the vehicle manufacturer | |
| Quick-Fit | Common Anchor Point type on trailers where the Control Arm sits in the slot of the Anchor Bracket | |
| S-ASA | Self-setting Automatic Slack Adjuster | |
| Spline | The mating teeth of the Camshaft and Slack Adjuster | |
| Wear Indicator | Pointer which is fixed to and rotates with the Camshaft, showing brake lining wear | |
| Worm Shaft | Part of the Mechanism which mates with the Worm Wheel and includes the Hex Nut | |
| Worm Wheel | Part of the Mechanism which mates with the Worm Shaft and Camshaft |