About Durometer Hardness Scales
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Threaded Bumpers

Mount these bumpers on a threaded stud. All are reinforced with a steel core or base plate for strength. Often used as feet, spacers, and vibration dampers, they absorb shock to prevent damage to equipment and surfaces. They're also good for starting and stopping motion on automated machines. All of these bumpers can be used outdoors.
Bumpers with a soft rating offer cushioning.
Bumpers with a medium and medium-soft rating offer a balance of cushioning and impact resistance. The softer the bumper, the more it cushions.
Bumpers with an extra-hard, hard, and medium-hard rating withstand high levels of impact. The harder the bumper, the more impact it withstands.
Buna-N bumpers resist abrasion, oil, and grease.
Neoprene bumpers have good abrasion resistance.
Polyurethane bumpers have better abrasion resistance than neoprene bumpers. They won't become brittle and crack when exposed to ozone.
For technical drawings and 3-D models, click on a part number.


Thread | Each | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Size | Dp. | OD | Ht. | Temp. Range, °F | For Use Outdoors | Hardness Rating | Hardness | Nonmarking | Color | 1-11 | 12-Up | |
Buna-N Rubber with Steel Core | ||||||||||||
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -60° to 175° | Yes | Medium Soft | Durometer 40A | Yes | White | 0000000 | 000000 | 000000 |
Neoprene Rubber with Steel Core | ||||||||||||
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Hard | Durometer 75A | No | Black | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium Soft | Durometer 40A | No | Black | 0000000 | 00000 | 00 |
Polyurethane Rubber with Steel Core | ||||||||||||
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Extra Hard | Durometer 95A | No | Black | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Hard | Durometer 85A | No | Red | 0000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium | Durometer 50A | No | Red | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium Hard | Durometer 60A | No | Black | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium Soft | Durometer 40A | No | Red | 000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Soft | Durometer 30A | No | Red | 00000000 | 00000 | 00 |