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About Durometer Hardness Scales

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Load-Rated Threaded Bumpers

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Select these bumpers for applications that require specific load capacities. All are reinforced with a 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 and conveyors. Mount these bumpers on a threaded stud.

Bumpers with a soft and extra-soft rating offer cushioning. The softer the bumper, the more it cushions. Bumpers with a medium and medium-soft rating offer a balance of cushioning and impact resistance. Bumpers with a hard rating withstand high levels of impact.

Rubber bumpers are abrasion resistant. Those with a soft rating can be used outdoors.

Polyurethane bumpers have better abrasion resistance than rubber bumpers. They won't become brittle and crack when exposed to ozone.

Buna-N bumpers resist abrasion, oil, and grease.

3D CAD models availableFor technical drawings and 3-D models, click on a part number.

Thread

Size Pitch Dp. OD Ht. Max.

Load, lbs. Temp.

Range, °F For Use

Outdoors Hardness

Rating Hardness Nonmarking Color Each

Style 1

Rubber with Steel Base Plate

4-40 __ 1/8" 9/32" 5/16" 0.3 -10° to 150° Yes Soft Durometer 19A Yes Black 93115K92 $6.42

6-32 __ 1/8" 13/32" 1/2" 0.6 -10° to 150° Yes Soft Durometer 19A Yes Black 93115K93 6.87

8-32 __ 1/8" 13/32" 1/2" 0.6 -10° to 150° Yes Soft Durometer 19A Yes Black 93115K94 7.13

1/4"-20 __ 1/4" 1" 1/2" 200 -20° to 150° No Medium Durometer 55A Yes Black 93115K211 2.50

1/4"-20 __ 1/4" 1" 3/4" 140 -20° to 150° No Medium Durometer 55A Yes Black 93115K221 2.80

5/16"-18 __ 3/8" 1" 1" 190 -20° to 150° No Medium Durometer 55A Yes Black 93115K231 3.20

5/16"-18 __ 3/8" 1 1/2" 3/4" 440 -20° to 150° No Medium Durometer 55A Yes Black 93115K241 5.88

5/16"-18 __ 3/8" 1 1/2" 1" 400 -20° to 150° No Medium Durometer 55A Yes Black 93115K251 6.52

3/8"-16 __ 3/8" 1 1/2" 1" 400 -20° to 150° No Medium Durometer 55A Yes Black 93115K261 6.60

3/8"-16 __ 3/8" 2" 3/4" 1,040 -20° to 150° No Medium Durometer 55A Yes Black 93115K271 6.98

3/8"-16 __ 3/8" 2" 1 5/8" 670 -20° to 150° No Medium Durometer 55A Yes Black 93115K481 12.08

M3 0.5 mm 3mm 8mm 8mm 7 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K311 2.95

M3 0.5 mm 3mm 8mm 8mm 12 -40° to 170° No Medium Durometer 55A Yes Black 9377K312 2.95

M3 0.5 mm 3mm 8mm 8mm 30 -40° to 170° No Hard Durometer 70A Yes Black 9377K313 2.95

M3 0.5 mm 3mm 8mm 13mm 11 -40° to 170° No Medium Durometer 55A Yes Black 9377K315 2.95

M3 0.5 mm 3mm 8mm 13mm 30 -40° to 170° No Hard Durometer 70A Yes Black 9377K316 2.95

M4 0.7 mm 4mm 10mm 10mm 11 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K317 2.07

M4 0.7 mm 4mm 10mm 10mm 13 -20° to 150° No Medium Durometer 55A Yes Black 93115K371 2.06

M4 0.7 mm 4mm 10mm 10mm 45 -40° to 170° No Hard Durometer 70A Yes Black 9377K318 2.07

M4 0.7 mm 4mm 10mm 15mm 15 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K319 2.64

M4 0.7 mm 4mm 10mm 15mm 35 -40° to 170° No Hard Durometer 70A Yes Black 9377K322 2.64

M4 0.7 mm 4mm 15mm 15mm 30 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K323 2.07

M4 0.7 mm 4mm 15mm 15mm 50 -20° to 150° No Medium Durometer 55A Yes Black 93115K381 2.07

M4 0.7 mm 4mm 15mm 15mm 85 -40° to 170° No Hard Durometer 70A Yes Black 9377K324 2.07

M4 0.7 mm 4mm 15mm 20mm 30 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K325 2.30

M4 0.7 mm 4mm 15mm 20mm 60 -20° to 150° No Medium Durometer 55A Yes Black 93115K391 2.30

M4 0.7 mm 4mm 15mm 20mm 130 -40° to 170° No Hard Durometer 70A Yes Black 9377K326 2.30

M6 1 mm 6mm 20mm 15mm 65 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K327 3.02

M6 1 mm 6mm 20mm 15mm 100 -40° to 170° No Medium Durometer 55A Yes Black 9377K328 3.02

M6 1 mm 6mm 20mm 15mm 150 -40° to 170° No Hard Durometer 70A Yes Black 9377K329 3.02

M6 1 mm 6mm 20mm 20mm 80 -40° to 170° No Medium Durometer 55A Yes Black 9377K332 3.21

M6 1 mm 6mm 20mm 20mm 180 -40° to 170° No Hard Durometer 70A Yes Black 9377K333 3.21

M6 1 mm 6mm 20mm 25mm 60 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K334 3.41

M6 1 mm 6mm 20mm 25mm 85 -40° to 170° No Medium Durometer 55A Yes Black 9377K335 3.41

M6 1 mm 6mm 20mm 25mm 230 -40° to 170° No Hard Durometer 70A Yes Black 9377K336 3.41

M6 1 mm 6mm 25mm 15mm 130 -20° to 150° No Medium Durometer 55A Yes Black 93115K421 3.21

M6 1 mm 6mm 25mm 15mm 360 -40° to 170° No Hard Durometer 70A Yes Black 9377K338 3.21

M6 1 mm 6mm 25mm 20mm 120 -20° to 150° No Medium Durometer 55A Yes Black 93115K431 3.39

M6 1 mm 6mm 25mm 20mm 310 -40° to 170° No Hard Durometer 70A Yes Black 9377K341 3.39

M6 1 mm 6mm 25mm 30mm 65 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K342 3.64

M6 1 mm 6mm 25mm 30mm 110 -20° to 150° No Medium Durometer 55A Yes Black 93115K441 3.65

M6 1 mm 6mm 25mm 30mm 260 -40° to 170° No Hard Durometer 70A Yes Black 9377K343 3.64

M8 1.25 mm 8mm 30mm 15mm 160 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K344 4.12

M8 1.25 mm 8mm 30mm 15mm 200 -20° to 150° No Medium Durometer 55A Yes Black 93115K451 4.12

M8 1.25 mm 8mm 30mm 15mm 580 -40° to 170° No Hard Durometer 70A Yes Black 9377K345 4.12

M8 1.25 mm 8mm 30mm 20mm 120 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K346 5.53

M8 1.25 mm 8mm 30mm 20mm 220 -40° to 170° No Medium Durometer 55A Yes Black 9377K347 5.53

M8 1.25 mm 8mm 30mm 20mm 420 -40° to 170° No Hard Durometer 70A Yes Black 9377K348 5.53

M8 1.25 mm 8mm 30mm 30mm 130 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K349 6.41

M8 1.25 mm 8mm 30mm 30mm 170 -40° to 170° No Medium Durometer 55A Yes Black 9377K351 6.41

M8 1.25 mm 8mm 30mm 30mm 360 -40° to 170° No Hard Durometer 70A Yes Black 9377K352 6.41

M8 1.25 mm 8mm 30mm 40mm 170 -40° to 170° No Medium Durometer 55A Yes Black 9377K354 7.71

M8 1.25 mm 8mm 40mm 20mm 260 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K356 5.87

M8 1.25 mm 8mm 40mm 20mm 270 -20° to 150° No Medium Durometer 55A Yes Black 93115K461 5.87

M8 1.25 mm 8mm 40mm 20mm 1,060 -40° to 170° No Hard Durometer 70A Yes Black 9377K357 5.87

M8 1.25 mm 8mm 40mm 30mm 350 -20° to 150° No Medium Durometer 55A Yes Black 93115K511 6.74

M8 1.25 mm 8mm 40mm 30mm 630 -40° to 170° No Hard Durometer 70A Yes Black 9377K359 6.74

M8 1.25 mm 8mm 40mm 40mm 220 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K361 8.18

M8 1.25 mm 8mm 40mm 40mm 400 -20° to 150° No Medium Durometer 55A Yes Black 93115K581 8.17

M8 1.25 mm 8mm 40mm 40mm 700 -40° to 170° No Hard Durometer 70A Yes Black 9377K362 8.18

M10 1.5 mm 10mm 50mm 20mm 580 -20° to 150° No Medium Durometer 55A Yes Black 93115K591 8.17

M10 1.5 mm 10mm 50mm 20mm 600 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K363 8.18

M10 1.5 mm 10mm 50mm 20mm 1,670 -40° to 170° No Hard Durometer 70A Yes Black 9377K364 8.18

M10 1.5 mm 10mm 50mm 30mm 400 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K365 9.68

M10 1.5 mm 10mm 50mm 30mm 550 -20° to 150° No Medium Durometer 55A Yes Black 93115K611 9.68

M10 1.5 mm 10mm 50mm 30mm 1,210 -40° to 170° No Hard Durometer 70A Yes Black 9377K366 9.68

M10 1.5 mm 10mm 50mm 40mm 550 -20° to 150° No Medium Durometer 55A Yes Black 93115K681 11.42

M10 1.5 mm 10mm 50mm 40mm 1,110 -40° to 170° No Hard Durometer 70A Yes Black 9377K368 11.42

M10 1.5 mm 10mm 60mm 30mm 720 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K373 21.49

M10 1.5 mm 10mm 60mm 30mm 1,200 -40° to 170° No Medium Durometer 55A Yes Black 9377K374 21.49

M10 1.5 mm 10mm 70mm 30mm 1,610 -40° to 170° No Medium Durometer 55A Yes Black 9377K384 28.59

M10 1.5 mm 10mm 70mm 40mm 920 -20° to 150° No Medium Durometer 55A Yes Black 93115K691 27.76

M10 1.5 mm 10mm 70mm 55mm 1,010 -20° to 150° No Medium Durometer 55A Yes Black 93115K761 32.28

M12 1.75 mm 12mm 75mm 30mm 1,770 -40° to 170° No Medium Durometer 55A Yes Black 9377K392 26.93

M12 1.75 mm 12mm 75mm 40mm 1,010 -20° to 150° No Medium Durometer 55A Yes Black 93115K771 24.35

M12 1.75 mm 12mm 75mm 40mm 2,060 -40° to 170° No Hard Durometer 70A Yes Black 9377K395 24.35

M12 1.75 mm 12mm 75mm 50mm 980 -20° to 150° No Medium Durometer 55A Yes Black 93115K781 28.48

M16 2 mm 16mm 100mm 40mm 1,820 -20° to 150° No Medium Durometer 55A Yes Black 93115K791 52.35

M16 2 mm 16mm 100mm 40mm 2,110 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K398 52.35

Rubber with Stainless Steel Base Plate

1/4"-20 __ 1/4" 1" 1/2" 200 -20° to 150° No Medium Durometer 55A Yes Black 93115K212 6.99

1/4"-20 __ 1/4" 1" 3/4" 140 -20° to 150° No Medium Durometer 55A Yes Black 93115K222 7.74

5/16"-18 __ 3/8" 1" 1" 190 -20° to 150° No Medium Durometer 55A Yes Black 93115K232 8.20

5/16"-18 __ 3/8" 1 1/2" 3/4" 440 -20° to 150° No Medium Durometer 55A Yes Black 93115K242 15.25

5/16"-18 __ 3/8" 1 1/2" 1" 400 -20° to 150° No Medium Durometer 55A Yes Black 93115K252 16.63

3/8"-16 __ 3/8" 1 1/2" 1" 400 -20° to 150° No Medium Durometer 55A Yes Black 93115K262 16.63

3/8"-16 __ 3/8" 2" 3/4" 1,040 -20° to 150° No Medium Durometer 55A Yes Black 93115K272 20.82

3/8"-16 __ 3/8" 2" 1 5/8" 670 -20° to 150° No Medium Durometer 55A Yes Black 93115K282 31.08

M3 0.5 mm 3mm 8mm 8mm 12 -40° to 170° No Medium Durometer 55A Yes Black 9377K423 5.31

M4 0.7 mm 4mm 10mm 10mm 13 -20° to 150° No Medium Durometer 55A Yes Black 93115K372 3.94

M4 0.7 mm 4mm 15mm 15mm 50 -20° to 150° No Medium Durometer 55A Yes Black 93115K382 3.94

M4 0.7 mm 4mm 15mm 20mm 60 -20° to 150° No Medium Durometer 55A Yes Black 93115K392 4.28

M6 1 mm 6mm 20mm 15mm 100 -40° to 170° No Medium Durometer 55A Yes Black 9377K426 5.57

M6 1 mm 6mm 20mm 25mm 85 -40° to 170° No Medium Durometer 55A Yes Black 9377K428 6.25

M6 1 mm 6mm 25mm 15mm 130 -20° to 150° No Medium Durometer 55A Yes Black 93115K422 5.44

M6 1 mm 6mm 25mm 20mm 120 -20° to 150° No Medium Durometer 55A Yes Black 93115K432 5.77

M6 1 mm 6mm 25mm 30mm 110 -20° to 150° No Medium Durometer 55A Yes Black 93115K442 6.88

M8 1.25 mm 8mm 30mm 15mm 200 -20° to 150° No Medium Durometer 55A Yes Black 93115K452 7.72

M8 1.25 mm 8mm 30mm 20mm 220 -40° to 170° No Medium Durometer 55A Yes Black 9377K429 10.54

M8 1.25 mm 8mm 40mm 20mm 270 -20° to 150° No Medium Durometer 55A Yes Black 93115K462 10.99

M8 1.25 mm 8mm 40mm 30mm 350 -20° to 150° No Medium Durometer 55A Yes Black 93115K512 12.72

M8 1.25 mm 8mm 40mm 40mm 400 -20° to 150° No Medium Durometer 55A Yes Black 93115K582 15.44

M10 1.5 mm 10mm 50mm 20mm 580 -20° to 150° No Medium Durometer 55A Yes Black 93115K592 15.44

M10 1.5 mm 10mm 50mm 30mm 550 -20° to 150° No Medium Durometer 55A Yes Black 93115K612 18.27

M10 1.5 mm 10mm 50mm 40mm 550 -20° to 150° No Medium Durometer 55A Yes Black 93115K682 21.54

M10 1.5 mm 10mm 50mm 50mm 600 -40° to 170° No Medium Durometer 55A Yes Black 9377K433 29.89

M12 1.75 mm 12mm 75mm 30mm 1,770 -40° to 170° No Medium Durometer 55A Yes Black 9377K438 50.59

M12 1.75 mm 12mm 75mm 40mm 1,010 -20° to 150° No Medium Durometer 55A Yes Black 93115K772 45.92

Polyurethane Rubber with Steel Base Plate

4-40 __ 1/8" 9/32" 5/16" 2 60° to 100° No Medium Durometer 48A No Black 93115K81 5.74

6-32 __ 1/8" 13/32" 1/2" 4 60° to 100° No Medium Durometer 48A No Black 93115K82 6.18

8-32 __ 1/8" 13/32" 1/2" 4 60° to 100° No Medium Durometer 48A No Black 93115K83 6.48

1/4"-20 __ 1/4" 5/8" 5/8" 12 60° to 100° No Medium Durometer 48A No Black 93115K84 6.91

5/16"-18 __ 1/4" 1" 3/4" 45 60° to 100° No Medium Durometer 48A No Black 93115K85 8.82

Style 2

Rubber with Steel Base Plate

1/4"-20 __ 1/4" 3/4" 31/32" 22 -40° to 170° No Medium Durometer 55A Yes Black 9377K445 2.54

1/4"-20 __ 1/4" 31/32" 1 1/4" 33 -40° to 170° No Medium Durometer 55A Yes Black 9377K446 4.48

5/16"-18 __ 5/16" 1 1/4" 1 1/2" 45 -40° to 170° No Medium Durometer 55A Yes Black 9377K447 4.92

5/16"-18 __ 5/16" 1 1/2" 1 3/4" 140 -40° to 170° No Medium Durometer 55A Yes Black 9377K448 5.41

3/8"-16 __ 3/8" 1 3/4" 2" 160 -40° to 170° No Medium Durometer 55A Yes Black 9377K449 16.23

3/8"-16 __ 3/8" 2" 2 1/4" 190 -40° to 170° No Medium Durometer 55A Yes Black 9377K451 20.93

M5 0.8 mm 5mm 10mm 10mm 10 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K452 2.62

M5 0.8 mm 5mm 10mm 10mm 13 -40° to 170° No Medium Durometer 55A Yes Black 9377K453 2.62

M5 0.8 mm 5mm 10mm 10mm 25 -40° to 170° No Hard Durometer 70A Yes Black 9377K454 2.62

M6 1 mm 6mm 20mm 15mm 29 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K455 3.15

M6 1 mm 6mm 20mm 24mm 18 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K458 2.74

M6 1 mm 6mm 20mm 24mm 22 -20° to 150° No Medium Durometer 55A Yes Black 9377K71 2.74

M6 1 mm 6mm 20mm 24mm 70 -40° to 170° No Hard Durometer 70A Yes Black 9377K459 2.74

M6 1 mm 6mm 25mm 20mm 42 -40° to 170° No Medium Durometer 55A Yes Black 9377K462 3.40

M6 1 mm 6mm 25mm 20mm 110 -40° to 170° No Hard Durometer 70A Yes Black 9377K463 3.40

M8 1.25 mm 8mm 30mm 30mm 30 -20° to 150° No Medium Durometer 55A Yes Black 9377K72 4.68

M8 1.25 mm 8mm 30mm 30mm 40 -40° to 170° No Medium Soft Durometer 40A Yes Black 9377K464 4.67

M8 1.25 mm 8mm 50mm 61mm 160 -20° to 150° No Medium Durometer 55A Yes Black 9377K75 10.27

M8 1.25 mm 8mm 50mm 61mm 340 -40° to 170° No Hard Durometer 70A Yes Black 9377K477 10.27

M10 1.5 mm 10mm 50mm 68mm 190 -20° to 150° No Medium Durometer 55A Yes Black 9377K76 12.94

M10 1.5 mm 10mm 50mm 68mm 430 -40° to 170° No Hard Durometer 70A Yes Black 9377K479 12.95

M12 1.75 mm 12mm 75mm 89mm 570 -40° to 170° No Hard Durometer 70A Yes Black 9377K486 42.72

Style 3

Polyurethane Rubber with Steel Base Plate

8-32 __ 1/4" 3/4" 1/2" 3 -20° to 160° No Extra Soft Durometer 50 OO No Black 2572K8 7.06

8-32 __ 1/4" 3/4" 1/2" 6 -20° to 160° No Soft Durometer 70 OO No Black 2572K9 6.86

1/4"-20 __ 3/8" 1 1/2" 1" 11 -20° to 160° No Extra Soft Durometer 50 OO No Black 2572K12 9.25

1/4"-20 __ 3/8" 1 1/2" 1" 18 -20° to 160° No Soft Durometer 70 OO No Black 2572K13 8.88

1/4"-20 __ 3/8" 1 3/4" 27/32" 20 -20° to 160° No Extra Soft Durometer 50 OO No Black 2572K15 10.09

1/4"-20 __ 3/8" 1 3/4" 27/32" 35 -20° to 160° No Soft Durometer 70 OO No Black 2572K16 9.54

M4 0.7 mm 7mm 19mm 13mm 3 -20° to 160° No Extra Soft Durometer 50 OO No Black 2572K31 8.65

M4 0.7 mm 7mm 19mm 13mm 6 -20° to 160° No Soft Durometer 70 OO No Black 2572K32 8.30

M6 1 mm 9mm 38mm 25mm 18 -20° to 160° No Soft Durometer 70 OO No Black 2572K42 8.85

M6 1 mm 9mm 45mm 22mm 20 -20° to 160° No Extra Soft Durometer 50 OO No Black 2572K33 10.26

M6 1 mm 9mm 45mm 22mm 35 -20° to 160° No Soft Durometer 70 OO No Black 2572K34 9.70

Style 4

Buna-N Rubber with Steel Base Plate

10-24 __ 3/16" 3/4" 5/8" 24 -20° to 170° No Medium Durometer 55A Yes Black 9377K517 4.95

1/4"-20 __ 1/4" 31/32" 13/16" 95 -20° to 170° No Medium Durometer 55A Yes Black 9377K518 5.78

5/16"-18 __ 5/16" 1 1/4" 1" 200 -20° to 170° No Medium Durometer 55A Yes Black 9377K519 11.45

5/16"-18 __ 5/16" 1 1/2" 1 1/4" 270 -20° to 170° No Medium Durometer 55A Yes Black 9377K521 14.22

3/8"-16 __ 3/8" 1 31/32" 1 11/16" 360 -20° to 170° No Medium Durometer 55A Yes Black 9377K522 19.79

M5 0.8 mm 5mm 19mm 16mm 24 -20° to 170° No Medium Durometer 55A Yes Black 9377K523 5.84

M6 1 mm 6mm 25mm 21mm 95 -20° to 170° No Medium Durometer 55A Yes Black 9377K524 7.22

M8 1.25 mm 8mm 32mm 26mm 200 -20° to 170° No Medium Durometer 55A Yes Black 9377K525 14.88

M8 1.25 mm 8mm 38mm 32mm 270 -20° to 170° No Medium Durometer 55A Yes Black 9377K526 18.07

Buna-N Rubber with Stainless Steel Base Plate

10-24 __ 3/16" 3/4" 5/8" 24 -20° to 170° No Medium Durometer 55A Yes Black 9377K528 11.75

1/4"-20 __ 1/4" 31/32" 13/16" 95 -20° to 170° No Medium Durometer 55A Yes Black 9377K529 14.23

5/16"-18 __ 5/16" 1 1/4" 1" 200 -20° to 170° No Medium Durometer 55A Yes Black 9377K531 30.13