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Bosses-Spacers

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Hepfner Racing Products offers a wide range of machined components. We can also custom make items to your specifications with our in house machine shop. Call or send us a print today.

King Pin Bosses

Picture for category King Pin Bosses

Threaded Tube Ends

Picture for category Threaded Tube Ends

Spacer Kits

Picture for category Spacer Kits

Titanium Bosses

Picture for category Titanium Bosses

1/2" OD x 1/4-20 Thread

Picture for category 1/2" OD x 1/4-20 Thread

1/2" OD x 1/4-28 Thread

Picture for category 1/2" OD x 1/4-28 Thread

5/8" OD x 5/16-18 Thread

Picture for category 5/8" OD x 5/16-18 Thread

5/8" OD x 5/16-24 Thread

Picture for category 5/8" OD x 5/16-24 Thread

5/8" OD x 3/8-16 Thread

Picture for category 5/8" OD x 3/8-16 Thread

5/8" OD x 3/8-24 Thread

Picture for category 5/8" OD x 3/8-24 Thread

5/8" OD x 7/16-20 Thread

Picture for category 5/8" OD x 7/16-20 Thread

3/4" OD x 7/16-14 Thread

Picture for category 3/4" OD x 7/16-14 Thread

3/4" OD x 7/16-20 Thread

Picture for category 3/4" OD x 7/16-20 Thread

3/4" OD x 1/2-13 Thread

Picture for category 3/4" OD x 1/2-13 Thread

3/4" OD X 1/2-20 Thread

Picture for category 3/4" OD X 1/2-20 Thread

1/2" OD x 3/8" ID Thru

Picture for category 1/2" OD x 3/8" ID Thru

1/2" OD x 5/16" ID Thru

Picture for category 1/2" OD x 5/16" ID Thru

1/2" OD x 1/4" ID Thru

Picture for category 1/2" OD x 1/4" ID Thru

1/2" OD x 3/16" ID Thru

Picture for category 1/2" OD x 3/16" ID Thru

5/8" OD x 7/16" ID Thru

Picture for category 5/8" OD x 7/16" ID Thru

5/8" OD x 3/8" ID Thru

Picture for category 5/8" OD x 3/8" ID Thru

5/8" OD x 5/16" ID Thru

Picture for category 5/8" OD x 5/16" ID Thru

3/4" OD x 1/2" ID Thru

Picture for category 3/4" OD x 1/2" ID Thru

3/4" OD x 7/16" ID Thru

Picture for category 3/4" OD x 7/16" ID Thru

7/8" OD x 5/8" ID Thru

Picture for category 7/8" OD x 5/8" ID Thru

1.0" OD x 3/4" ID Thru

Picture for category 1.0" OD x 3/4" ID Thru

Pinch Tube Bosses

Picture for category Pinch Tube Bosses

Specialty Bosses

Picture for category Specialty Bosses
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Rod End Boss RH 3/4" Thread, Fits 1.25" OD, 0.083 Wall

HRP3217W-RH
$9.75
Picture of Boss .812 Long .312 Thru, Material .625" x .156" Wall 4130

Boss .812 Long .312 Thru, Material .625" x .156" Wall 4130

HRP3229
$2.05
Picture of Boss .500 Long .26 Thru, Material .500" OD x .120" 4130

Boss .500 Long .26 Thru, Material .500" OD x .120" 4130

HRP3232
$2.05
Picture of Boss .500 Long .315 Thru, Material .500" ID x .120" Wall 4130

Boss .500 Long .315 Thru, Material .500" ID x .120" Wall 4130

HRP3233
$1.95
Picture of Boss 1" Long 3/8 ID Thru, Material .625" OD x .120" Wall 4130

Boss 1" Long 3/8 ID Thru, Material .625" OD x .120" Wall 4130

HRP3404W-1
$7.00
Picture of Boss 1" Long 3/8 ID Thru, Material .625" OD x .120" Wall Stainless Steel

Boss 1" Long 3/8 ID Thru, Material .625" OD x .120" Wall Stainless Steel

HRP3404W-SS
$8.00
Picture of Spacer, Aluminum 0.060 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.060 Long, 0.250" ID X 0.500" OD

HRP5370A
$1.80
Picture of Spacer, Aluminum 0.090" Long, 0.250" ID X 0.500" OD,

Spacer, Aluminum 0.090" Long, 0.250" ID X 0.500" OD,

HRP5371A
$1.80
Picture of Spacer, Aluminum 0.125 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.125 Long, 0.250" ID X 0.500" OD

HRP5372A
$1.80
Picture of Spacer, Aluminum 0.156 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.156 Long, 0.250" ID X 0.500" OD

HRP5373A
$1.80
Picture of Spacer, Aluminum 0.187 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.187 Long, 0.250" ID X 0.500" OD

HRP5374A
$1.80
Picture of Spacer, Aluminum 0.218 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.218 Long, 0.250" ID X 0.500" OD

HRP5375A
$2.25
Picture of Spacer, Aluminum 0.250 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.250 Long, 0.250" ID X 0.500" OD

HRP5376A
$2.25
Picture of Spacer, Aluminum 0.281 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.281 Long, 0.250" ID X 0.500" OD

HRP5377A
$2.25
Picture of Spacer, Aluminum 0.281 Long

Spacer, Aluminum 0.281 Long

HRP5377B
$2.25
Picture of Spacer, Aluminum 0.312 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.312 Long, 0.250" ID X 0.500" OD

HRP5378A
$2.25
Picture of Spacer, Aluminum 0.375 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.375 Long, 0.250" ID X 0.500" OD

HRP5379A
$2.25
Picture of Spacer, Aluminum 0.406 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.406 Long, 0.250" ID X 0.500" OD

HRP5380A
$2.75
Picture of Spacer, Aluminum 0.437 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.437 Long, 0.250" ID X 0.500" OD

HRP5381A
$2.75
Picture of Spacer, Aluminum 0.484 Long, 0.250" X 0.500" OD

Spacer, Aluminum 0.484 Long, 0.250" X 0.500" OD

HRP5382A
$2.75
Picture of Spacer, Aluminum 0.500" Long, 0.250" ID X 0.500" ID

Spacer, Aluminum 0.500" Long, 0.250" ID X 0.500" ID

HRP5383A
$2.75
Picture of Spacer, Aluminum 0.343 Long, 0.250" ID X 0.500" OD

Spacer, Aluminum 0.343 Long, 0.250" ID X 0.500" OD

HRP5384A
$2.75
Picture of Boss 2 3/8" Long 1/2 ID Thru, Material 0.750 OD x 0.120, 4130

Boss 2 3/8" Long 1/2 ID Thru, Material 0.750 OD x 0.120, 4130

HRP3415Y
$9.75
Picture of Boss 1 1/8" Long 5/16 x 24, Material 0.625 OD x 0.187, 4130

Boss 1 1/8" Long 5/16 x 24, Material 0.625 OD x 0.187, 4130

HRP3405B
$7.00
Picture of Boss 3" Long 1/2 ID Thru, Material 0.750 OD x 0.120, 4130

Boss 3" Long 1/2 ID Thru, Material 0.750 OD x 0.120, 4130

HRP3418Y
$10.50
Picture of Rod End Boss LH 5/8 Thread, Fits 1.125" OD, 0.058" Wall, No Shoulder

Rod End Boss LH 5/8 Thread, Fits 1.125" OD, 0.058" Wall, No Shoulder

HRP3201W-LH
$10.00
Picture of Rod End Boss RH 5/8 Thread, Fits 1.125" OD, 0.058" Wall, No Shoulder

Rod End Boss RH 5/8 Thread, Fits 1.125" OD, 0.058" Wall, No Shoulder

HRP3202W-RH
$10.00
Picture of Boss 0.875" Long 0.385 Thru, Material 0.625" x 0.120" Wall, 4130

Boss 0.875" Long 0.385 Thru, Material 0.625" x 0.120" Wall, 4130

HRP3230
$2.05
Picture of Boss 1 5/8" Long 7/16 X 20, Material 0.625 OD x 0.120, 4130

Boss 1 5/8" Long 7/16 X 20, Material 0.625 OD x 0.120, 4130

HRP3409G
$8.00
Picture of Boss 2" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130, Back Drilled

Boss 2" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130, Back Drilled

HRP3412E-BD
$12.00
Picture of Boss 2 1/2" Long 1/2 ID Thru, Material 0.750 OD x 0.120, 4130

Boss 2 1/2" Long 1/2 ID Thru, Material 0.750 OD x 0.120, 4130

HRP3416Y
$10.00
Picture of Jacobs Ladder Spacer

Jacobs Ladder Spacer

HRP5390
$2.50
Picture of Boss 3.00 Long

Boss 3.00 Long

HRP3258-2375
$7.75
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No warranty. Product, and each part thereof, is sold as is. Racing is a dangerous activity - the user shall determine the suitability and safety of the product for its intended use.
There is no warranty expressed or implied. Glenn Hepfner Inc. / Hepfner Racing Products (HRP) will not be liable for any loss, damage, death or injury arising from the use of these products.
The user assumes all responsibility and risk in connection there within.

Copyright © 2025 Hepfner Racing Products. All rights reserved.