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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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Picture of Boss 2 3/8" Long 5/16 ID Thru, Material 0.50 OD x 0.095, 4130

Boss 2 3/8" Long 5/16 ID Thru, Material 0.50 OD x 0.095, 4130

HRP3415S
$10.30
Picture of Boss 2 3/8 Long 1/4 ID Thru, Material 0.50 OD x 0.120, 4130

Boss 2 3/8 Long 1/4 ID Thru, Material 0.50 OD x 0.120, 4130

HRP3415T
$10.55
Picture of Boss 2 3/8" Long 3/16 ID Thru, Material 0.50 OD x 0.156, 4130

Boss 2 3/8" Long 3/16 ID Thru, Material 0.50 OD x 0.156, 4130

HRP3415U
$10.55
Picture of Boss 2 3/8 Long 7/16 ID Thru, Material 0.625 OD x 0.095, 4130

Boss 2 3/8 Long 7/16 ID Thru, Material 0.625 OD x 0.095, 4130

HRP3415V
$10.55
Picture of Boss 2 3/8" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

Boss 2 3/8" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

HRP3415W
$10.55
Picture of Boss 2 3/8 Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

Boss 2 3/8 Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

HRP3415X
$10.55
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
$10.55
Picture of Boss 2 3/8 Long 3/4 ID Thru, Material 1.00 OD x 0.120, 4130

Boss 2 3/8 Long 3/4 ID Thru, Material 1.00 OD x 0.120, 4130

HRP3415YY
$10.55
Picture of Boss 2 3/8 Long 7/16 ID Thru, Material 0.750 OD x 0.156, 4130

Boss 2 3/8 Long 7/16 ID Thru, Material 0.750 OD x 0.156, 4130

HRP3415Z
$10.55
Picture of Boss 2 3/8 Long 5/8 ID Thru, Material 0.875 OD x 0.120, 4130

Boss 2 3/8 Long 5/8 ID Thru, Material 0.875 OD x 0.120, 4130

HRP3415ZZ
$11.90
Picture of Boss 2 1/2" Long 1/4 x 28, Material 0.50 OD x 0.156, 4130

Boss 2 1/2" Long 1/4 x 28, Material 0.50 OD x 0.156, 4130

HRP3416A
$10.55
Picture of Boss 2 1/2" Long 5/16 x 24, Material 0.625 OD x 0.187, 4130

Boss 2 1/2" Long 5/16 x 24, Material 0.625 OD x 0.187, 4130

HRP3416B
$10.55
Picture of Boss 2 1/2" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

Boss 2 1/2" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

HRP3416C
$9.75
Picture of Boss 2 1/2" Long 7/16 X 20, Material 0.75 OD x 0.250, 4130

Boss 2 1/2" Long 7/16 X 20, Material 0.75 OD x 0.250, 4130

HRP3416D
$10.55
Picture of Boss 2 1/2" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

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

HRP3416E
$10.55
Picture of Boss 2 1/2" Long 7/16 X 20, Material 0.625 OD x 0.120, 4130

Boss 2 1/2" Long 7/16 X 20, Material 0.625 OD x 0.120, 4130

HRP3416G
$10.55
Picture of Boss 2 1/2" Long 1/4 X 20, Material 0.50 OD x 0.156, 4130

Boss 2 1/2" Long 1/4 X 20, Material 0.50 OD x 0.156, 4130

HRP3416M
$10.55
Picture of Boss 2 1/2" Long 5/16 X 18, Material 0.625 OD x 0.187, 4130

Boss 2 1/2" Long 5/16 X 18, Material 0.625 OD x 0.187, 4130

HRP3416N
$10.55
Picture of Boss 2 1/2" Long 3/8 X 16, Material 0.625 OD x 0.156, 4130

Boss 2 1/2" Long 3/8 X 16, Material 0.625 OD x 0.156, 4130

HRP3416O
$10.55
Picture of Boss 2 1/2" Long 7/16 X 14, Material 0.75 OD x 0.250, 4130

Boss 2 1/2" Long 7/16 X 14, Material 0.75 OD x 0.250, 4130

HRP3416P
$10.55
Picture of Boss 2 1/2" Long 1/2 X 13, Material 0.75 OD x 0.156 ,4130

Boss 2 1/2" Long 1/2 X 13, Material 0.75 OD x 0.156 ,4130

HRP3416Q
$10.55
Picture of Boss 2 1/2" Long 3/8 ID Thru, Material 0.50 OD x 0.065, 4130

Boss 2 1/2" Long 3/8 ID Thru, Material 0.50 OD x 0.065, 4130

HRP3416R
$10.80
Picture of Boss 2 1/2" Long 5/16 ID Thru, Material 0.50 OD x 0.095, 4130

Boss 2 1/2" Long 5/16 ID Thru, Material 0.50 OD x 0.095, 4130

HRP3416S
$10.55
Picture of Boss 2 1/2" Long 1/4 ID Thru, Material 0.50 OD x 0.120, 4130

Boss 2 1/2" Long 1/4 ID Thru, Material 0.50 OD x 0.120, 4130

HRP3416T
$10.80
Picture of Boss 2 1/2" Long 3/16 ID Thru, Material 0.50 OD x 0.156, 4130

Boss 2 1/2" Long 3/16 ID Thru, Material 0.50 OD x 0.156, 4130

HRP3416U
$10.80
Picture of Boss 2 1/2" Long 7/16 ID Thru, Material 0.625 OD x 0.095, 4130

Boss 2 1/2" Long 7/16 ID Thru, Material 0.625 OD x 0.095, 4130

HRP3416V
$10.80
Picture of Boss 2 1/2" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

Boss 2 1/2" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

HRP3416W
$10.80
Picture of Boss 2 1/2" Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

Boss 2 1/2" Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

HRP3416X
$10.80
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
$10.80

Rod End Boss LH 5/8 Thread

HRP3218W-LH
$10.55

Rod End Boss RH 5/8 Thread

HRP3219W-RH
$10.55
Picture of Jacobs Ladder Spacer

Jacobs Ladder Spacer

HRP5390
$2.50
Picture of Boss 3.00 Long

Boss 3.00 Long

HRP3258-2375
$8.40
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  • (Streeter) 1.262.457.5018
  • (GHI) 1.262.670.9444
  • (HRP) 1.262.457.5015
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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 © 2026 Hepfner Racing Products. All rights reserved.