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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 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
$3.00
Picture of Boss 1 3/8" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

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

HRP3407C
$8.40
Picture of Boss 1 5/8" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

Boss 1 5/8" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

HRP3409C
$8.95
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
$8.65
Picture of Boss 1 3/4" Long 7/16 ID Thru, Material 0.625 OD x 0.095, 4130

Boss 1 3/4" Long 7/16 ID Thru, Material 0.625 OD x 0.095, 4130

HRP3410V
$9.20
Picture of Boss 3 1/2" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

Boss 3 1/2" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

HRP3420E
$11.65
Picture of Boss 1 1/8" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

Boss 1 1/8" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

HRP3405E
$7.60
Picture of Boss 1 1/4" Long 7/16 X 20, Material 0.750 OD x 0.250, 4130

Boss 1 1/4" Long 7/16 X 20, Material 0.750 OD x 0.250, 4130

HRP3406D
$7.85
Picture of King Pin Boss, Sprint Car, 4130, 1.50" OD x 0.375" Wall

King Pin Boss, Sprint Car, 4130, 1.50" OD x 0.375" Wall

HRP3000W-150
$29.70
Picture of Boss 1 1/8" Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

Boss 1 1/8" Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

HRP3405X
$7.85
Picture of Boss 1 1/4" Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

Boss 1 1/4" Long 5/16 ID Thru, Material 0.625 OD x 0.156, 4130

HRP3406X
$8.10
Picture of Boss 1 1/2" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

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

HRP3408C
$8.65
Picture of Boss 1 1/2" Long 7/16 X 20, Material 0.625 OD x 0.120, 4130

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

HRP3408G
$8.40
Picture of Boss 2 3/4" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

Boss 2 3/4" Long 3/8 X 24, Material 0.625 OD x 0.156, 4130

HRP3417C
$10.00
Picture of Boss 1 7/8" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

Boss 1 7/8" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

HRP3411W
$9.45
Picture of Pinch Tube 0.50" Long 0.321" Thru

Pinch Tube 0.50" Long 0.321" Thru

HRP3270
$4.60
Picture of Boss 3" Long 3/8 X 16, Material 0.625 OD x 0.156, 4130

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

HRP3418O
$11.10
Picture of King Pin Boss, Sprint Car, 4130, 1.25" OD x 0.250" Wall

King Pin Boss, Sprint Car, 4130, 1.25" OD x 0.250" Wall

HRP3000W-125
$22.45
Picture of Panhard Bar Spud

Panhard Bar Spud

HRP3249
$13.80
Picture of Boss 4 1/2" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

Boss 4 1/2" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

HRP3424E
$12.70
Picture of King Pin Boss, Midget, 4130, 1.25" OD x 0.250" Wall

King Pin Boss, Midget, 4130, 1.25" OD x 0.250" Wall

HRP3000W-M
$19.45
Picture of Mini King Pin Boss 0.625" Thru

Mini King Pin Boss 0.625" Thru

HRP3244
$12.45
Picture of Boss 3" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

Boss 3" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

HRP3418E
$11.10
Picture of Front Axle Shock Boss 1.06" Long

Front Axle Shock Boss 1.06" Long

HRP3245
$13.50
Picture of Aluminum Spacer Kit, 70 Piece, Assorted Lengths, 0.312" ID X 0.625" OD

Aluminum Spacer Kit, 70 Piece, Assorted Lengths, 0.312" ID X 0.625" OD

HRP5365B
$135.00
Picture of Boss 3/4" Long 1/4 ID Thru, Material 0.50 OD x 0.120, 4130

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

HRP3402T
$7.05

Rod End Boss LH 5/8 Thread, Fits 1.00" OD, 0.065" Wall

HRP3214W-LH
$10.00

Rod End Boss RH 5/8 Thread, Fits 1.00" OD, 0.065" Wall

HRP3215W-RH
$10.00
Picture of Boss 1 1/4" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

Boss 1 1/4" Long 1/2 X 20, Material 0.75 OD x 0.156, 4130

HRP3406E
$7.85
Picture of Boss 1 5/8" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

Boss 1 5/8" Long 3/8 ID Thru, Material 0.625 OD x 0.120, 4130

HRP3409W
$8.95
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 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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  • (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.