Semi-Truck Trailer Parts
Get top-notch semi-truck trailer parts at 4 State Trucks. From automatic slack adjusters to air bags and torque arms, we've got what your rig needs. Our parts are known for quality and reliability, making maintenance hassle-free. Looking for fuel tank straps or air tanks? We've got those too. Shop now and keep your truck in peak condition.
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3 X 16.5 Inch Fabricated Equalizer Hutch - Replaces 1615801
AUTOMANN USA
$57.9911.75 Inch C-C Fabricated Equalizer Hutch With 3.25 Inch Hole * High Quality Equalizer Hutch* 16.50 Inch Overall Length* 11.750 Inch Center To Center* Equalizer Hole: 1.125 Inch* For Poly Use* Equalizer Type: Fab* Bushing Included* Hole Size ( C ): 3.250...$57.99 -
6 Inch Gunite Type Slack Adjuster For Welded Clevis Chamber
AUTOMANN USA
$93.126 Inch Gunite Type Slack Adjuster W/ 1.5 X 5.5 Inch, 28 Spline Arm For Welded Clevis Chamber * High Quality Slack Adjuster* Slack Type: Automatic-Gunite Type* For Welded Clevis Chamber* With 1.30 Inch Center To Center* 5 1/2 Inch Arm* Spline Count: 28*...$93.12 -
Steel Air Tank For Trailer 9.5 Inch Diameter 1488 Cubic Inch Volume, 3/4 Inch Ports & 1/4 Inch Drain - Black
BESTFIT TRUCK PARTS
$179.991488 Cubic Inch Truck & Trailer Air Tank * High Quality Air Tank* Made Of Steel* Attribute Value* Bracket Orientation Type 4* 9.5 Diameter* 22.50 Inch Length* 1488 Cubic Inch Volume* Dual Ports* 27.50 Inch Overall Length* Front Port (F1) 3/4 Inch NPT*...$179.99 -
BESTfit Height Control Valve - Replaces 171-H00500CAOE, E-14351, E14351
BESTFIT TRUCK PARTS
$139.99BESTfit Air Brake Link Height Control Leveling Valve * High Quality Leveling Valve* Trailer Only* Hadley Type * Sold Individually*** High Quality Aftermarket Replacement Part (Not OEM)****** Replaces 171-H00500CAOE, E-14351, E14351** This Item Ships...$139.99 -
13 Inch Suspender Spring For Brake Hoses On Trailer
AUTOMANN USA
$6.51Suspender Spring * Made Of High Quality Suspender Spring* 13 Inch* For Brake Hoses On Trailer* Replaces OEM # F9990990-07, F999099007, GT-5002, GT5002, HALDX-11602, HALDX11602, JN104718, M-3057, M3057, 09-019-028, 09-019-028-ZY96, 09019028ZY96, 1013425,...$6.51 -
12 X 29.5 Inch Air Tank For Trailer
BESTFIT TRUCK PARTS
$179.9912 Inch Diameter Air Tank * High Quality Air Tank* 12 Inch Diameter x 29.50 Inch Length* 2 Port* Sold Individually* Warranty On Air Tanks Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement Part (Not...$179.99 -
King Pin .500 SAE Plate Mushroom
AUTOMANN USA
$80.29King Pin * High Quality King Pin* .500 Inch Plate Mushroom* Sold Individually* Warranty On King Pin Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement Part (Not OEM)***** This Item Ships Direct From...$80.29 -
King Pin .375 Inch SAE Plate Mushroom
AUTOMANN USA
$65.98King Pin SAE * High Quality King Pin* .375 Inch Plate Mushroom* Sold Individually* Warranty On King Pin Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement Part (Not OEM)**** This Item Is Special Order...$65.98 -
6 Inch 1.5-10 Spline Air Brake Slack Adjuster Straight
AUTOMANN USA
$74.04Slack Adjuster * High Quality Slack Adjuster* Includes:- Anchor Bracket Plate - Flat Stud - Bracket Kit* Automatic- Haldex Type* 6 Inch Arm Length* For Trailer Axle With 16.5 Inch Brake* Sold Individually* Warranty On Slack Adjuster Against Defects In...$74.04 -
6 Inch 1.5-28 Spline Air Brake Slack Adjuster Straight
BESTFIT TRUCK PARTS
$65.07Slack Adjuster * High quality automatic adjuster* Spline: 1.5 inches - 28* 6 inch arm length* Type: unhanded* Chamber Size: 30* Sold Individually* Warranty on slack adjuster against defects in workmanship & material from date of purchase*** High quality...$65.07 -
Brake Automatic Slack Adjuster 1.5-28 Spline 5.5 Inch Straight
BESTFIT TRUCK PARTS
$71.49Auto Slack Adjuster Merritor Style 5.5 Inch Straight Arm * High quality automatic adjuster* Type: Unhanded* Chamber size: 24, 30* Sold Individually* Warranty on slack adjuster against defects in workmanship & material from date of purchase*** High...$71.49 -
Trailer Axle Slack Adjuster 1.5-28 Spline 5.5 Inch Straight
BESTFIT TRUCK PARTS
$65.07Slack Adjuster * High quality Automatic Adjuster* 5.5 inch * Type: Trailer axle* Bracket type: plate and flat stud* 16.5 inch brake* Sold Individually* Warranty on slack adjuster against defects in workmanship & material from date of purchase*** High...$65.07