Peterbilt 388 Frame Crossmembers & Covers

Product
Qty in Cart
Quantity
Price
Subtotal

Brake Kit For Unlined Brake Shoe - E7242

AFTERMARKET

MSRP:

$81.99

Was:

Brake Kit For Unlined Brake Shoe Replaces E7242* High Quality Brake Kit* Dimensions: - 16.50 Inch Drum Diameter - 7 Inch Shoe Width* Kit For 1 Wheel Only* Components Not Available Separately* Made In...

09-05170163

SKU:

09-05170163

Truck Class:

Universal

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$81.99

Was:

Qty in Cart: 0

Price:

MSRP:

$81.99

Was:

Subtotal:
Joint Strap Kit Fits 1.188 Inch Bearing Cap - 37028X

AUTOMANN USA

MSRP:

$8.88

Was:

Joint Strap Kit Fits 1.188 Inch Bearing Cap Replaces 37028X* High Quality Joint Strap Kit* 1.188 Inch C/L To C/L* Sold Individually* Warranty On Joint Strap Kits Against Defects In Workmanship &...

09-05210017

SKU:

09-05210017

Truck Class:

Universal

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$8.88

Was:

Qty in Cart: 0

Price:

MSRP:

$8.88

Was:

Subtotal:
Lock Joint Strap For SPL Type U-Joint Models - 210498741, 98741

AUTOMANN USA

MSRP:

$3.81

Was:

2.312 Inch C To C Joint Lock Strap with 5/16 Inch Bolt Holes* High Quality Joint Lock Strap* Dimensions: - 3.030 Inch Length - 2.3 Inch C To C* 2.312 Inch C/L To C/L With 5/16 Inch Bolt Holes *...

09-05210019

SKU:

09-05210019

Material Options:

Steel

Truck Class:

Universal

Length Options:

3 Inch

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$3.81

Was:

Qty in Cart: 0

Price:

MSRP:

$3.81

Was:

Subtotal:
Camshaft Bushing 1.63 ID X 1.88 OD X 1.18 Inch

AUTOMANN USA

MSRP:

$3.80

Was:

1.63 ID X 1.88 OD X 1.18 Inch Camshaft Bushing* High Quality Camshaft Bushing* Dimensions: - 1.630 Inch ID - 1.88 Inch OD - 1.18 Inch Length* Sold Individually* Warranty On Camshaft Bushings Against...

09-05170166

SKU:

09-05170166

Material Options:

Steel

Truck Class:

Universal

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$3.80

Was:

Qty in Cart: 0

Price:

MSRP:

$3.80

Was:

Subtotal:
Joint Strap Kit Fits Bearing Cap - KT117, 39418X

AUTOMANN USA

MSRP:

$9.24

Was:

Universal Joint Strap Kit Fits Bearing Cap Replaces KT117, 39418X* High Quality Joint Strap Kit* Sold Individually* Warranty On Joint Strap Kits Against Defects In Workmanship & Material From Date Of...

09-05210012

SKU:

09-05210012

Material Options:

Steel

Truck Class:

Universal

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$9.24

Was:

Qty in Cart: 0

Price:

MSRP:

$9.24

Was:

Subtotal:
Joint Strap Kit Fits 1.375 Inch Bearing Cap - KIT118. 39428X

AUTOMANN USA

MSRP:

$12.71

Was:

Joint Strap Kit Fits 1.375 Inch Bearing Cap Replaces KIT118. 39428X* High Quality Joint Strap Kit* 1.914 Inch C/L To C/L* Sold Individually* Warranty On Joint Strap Kits Against Defects In...

09-05210016

SKU:

09-05210016

Truck Class:

Universal

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$12.71

Was:

Qty in Cart: 0

Price:

MSRP:

$12.71

Was:

Subtotal:
Brake Kit For Unlined Brake Shoe

AFTERMARKET

MSRP:

$89.99

Was:

Brake Shoe Hardware Kit* High Quality Brake Kit* Dimensions: - 16.50 Inch Drum Diameter - 7 Inch Shoe Width* Components Not Available Separately* Made In USA * Sold Individually* Warranty On Brake...

09-05170164

SKU:

09-05170164

Material Options:

Steel

Truck Class:

Universal

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$89.99

Was:

Qty in Cart: 0

Price:

MSRP:

$89.99

Was:

Subtotal:
BESTfit Shackle Side Bar W/O Ears Type 12, 3.313 Inch - 4006001, 13130 For Advance Mixer Front 20K Axle

BESTFIT TRUCK PARTS

MSRP:

$24.28

Was:

BESTfit Type 12 C To C Shackle Side Bar Without Ears, With 1-1/4In Holes Replaces 4006001, 13130* High Quality Side Bar* Dimensions: - 5.344 Inch Length - 2.00 Inch Width - 3.313 Inch C To C - 1.00...

80-05090008

SKU:

80-05090008

Length Options:

5 Inch

Truck Class:

Heavy Duty

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

Width Options:

2 Inch

Height Options:

1 Inch

MSRP:

$24.28

Was:

Qty in Cart: 0

Price:

MSRP:

$24.28

Was:

Subtotal:
Flanged Lock Nut 3/4 Inch- 10 TPI

AUTOMANN USA

MSRP:

$2.31

Was:

Flanged Lock Nut Replaces D85020662* High Quality Flanged Lock Nut* Dimensions: - A/F- 1.10 Inch - Height- 0.65 Inch* Threads- 3/4 Inch- 10* Sold Individually* Warranty On Flanged Lock Nuts Against...

29-05250003

SKU:

29-05250003

Truck Class:

Heavy Duty

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$2.31

Was:

Qty in Cart: 0

Price:

MSRP:

$2.31

Was:

Subtotal:
On Sale

Limited Quantity Available

Grade C Lock Nut

AUTOMANN USA

MSRP:

Now: $0.26 - $6.34

Was: $1.07

Choose Option(s) to see description.Lock Nut 9/16 Inch -12 TPI Grade CGrade C Lock Nut With 9/16 Inch -12 Threads Replaces D85005002* High Quality Lock Nut* 0.86 Inch A/F* 0.47 Inch Height* Threads-...

PPR_206104

SKU:

PPR_206104

Truck Class:

Universal

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

Ready To Ship:

Yes

MSRP:

Now: $0.26 - $6.34

Was: $1.07

Qty in Cart: 0

Price:

MSRP:

Now: $0.26 - $6.34

Was: $1.07

Subtotal:
Flanged Lock Nut 1/2 Inch- 13 TPI Grade C

AUTOMANN USA

MSRP:

$1.12

Was:

Flanged Lock Nut Replaces 8397200, D85020636, And 60819000* High Quality Flanged Lock Nut* Dimensions: - 0.73 Inch A/F - 0.43 Inch Height* Threads- 1/2 Inch- 13* Grade C* Sold Individually* Warranty...

29-05250006

SKU:

29-05250006

Truck Class:

Heavy Duty

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$1.12

Was:

Qty in Cart: 0

Price:

MSRP:

$1.12

Was:

Subtotal:
Center Beam Bushing 12 Inch - 2325972, E1338 For Hendrickson

AFTERMARKET

MSRP:

$165.99

Was:

Center Beam Bushing 2 ID x 2-3/4 OD x 12 Inch W/ 3-9/16 OD Sleeve, Welded Plug* High Quality Center Beam Bushing * Dimensions: - 2 Inch ID - 2 3/4 Inch OD - 12 Inch Length* With 3 9/16 Inch OD...

29-05100063

SKU:

29-05100063

Material Options:

Steel

Diameter Options:

2 Inch

Truck Class:

Heavy Duty

Length Options:

12 Inch

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$165.99

Was:

Qty in Cart: 0

Price:

MSRP:

$165.99

Was:

Subtotal:
Flanged Lock Nut 5/8 Inch-11 TPI

AUTOMANN USA

MSRP:

$1.15

Was:

Flanged Lock Nut Replaces D85020649, W300306, 14003012, 95112H, 8397202, And A344X6200* High Quality Flanged Lock Nut* Dimensions: - A/F- 0.91 Inch - Height- 0.56 Inch* Threads- 5/8 Inch-11* Sold...

29-05250004

SKU:

29-05250004

Truck Class:

Heavy Duty

Material Options:

Steel

Make:

Universal Items

Product Type:

Frame & Chassis

Ready To Ship:

Yes

MSRP:

$1.15

Was:

Qty in Cart: 0

Price:

MSRP:

$1.15

Was:

Subtotal:
Slider Block Assembly - S14264 For Hendrickson 2-1/2in Spring, 2-5/8in Block

AFTERMARKET

MSRP:

$72.99

Was:

Slider Block With Bolt & Nut Replaces E3777 And R303777* High Quality Slider Block* Consists Of - (1) Slider Block - (1) 7/8 Inch Lock Nut - (1) 7/8 Inch X 5-1/2 Inch Cap Screw * For 2 1/2 Inch...

29-05200001

SKU:

29-05200001

Length Options:

2 1/2 Inch

Material Options:

Steel

Truck Class:

Heavy Duty

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$72.99

Was:

Qty in Cart: 0

Price:

MSRP:

$72.99

Was:

Subtotal:
Poly Walking Beam Center Bushing - E9510,R309510, 21034569 For Hendrickson

AFTERMARKET

MSRP:

$243.99

Was:

Poly Walking Beam Center Bushing 3.5 SM OD x 12 Inch, Welded Plug* High Quality Center Bushing* Poly* Dimensions: - 2.5 Inch ID - 4.75 Inch Large OD - 3.5 Inch Small OD - 12 Inch Length* Welded...

29-05100045

SKU:

29-05100045

Truck Class:

Heavy Duty

Material Options:

Steel

Diameter Options:

2 1/2 Inch

Length Options:

12 Inch

Make:

Universal Items

Product Type:

Frame & Chassis

Make:

Trailer

MSRP:

$243.99

Was:

Qty in Cart: 0

Price:

MSRP:

$243.99

Was:

Subtotal:
BESTfit 1.125 ID X 4.25 Inch Poly Fifth Wheel Bushing

BESTFIT TRUCK PARTS

MSRP:

$20.01

Was:

Poly Fifth Wheel Bushing Replaces D90, E7450, And R307450 By BESTfitThe BESTfit 1.125 ID X 4.25 Inch Poly Fifth Wheel Bushing delivers precision engineering and long-lasting durability. With a 4...

29-05110002

SKU:

29-05110002

Material Options:

Plastic/Poly

Truck Class:

Heavy Duty

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$20.01

Was:

Qty in Cart: 0

Price:

MSRP:

$20.01

Was:

Subtotal:
Beam Center Bushing 3.5 Sm OD X 12.00 Inch- 5919-000 For Hendrickson

AFTERMARKET

MSRP:

$330.99

Was:

12 Inch Beam Center Bushing W/ 3.5 Small OD & 4.75 Large OD* High Quality Center Bushing* Dimensions: - 12.00 Inch Overall Length - 7.00 Inch C To C Length - 4.75 Inch Overall Diameter - 3.50 Inch...

29-05100041

SKU:

29-05100041

Truck Class:

Heavy Duty

Material Options:

Steel

Length Options:

12 Inch

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$330.99

Was:

Qty in Cart: 0

Price:

MSRP:

$330.99

Was:

Subtotal:
End Beam Bushing 5-3/4 Inch - D402, E9512, 45900P For Hendrickson

AFTERMARKET

MSRP:

$82.99

Was:

End Beam Bushing 2-1/2 ID x 4-3/8 OD x 5-3/4 Inch W/ 4-1/4in Sleeve* High Quality End Beam Bushing* Poly* Dimensions: - 2-1/2 Inch ID - 4-3/8 Inch OD - 5-3/4 Inch Length* With 4 1/4 Inch Sleeve* 70...

29-05100022

SKU:

29-05100022

Truck Class:

Heavy Duty

Material Options:

Plastic/Poly

Diameter Options:

2 1/2 Inch

Make:

Universal Items

Product Type:

Frame & Chassis

Length Options:

5 3/4 Inch

MSRP:

$82.99

Was:

Qty in Cart: 0

Price:

MSRP:

$82.99

Was:

Subtotal:
Flanged Lock Nut 07/16 Inch- 20 TPI Grade C

AUTOMANN USA

MSRP:

$0.90

Was:

Flanged Lock Nut With 07/16 Inch- 20 Threads* High Quality Flanged Lock Nut* A/F- 0.656 Inch* Threads: 07/16 Inch- 20* Sold Individually* Warranty On Flanged Lock Nuts Against Defects In Workmanship...

09-05250032

SKU:

09-05250032

Material Options:

Steel

Truck Class:

Universal

Make:

Universal Items

Product Type:

Frame & Chassis

Ready To Ship:

Yes

MSRP:

$0.90

Was:

Qty in Cart: 0

Price:

MSRP:

$0.90

Was:

Subtotal:
Jam Nut 5/8 Inch - 18 TPI

AUTOMANN USA

MSRP:

$0.47

Was:

15/16 Inch Thick Jam Nut* High Quality Jam Nut* W.A.F.- 15/16 Inch* Thickness- 3/8 Inch* Threads: 5/8 Inch- 18* Sold Individually* Warranty On Jam Nuts Against Defects In Workmanship & Material From...

09-05250026

SKU:

09-05250026

Material Options:

Steel

Truck Class:

Universal

Make:

Universal Items

Product Type:

Frame & Chassis

MSRP:

$0.47

Was:

Qty in Cart: 0

Price:

MSRP:

$0.47

Was:

Subtotal:

Total: items /

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Items 1001 to 1020 of 1890 total

Enhance your Peterbilt 388 with durable Peterbilt 377, 378, 388, and 389 frame crossmembers and stylish covers. From stainless steel and aluminum options to fiberglass and steel designs, this product lineup offers a variety of high-quality products to protect your truck's rear frame. Keep your rig looking its best with customizable covers that feature notch cutouts, light openings, and emblem mounts. Plus, find the right walking beam components to ensure a smooth, comfortable ride. Whether you're restoring a classic Peterbilt or upgrading a newer model, this collection of frame crossmembers and covers has everything you need to elevate your Peterbilt 388's appearance and functionality.

Frequently Asked Questions About Peterbilt 388 Frame Crossmembers & Covers

What are frame crossmembers and covers used for on a Peterbilt 388?

Frame crossmembers are structural components that run horizontally between the frame rails, providing rigidity and support for the chassis, while covers protect these areas from road debris, moisture, and corrosion. Together they help maintain frame integrity and give the underside of the truck a cleaner, finished appearance.

Will these crossmembers and covers fit my specific Peterbilt 388 configuration?

Fitment can vary depending on wheelbase, frame rail spacing, and whether your truck has factory or aftermarket modifications. It is important to check the listed specifications and, when possible, compare part numbers with your truck's build sheet or consult with our parts team before ordering to confirm a proper fit.

What materials are these parts made from, and how well do they hold up over time?

Most crossmembers and covers are constructed from steel or aluminum, depending on the specific part and application. Steel components typically offer strength and durability for structural crossmembers, while aluminum covers are often chosen for their corrosion resistance and lighter weight. Finish options may include raw metal, painted, or powder-coated surfaces to help resist rust and wear from daily use.

Can I install a crossmember or cover myself, or should I have a professional do it?

Covers are generally straightforward to install with basic tools and can often be handled by anyone comfortable with routine truck maintenance. Structural crossmembers, however, are load-bearing components, and improper installation can affect frame integrity and safety. For crossmember replacement or modification, we recommend having the work done by a qualified technician familiar with frame repairs.

How do I know if my current crossmember or cover needs to be replaced?

Common signs include visible rust or corrosion, cracks, bending, loose or missing mounting hardware, or a cover that no longer sits flush and allows debris underneath. If you notice any flexing or unusual noise from the frame area while driving, it is a good idea to have the crossmember inspected as soon as possible.