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Chrome Rush countdown – 14% off semi truck parts and chrome accessories at 4 State Trucks
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Mack RD Trucks

Shop for aftermarket Mack RD truck parts (1979 – 2004) to repair, replace, and refurbish your heavy-duty vocational rig. We sell replacement and aftermarket parts for popular Mack RD models, including the RD600, RD688, RD688S, RD690, and RD690S. Source collision-replacement parts, customize the exterior, or add interior cab accessories to refurbish your truck at 4 State Trucks.
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 1/2 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10508B106, 125HBL86, 1256

    1/2 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10508B106, 125HBL86, 1256

    AUTOMANN USA

    $2.19
    1/2 Inch Barb X 3/8 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 1/2" Push-On Hose* Made Of Brass* Barb Hose End: 1/2 Inch Inner Diameter* Male NPT...
    09-05040105
    SKU:
    09-05040105
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $2.19
    Qty in Cart: 0
    Price:
    $2.19
    Subtotal:
  • 1/2 Inch Barb X 1/4 Inch Pipe Brass Hose Fitting Replaces 10508B104, 125HBL84

    1/2 Inch Barb X 1/4 Inch Pipe Brass Hose Fitting Replaces 10508B104, 125HBL84

    AUTOMANN USA

    $2.01
    1/2 Inch Barb X 1/4 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 1/2" Push-On Hose* Made Of Brass* Barb Hose End: 1/2 Inch Inner Diameter* Male NPT...
    09-05040104
    SKU:
    09-05040104
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $2.01
    Qty in Cart: 0
    Price:
    $2.01
    Subtotal:
  • 1/4 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10504B106. 125HBL46

    1/4 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10504B106. 125HBL46

    AUTOMANN USA

    $1.72
    1/4 Inch Barb X 3/8 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 1/4" Push-On Hose* Made Of Brass* Barb Hose End: 1/4 Inch Inner Diameter* Male NPT...
    09-05040106
    SKU:
    09-05040106
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $1.72
    Qty in Cart: 0
    Price:
    $1.72
    Subtotal:
  • 1/2 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10508B112, 125HBL812

    1/2 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10508B112, 125HBL812

    AUTOMANN USA

    $5.68
    1/2 Inch Barb X 3/4 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 1/2" Push-On Hose* Made Of Brass* Barb Hose End: 1/2 Inch Inner Diameter* Male NPT...
    09-05040103
    SKU:
    09-05040103
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $5.68
    Qty in Cart: 0
    Price:
    $5.68
    Subtotal:
  • 5/8 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10510B106, 125HBL106

    5/8 Inch Barb X 3/8 Inch Pipe Brass Hose Fitting Replaces 10510B106, 125HBL106

    AUTOMANN USA

    $2.97
    5/8 Inch Barb X 3/8 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 5/8" Push-On Hose, 09-02500149* Made Of Brass* Barb Hose End: 5/8 Inch Inner...
    09-05040076
    SKU:
    09-05040076
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $2.97
    Qty in Cart: 0
    Price:
    $2.97
    Subtotal:
  • 5/8 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL108, 10510B108

    5/8 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL108, 10510B108

    AUTOMANN USA

    $4.12
    5/8 Inch Barb X 1/2 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 5/8" Push-On Hose, 09-02500149* Made Of Brass* Barb Hose End: 5/8 Inch Inner...
    09-05040075
    SKU:
    09-05040075
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $4.12
    Qty in Cart: 0
    Price:
    $4.12
    Subtotal:
  • 1/2 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 10508B108, 125HBL88

    1/2 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 10508B108, 125HBL88

    AUTOMANN USA

    $3.81
    1/2 Inch Barb X 1/2 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 1/2" Push-On Hose* Made Of Brass* Barb Hose End: 1/2 Inch Inner Diameter* Male NPT...
    09-05040099
    SKU:
    09-05040099
    Diameter Options:
    1/2 Inch
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $3.81
    Qty in Cart: 0
    Price:
    $3.81
    Subtotal:
  • 3/4 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10512B112, 125HBL1212

    3/4 Inch Barb X 3/4 Inch Pipe Brass Hose Fitting Replaces 10512B112, 125HBL1212

    AUTOMANN USA

    $5.50
    3/4 Inch Barb X 3/4 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 3/4" Push-On Hose, 09-02500150* Made Of Brass* Barb Hose End: 3/4 Inch Inner...
    09-05040072
    SKU:
    09-05040072
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $5.50
    Qty in Cart: 0
    Price:
    $5.50
    Subtotal:
  • Brass Male Elbow 3/4 Inch SAE X 3/4 Inch Pipe Replaces 49X12X12, 149F1212

    Brass Male Elbow 3/4 Inch SAE X 3/4 Inch Pipe Replaces 49X12X12, 149F1212

    AUTOMANN USA

    $14.04
    90 Degree Male Elbow 3/4 Inch SAE X 3/4 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040074
    SKU:
    09-05040074
    Degree Options:
    45
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $14.04
    Qty in Cart: 0
    Price:
    $14.04
    Subtotal:
  • 3/4 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL128, 10512B108

    3/4 Inch Barb X 1/2 Inch Pipe Brass Hose Fitting Replaces 125HBL128, 10512B108

    AUTOMANN USA

    $4.67
    3/4 Inch Barb X 1/2 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 3/4" Push-On Hose, 09-02500150* Made Of Brass* Barb Hose End: 3/4 Inch Inner...
    09-05040071
    SKU:
    09-05040071
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $4.67
    Qty in Cart: 0
    Price:
    $4.67
    Subtotal:
  • Brass Male Elbow 3/4 Inch SAE X 1/2 Inch Pipe Replaces 49X12, 149F128

    Brass Male Elbow 3/4 Inch SAE X 1/2 Inch Pipe Replaces 49X12, 149F128

    AUTOMANN USA

    $13.59
    90 Degree Male Elbow 3/4 Inch SAE X 1/2 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040073
    SKU:
    09-05040073
    Product Type:
    Air, Electrical, & Safety
    Degree Options:
    45
    Material Options:
    Brass
    Make:
    Universal Items
    $13.59
    Qty in Cart: 0
    Price:
    $13.59
    Subtotal:
  • Brass Male Elbow 5/8 Inch SAE X 3/8 Inch Pipe Replaces 49X10X6, 149F106

    Brass Male Elbow 5/8 Inch SAE X 3/8 Inch Pipe Replaces 49X10X6, 149F106

    AUTOMANN USA

    $11.67
    90 Degree Male Elbow 5/8 Inch SAE X 3/8 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040068
    SKU:
    09-05040068
    Degree Options:
    45
    Material Options:
    Brass
    Diameter Options:
    5/8 Inch
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $11.67
    Qty in Cart: 0
    Price:
    $11.67
    Subtotal:
  • Brass Male Elbow 5/8 Inch SAE X 3/4 Inch Pipe Replaces 149F1012

    Brass Male Elbow 5/8 Inch SAE X 3/4 Inch Pipe Replaces 149F1012

    AUTOMANN USA

    $10.20
    90 Degree Male Elbow 5/8 Inch SAE X 3/4 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040070
    SKU:
    09-05040070
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Degree Options:
    45
    Make:
    Universal Items
    $10.20
    Qty in Cart: 0
    Price:
    $10.20
    Subtotal:
  • Brass Male Elbow 5/8 Inch SAE X 1/2 Inch Pipe Replaces 49X10, 149F108

    Brass Male Elbow 5/8 Inch SAE X 1/2 Inch Pipe Replaces 49X10, 149F108

    AUTOMANN USA

    $8.36
    90 Degree Male Elbow 5/8 Inch SAE X 1/2 Inch Pipe* High Quality Male 90 Degree Elbow Valve* SAE 45 Degree Flare Fitting Type* Male SAE Flare Tube To Male NPT Connection* Used In Tube Types: Copper,...
    09-05040069
    SKU:
    09-05040069
    Degree Options:
    45
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $8.36
    Qty in Cart: 0
    Price:
    $8.36
    Subtotal:
  • Single Check Valve Replaces 227717, 227788, 227871, 20QE1330, KN23000, N13526AJ, 1020012

    Single Check Valve Replaces 227717, 227788, 227871, 20QE1330, KN23000, N13526AJ, 1020012

    AUTOMANN USA

    $13.97
    1/2 X 2.030 Inch Single Check Valve* High Quality Single Check Valve* 1/2 Inch NPT Female Inlet* 1/2 Inch NPT Male Outlet* Made Of Brass* 2.030 Inch Length* Sold Individually* Warranty On Single...
    09-05040045
    SKU:
    09-05040045
    Diameter Options:
    1/2 Inch
    Material Options:
    Brass
    Length Options:
    2 Inch
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $13.97
    Qty in Cart: 0
    Price:
    $13.97
    Subtotal:
  • 5/8 X 1/2 Inch Brass Male Connector Replaces 1368X10, VS68AB108, 116810D, 012055

    5/8 X 1/2 Inch Brass Male Connector Replaces 1368X10, VS68AB108, 116810D, 012055

    AUTOMANN USA

    $7.63
    5/8 X 1/2 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 5/8 Inch Outer Diameter* Pipe End: 1/2...
    09-05040036
    SKU:
    09-05040036
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $7.63
    Qty in Cart: 0
    Price:
    $7.63
    Subtotal:
  • 3/4 X 3/4 Inch Brass Male Connector Replaces 1368X12X12, VS68AB1212, 116812E

    3/4 X 3/4 Inch Brass Male Connector Replaces 1368X12X12, VS68AB1212, 116812E

    AUTOMANN USA

    $12.59
    3/4 X 3/4 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 3/4 Inch Outer Diameter* Pipe End: 3/4...
    09-05040038
    SKU:
    09-05040038
    Material Options:
    Brass
    Diameter Options:
    3/4 Inch
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $12.59
    Qty in Cart: 0
    Price:
    $12.59
    Subtotal:
  • 3/8 X 3/8 Inch Brass Swivel Hose Coupling

    3/8 X 3/8 Inch Brass Swivel Hose Coupling

    AUTOMANN USA

    $13.04
    3/8 X 3/8 Inch Swivel Hose Coupling Replaces 33806BY86, 66RBSV634, 1106, 500046This Brass Swivel Hose Coupling, sized 3/8 x 3/8 inch, is designed for dependable use in air brake hose systems and...
    09-05040029
    SKU:
    09-05040029
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Diameter Options:
    3/8 Inch
    Make:
    Universal Items
    $13.04
    Qty in Cart: 0
    Price:
    $13.04
    Subtotal:
  • 3/4 X 1/2 Inch Brass Male Connector Replaces 1368X12, VS68AB128, 116812D, 012061

    3/4 X 1/2 Inch Brass Male Connector Replaces 1368X12, VS68AB128, 116812D, 012061

    AUTOMANN USA

    $12.03
    3/4 X 1/2 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 3/4 Inch Outer Diameter* Pipe End: 1/2...
    09-05040037
    SKU:
    09-05040037
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $12.03
    Qty in Cart: 0
    Price:
    $12.03
    Subtotal:
  • 5/8 X 3/8 Inch Brass Male Connector Replaces 1368X10X6, VS68AB106, 116810C, 012053

    5/8 X 3/8 Inch Brass Male Connector Replaces 1368X10X6, VS68AB106, 116810C, 012053

    AUTOMANN USA

    $10.57
    5/8 X 3/8 Inch Male Connector* High Quality Male Connector* Fitting Type: Compression - Copper Tubing* Connection: Tube To Male NPT* Made Of Brass* Tube End: 5/8 Inch Outer Diameter* Pipe End: 3/8...
    09-05040035
    SKU:
    09-05040035
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $10.57
    Qty in Cart: 0
    Price:
    $10.57
    Subtotal:
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Shop Aftermarket Mack RD Truck Parts

Working, old-school big rigs like the Mack RD series endure many years of wear and tear on jobs sites. Over time, Mack RD hardware and components experience high heat and pressure, turning mild components replacements into system-wide repairs. We stock the model-specific mechanical parts to keep your hard-working truck performing day after day:

Cosmetic Aftermarket Upgrades for Mack RD Trucks

Road debris can chip away at the headlights, fenders, mirrors, and even mud flaps over time. That’s why we stock hundreds of exterior Mack RD replacement parts to replace damaged parts. Lastly, you can find decorative custom upgrades to spruce-up the look of your rig, from interior custom dashboards to stainless steel step boxes for easy cab exit and entry.

Frequently Asked Questions About Mack RD Truck Parts

What years and models of Mack RD trucks do your parts fit?

Our Mack RD parts are designed to fit RD600, RD688, and RD690 models manufactured from 1979 through 2004. However, compatibility can vary based on specific configurations and factory options. We recommend checking your OEM or contacting our team with your truck's model year and any special equipment codes to ensure proper fitment before ordering.

Are your Mack RD bumpers made from chrome-plated steel or stainless steel?

We offer both options depending on your needs and budget. Our chrome-plated steel bumpers feature a triple-chrome plating process over heavy-gauge steel for durability and shine. Our stainless steel options are typically 304-grade stainless with a mirror polish finish. Chrome bumpers are more affordable but require regular maintenance, while stainless steel resists corrosion better in harsh conditions but comes at a higher price point.

Do I need special tools or professional installation for Mack RD bumpers?

Most Mack RD bumper installations can be completed with standard shop tools including socket sets, wrenches, and a drill for any additional mounting holes. The bumpers typically weigh between 80-150 pounds, so having a helper or hoist is strongly recommended. Installation usually takes 2-4 hours. Some aftermarket bumpers may require minor modifications to mounting brackets or drilling new holes. Professional installation is recommended if you're not comfortable with heavy lifting or drilling.

What's the difference between OEM-style and aftermarket Mack RD parts?

OEM-style parts are manufactured to match original factory specifications for direct bolt-on replacement. Aftermarket parts may offer enhanced features like additional gauge holes, different styling, or heavier construction but might require modifications during installation. OEM-style parts typically maintain factory warranty compliance, while aftermarket options often provide better value and customization options. Both meet DOT standards when applicable.

How do I maintain chrome parts on my Mack RD to prevent rust and pitting?

Chrome parts require regular maintenance to maintain their appearance, especially in regions using road salt. Wash chrome surfaces weekly with mild soap and water, then dry thoroughly. Apply a quality chrome polish monthly and use a chrome sealant every 3-4 months for added protection. Avoid abrasive cleaners or steel wool which can scratch the chrome. For winter storage or harsh conditions, consider applying a thin coat of WD-40 or similar protectant, then remove before regular use.

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