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Safety-Air-Electrical

Shop semi truck gladhands, air tanks, semi-trailer cords, 7-way receptacles and more. We stock premium aftermarket replacement air system and electrical components to maintain your truck’s critical air line connections.
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  • Brass Compression Tube Nut Fitting DOT W/ Size Options

    Brass Compression Tube Nut Fitting DOT W/ Size Options

    AUTOMANN USA

    $1.01 - $2.47
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks3/8 Inch Brass Compression Nut DOT3/8 Inch Brass Compression Tube Nut Fitting* High Quality Compression...
    PPR_299937
    SKU:
    PPR_299937
    Product Type:
    Air, Electrical, & Safety
    Diameter Options:
    3/8 Inch
    Diameter Options:
    1/2 Inch
    Material Options:
    Brass
    Diameter Options:
    1/4 Inch
    Diameter Options:
    1/8 Inch
    Make:
    Universal Items
    $1.01 - $2.47
    Qty in Cart: 0
    Price:
    $1.01 - $2.47
    Subtotal:
  • Driver/Passenger Side 10 X 2.25 Inch Electric Brake Assembly 023-026-00/023-027-00

    Driver/Passenger Side 10 X 2.25 Inch Electric Brake Assembly 023-026-00/023-027-00

    AFTERMARKET

    $69.99 - $79.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trailers10 X 2.25 Inch Electric Brake Assembly Driver Side 023-026-00Electric Trailer Brake Assembly - 3,500...
    PPR_299935
    SKU:
    PPR_299935
    Truck Class:
    Heavy Duty
    Product Type:
    Trailer
    Make:
    Trailer
    Position:
    Driver Side
    Position:
    Passenger Side
    Rating:
    3500 LBS
    Make:
    Universal Items
    $69.99 - $79.99
    Qty in Cart: 0
    Price:
    $69.99 - $79.99
    Subtotal:
  • Shoe Brake Hardware Kit 142.453682 For Dana Spicer Camshafts

    Shoe Brake Hardware Kit 142.453682 For Dana Spicer Camshafts

    AUTOMANN USA

    $21.79 - $30.91
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrailersShoe Brake Hardware Kit 142.453682 For Dana/Spicer New Style CamshaftsReplacement Hardware Kit For...
    PPR_299932
    SKU:
    PPR_299932
    Product Type:
    Trailer
    Truck Class:
    Heavy Duty
    Make:
    Trailer
    Position:
    Kit Full
    Make:
    Universal Items
    $21.79 - $30.91
    Qty in Cart: 0
    Price:
    $21.79 - $30.91
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  • Air Brake Camshaft Replaces E-9759, R607253, M12WKL20-233, E9760, R607254 For Dana Spicer New Style

    Air Brake Camshaft Replaces E-9759, R607253, M12WKL20-233, E9760, R607254 For Dana Spicer New Style

    AFTERMARKET

    $77.99 - $89.99
    Choose Option(s) to see description.Fitment* Fits Various Makes And Models Of TrailersAir Brake Camshaft Driver Side Replaces E-9759, R607253, M12WKL20-233 For Dana/Spicer Axles-New StyleReplacement...
    PPR_299808
    SKU:
    PPR_299808
    Product Type:
    Trailer
    Truck Class:
    Heavy Duty
    Make:
    Trailer
    Position:
    Passenger Side
    Position:
    Driver Side
    Length Options:
    23 Inch
    $77.99 - $89.99
    Qty in Cart: 0
    Price:
    $77.99 - $89.99
    Subtotal:
  • Air Brake Camshaft Replaces 2210L5342, 2210L5342S, 2210U7587, 18-527

    Air Brake Camshaft Replaces 2210L5342, 2210L5342S, 2210U7587, 18-527

    AFTERMARKET

    $81.99
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of TrucksAir Brake Camshaft Driver Side Replaces 2210U7587, 18-527Replacement Trailer Air Brake Camshaft* High...
    PPR_299794
    SKU:
    PPR_299794
    Position:
    Driver Side
    Length Options:
    13 Inch
    Position:
    Passenger Side
    Make:
    Universal Items
    Product Type:
    Trailer
    $81.99
    Qty in Cart: 0
    Price:
    $81.99
    Subtotal:
  • 16-14 Awg Blue Butt Connector, 100 Pcs

    16-14 Awg Blue Butt Connector, 100 Pcs

    UNITED PACIFIC

    $14.79 - $20.51
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks16-14 Awg Vinyl Butt Connector, 100 Pcs16-14 Awg Vinyl Butt Connector, 100 Pcs* High Quality Butt...
    PPR_299776
    SKU:
    PPR_299776
    Product Type:
    Lighting
    Material Options:
    Nylon
    Color:
    Blue
    Material Options:
    Vinyl
    Make:
    Universal Items
    $14.79 - $20.51
    Qty in Cart: 0
    Price:
    $14.79 - $20.51
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  • 12-10 Awg Vinyl Butt Connector

    12-10 Awg Vinyl Butt Connector

    UNITED PACIFIC

    $13.50 - $24.55
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models Of Trucks12-10 Awg Vinyl Butt Connector, 50 Pcs12-10 Awg Vinyl Butt Connector, 50 Pcs.* High Quality Butt...
    PPR_299772
    SKU:
    PPR_299772
    Product Type:
    Lighting
    Color:
    Yellow
    Material Options:
    Vinyl
    Make:
    Universal Items
    $13.50 - $24.55
    Qty in Cart: 0
    Price:
    $13.50 - $24.55
    Subtotal:
  • FREE SHIPPING OVER $249
    22-18 AWG .250 Tab Vinyl W/ Optional Quantity Packs

    22-18 AWG .250 Tab Vinyl W/ Optional Quantity Packs

    UNITED PACIFIC

    $3.99 - $17.38
    Choose Option(s) to see description.Fitment** Universal - Fits Multiple Makes & Models of Trucks22-18 AWG .250 Tab Vinyl Female Disconnect Terminals - 100 Pack22-18 Vinyl 0.250 Inch Female Quick...
    PPR_299774
    SKU:
    PPR_299774
    Material Options:
    Vinyl
    Color:
    Red
    Make:
    Universal Items
    Color:
    Blue
    Product Type:
    Air, Electrical, & Safety
    Color:
    Yellow
    Material Options:
    Copper
    Location:
    Made In USA
    $3.99 - $17.38
    Qty in Cart: 0
    Price:
    $3.99 - $17.38
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  • Aluminum 2 Post Grizzly Moose Bumper Guard W/ Airflow Cutouts For Mack Anthem

    Aluminum 2 Post Grizzly Moose Bumper Guard W/ Airflow Cutouts For Mack Anthem

    MAGNUM

    $6,708.99
    2 Post Grizzly Aluminum Moose Bumper Guard W/ OEM Driving Light CutoutsEnhance your Mack Anthem with the Aluminum 2 Post Grizzly Moose Bumper Guard, engineered for heavy-duty protection and...
    11-013000102
    SKU:
    11-013000102
    Finish Options:
    Polished
    Style Options:
    2 Post
    Light Options:
    Without Lights
    Material Options:
    Aluminum
    Product Type:
    Bumpers
    Make:
    Mack
    $6,708.99
    Qty in Cart: 0
    Price:
    $6,708.99
    Subtotal:
  • Deep Nut Replaces JA014709

    Deep Nut Replaces JA014709

    AUTOMANN USA

    $0.56
    0.75 X 0.687 Inch Deep NutKeep your truck components tightly fastened with this durable Deep Nut, replacement for JA014709. With 1/2-inch-20 threads, Grade 5 material, and 0.687-inch height by 0...
    29-1240005
    SKU:
    29-1240005
    Width Options:
    3/4 Inch
    Product Type:
    Hood Parts & Acc.
    Make:
    Mack
    $0.56
    Qty in Cart: 0
    Price:
    $0.56
    Subtotal:
  • Expansion Valve Replaces 1875002, E-805025, 38878, 1600, 12-2012A For Kenworth, Mack & Peterbilt

    Expansion Valve Replaces 1875002, E-805025, 38878, 1600, 12-2012A For Kenworth, Mack & Peterbilt

    AUTOMANN USA

    $28.82
    2.89 X 1.008 X 1.88 Inch Block Type Expansion ValvePrecision-engineered for heavy-duty HVAC systems, this expansion valve ensures reliable cooling. Replacement for 1875002, E-805025, 38878, 1600, and...
    29-07000002
    SKU:
    29-07000002
    Product Type:
    Engine Parts
    Make:
    Peterbilt
    Make:
    Mack
    Make:
    Kenworth
    $28.82
    Qty in Cart: 0
    Price:
    $28.82
    Subtotal:
  • V- Rod Replaces R3011905, 3940773 For Volvo, Mack

    V- Rod Replaces R3011905, 3940773 For Volvo, Mack

    AFTERMARKET

    $628.99
    57 Degree V- Rod For T-Ride Suspension- 2 Leaf SpringEnsure your Volvo or Mack T-Ride suspension performs at its best with the V-Rod, a heavy-duty 2-leaf spring replacement built for precision and...
    13-05100020
    SKU:
    13-05100020
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Make:
    Volvo
    $628.99
    Qty in Cart: 0
    Price:
    $628.99
    Subtotal:
  • V- Rod Replaces R3011906, JVL0011, 1606552, 3172829, 8073569, V3172829 For Volvo, Mack

    V- Rod Replaces R3011906, JVL0011, 1606552, 3172829, 8073569, V3172829 For Volvo, Mack

    AFTERMARKET

    $570.99
    57 Degree V- Rod For T-Ride Suspension- 3 Leaf SpringOptimize your Volvo or Mack truck's suspension with the V-Rod, a durable 3-leaf spring replacement for T-Ride systems. This high-quality kit...
    13-05100021
    SKU:
    13-05100021
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Volvo
    $570.99
    Qty in Cart: 0
    Price:
    $570.99
    Subtotal:
  • Load Spring Replaces R308851, 1577873, 8151413, 1089501, 1609657, 1629553, 20390836, 3090971, V1609657, V1629553 For Volvo, Mack

    Load Spring Replaces R308851, 1577873, 8151413, 1089501, 1609657, 1629553, 20390836, 3090971, V1609657, V1629553 For Volvo, Mack

    AFTERMARKET

    $171.99
    T-Ride Suspension Load SpringDeliver consistent ride support and suspension alignment with the Volvo, Mack Load Spring, a robust replacement for T-Ride 40K and 46K trucks. With a 7.09-inch top plate,...
    13-05100019
    SKU:
    13-05100019
    Product Type:
    Frame & Chassis
    Truck Class:
    Heavy Duty
    Make:
    Volvo
    $171.99
    Qty in Cart: 0
    Price:
    $171.99
    Subtotal:
  • 3M Particulate Filters- 2 Pack

    3M Particulate Filters- 2 Pack

    ZEPHYR

    $17.94
    2 Pack Snap On 3M Particulate FiltersSafeguard your lungs with the 3M Particulate Filters - 2 Pack, high-quality replacement filters for 3M half-face and full-face respirators. NIOSH-approved for 99...
    09-17040041
    SKU:
    09-17040041
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $17.94
    Qty in Cart: 0
    Price:
    $17.94
    Subtotal:
  • On Sale
    Limited Quantity Available
    Full Face Respirator Mask

    Full Face Respirator Mask

    ZEPHYR

    Now: $139.00
    Was: $215.99
    Respirator Mask Full FaceStay fully protected on the job with the Full Face Respirator Mask, a high-quality, reusable mask designed to safeguard your eyes, nose, and mouth from dust, particles, and...
    09-17040042
    SKU:
    09-17040042
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    Ready To Ship:
    Yes
    Now: $139.00
    Was: $215.99
    Qty in Cart: 0
    Price:
    Now: $139.00
    Was: $215.99
    Subtotal:
  • 24 X 24 Inch Yellow Caution Wide Turns Poly Mud Flap

    24 X 24 Inch Yellow Caution Wide Turns Poly Mud Flap

    AFTERMARKET

    $17.15
    24 X 24 Inch Yellow Mud Flap W/ Caution Wide Turns PrintBoost safety and visibility on the road with this 24 x 24 Inch Yellow Caution Wide Turns Poly Mud Flap. Crafted from durable polycarbonate,...
    09-050700276
    SKU:
    09-050700276
    Material Options:
    Plastic/Poly
    Color:
    Yellow
    Product Type:
    Mud Flaps
    Length Options:
    1/8 Inch
    Height Options:
    24 Inch
    Width Options:
    24 Inch
    Make:
    Universal Items
    $17.15
    Qty in Cart: 0
    Price:
    $17.15
    Subtotal:
  • 14 Inch Stainless Steel 2 Piece Drop Visor For Mack R

    14 Inch Stainless Steel 2 Piece Drop Visor For Mack R

    ARANDA TRUCK ACCESSORIES

    $560.99
    14 Inch Stainless Steel 2 Piece Drop Visor Fits Mack RImprove both the look and protection of your Mack R cab with the 14 Inch Blank Stainless Steel Drop Visor. Crafted from 18-gauge stainless steel,...
    11-09000018
    SKU:
    11-09000018
    Product Type:
    Exterior
    Size Options:
    18 Gauge
    Height Options:
    14 Inch
    Type Options:
    Standard Mount
    Material Options:
    Stainless Steel
    Make:
    Mack
    $560.99
    Qty in Cart: 0
    Price:
    $560.99
    Subtotal:
  • 46 X 7.5 Inch Blank Aluminum Rear Window Drop Visor For Mack RW Superliner

    46 X 7.5 Inch Blank Aluminum Rear Window Drop Visor For Mack RW Superliner

    ARANDA TRUCK ACCESSORIES

    $285.99
    46 X 7.5 Inch Blank Aluminum Rear Window Drop Visor Fits Mack RW SuperlinerAdd both style and function to your Mack RW Superliner with the 46 x 7.5 Inch Blank Aluminum Rear Window Drop Visor. Crafted...
    11-0904001
    SKU:
    11-0904001
    Type Options:
    Standard Mount
    Height Options:
    7 Inch
    Width Options:
    46 Inch
    Material Options:
    Aluminum
    Product Type:
    Exterior
    Make:
    Mack
    $285.99
    Qty in Cart: 0
    Price:
    $285.99
    Subtotal:
  • FREE SHIPPING OVER $249
    12 Gauge Red Electrical Wire - Sold Per Foot

    12 Gauge Red Electrical Wire - Sold Per Foot

    PARTS DISTRIBUTING

    $2.03
    Red 12 Gauge Electrical WireDoes your next project require 12 gauge electrical wire? 4 State Trucks carries red electrical wire sold by the foot to assist you with the required amount you need. Order...
    09-16031202
    SKU:
    09-16031202
    Product Type:
    Air, Electrical, & Safety
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $2.03
    Qty in Cart: 0
    Price:
    $2.03
    Subtotal:
  • Total: items /

Adding your products to cart

Semi Truck Gladhands & Air Connections

A semi truck gladhand is the critical connection point between your tractor air lines and the trailer’s air-brake system. These heavy-duty couplers lock together with a rubber seal to hold air pressure securely. Our inventory helps you restore and replace your existing gladhand configuration when it’s cracked, leaking, corroded, or damaged. Semi Truck Gladhand Replacements: Replace worn or damaged tractor-trailer air couplers to restore a tight, reliable air connection. Service Gladhands: Blue service gladhands carry control air used to apply the trailer brakes during normal braking. Emergency Gladhands: Red emergency gladhands supply constant air pressure to the trailer and keep the emergency spring brakes released while driving. Gladhand Seals and Replacement Parts: Replace cracked, flattened, hardened, or leaking seals when the gladhand body and locking tabs remain in good condition. Air Lines with Gladhands: Find 2-in-1, 3-in-1, ABS, and power air lines to replace chafed, cracked, stretched, or worn tractor-trailer connections.

Signs of a Leaking Gladhand

Replace or inspect the gladhand when you notice hissing, air-pressure loss, frequent compressor cycling, slow air recovery, visible seal damage, or air leaking at the tractor-trailer connection.

Gladhand Seals vs. Complete Couplers

Replace the rubber seal when the coupler body is solid but the gasket is worn, cracked, flattened, or leaking. Replace the complete gladhand when the body, locking tabs, threads, or sealing surface is damaged or badly corroded.

Individual Gladhands vs. Complete Air-Line Assemblies

Individual gladhands make sense when your hoses remain in good condition and only the coupler needs replacement. Complete air-line assemblies replace the hoses and connections together. Choose them when lines are cracked, weathered, stretched, damaged, or due for replacement.

Air Brake Valves & Controls

We stock tractor-trailer air-brake protection valves, quick-release valves, emergency relay valves, and MV3 dash valves. Replace worn PP5 and PPDC control valves, trailer brake valves, and related spring brake components to restore proper air-brake control.

Air System Maintenance & Repair Parts

Maintain and repair your air system with air dryers, air solenoid valves, air hoses, fittings, and air tank hardware. Emergency air-brake and in-cab air-line repair kits also help address damaged lines and fittings during roadside repairs.

Trailer ABS & Electrical Connections

Keep tractor-trailer air and electrical connections organized with ABS cables, 7-way electrical cords, wrapped hose assemblies, air-line boxes, and pogo sticks. Replace worn or damaged connection hardware to protect air lines, power cords, and ABS wiring from dragging, chafing, and road damage.

Frequently Asked Questions About Semi-Truck Safety, Air & Electrical

What air pressure switches and valves are compatible with my specific truck model?

Compatibility depends on your truck's make, model, and year. Most Freightliner Cascadia models (2008-2023) use standard 1/4" NPT air pressure switches rated at 90-120 PSI. Peterbilt 579/389 models typically require 1/8" NPT connections. Kenworth T680/W900 models often use proprietary valve configurations. Always check your truck's service manual for exact specifications, or contact our technical support team with your OEM for precise matching.

How difficult is it to install safety lighting and electrical components myself?

Installation difficulty varies by component. LED marker lights and basic warning lights typically require 30-60 minutes with basic tools and can be DIY-installed by following color-coded wiring (white=ground, black=power). Air horns and pressure gauges require air line connections and may need professional installation to avoid leaks. Complex items like backup cameras or multi-circuit lighting systems often require 2-4 hours and intermediate electrical knowledge. We provide detailed installation guides with each product, and most customers report successful DIY installation for basic components.

What's the actual lifespan of LED safety lights versus traditional bulbs in real-world conditions?

Based on customer feedback and warranty data, quality LED safety lights last 30,000-50,000 hours of operation, which translates to 5-8 years of typical commercial use. Traditional incandescent bulbs average 1,000-2,000 hours (6-12 months). LEDs handle vibration better and maintain brightness longer. However, cheaper LED units may fail within 1-2 years due to poor heat dissipation or inadequate weatherproofing. We recommend DOT-certified LEDs with aluminum housings and IP67 or higher waterproof ratings for maximum longevity.

Which air brake components fail most frequently and what are the warning signs?

The most common failures occur in air dryers (every 2-3 years), pressure protection valves (3-4 years), and gladhand seals (annually). Warning signs include: air dryer constantly purging or not purging at all, slow air pressure build-up taking over 3 minutes to reach 90 PSI, air leaks audible when brakes are released, and moisture in air tanks. Quick-release valves often stick in winter conditions. Regular maintenance with quality replacement parts can extend component life by 30-50%.

What gauge and type of wiring should I use for adding auxiliary lights and accessories?

Wire gauge depends on the accessory's amperage draw and cable run length. For LED marker lights (0.5-2 amps), use 18-16 AWG wire for runs under 15 feet. Work lights and fog lights (3-10 amps) require 14-12 AWG wire. High-powered LED light bars (15-30 amps) need 10 AWG wire with inline fuses. Always use automotive-grade stranded copper wire with SAE J1128 rating for flexibility and heat resistance. Install proper fuses or circuit breakers rated at 125% of the accessory's amp draw. Avoid household solid-core wire as it becomes brittle and cracks from vibration.


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