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Grommets, Plugs & Harnesses
UnitedBuilt’s Grommets, Plugs & Harnesses collection includes lighting installation components used to mount, connect, and service vehicle lights on water trucks, service trucks, commercial vehicles, trailers, and equipment. This collection includes rubber grommets, light plugs, pigtails, connectors, wiring harnesses, and related lighting repair components.
These parts are commonly used with DOT lights, marker lights, clearance lights, stop/turn/tail lights, backup lights, work lights, and other vehicle lighting assemblies. Proper grommets, plugs, and harnesses help protect lighting connections, support clean installation, and make future service or replacement easier.
UnitedBuilt stocks and distributes Peterson Manufacturing grommets, plugs, pigtails, and harness components used in water truck lighting systems, fleet maintenance, commercial vehicle repairs, and equipment upfits.
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203 in stockLight Harness, Rearsill, 6-Lamp, UnitedBuilt RA4610-B
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$78.51$78.51 - $78.51Current price $78.51Light Harness, 6-Lamp Rearsill, Pig Tails For (2) Peterson M817C-7 Back-Up Lights, White, and (4) Peterson M826R-7 Stop/Turn/Tail Lights, Red.
Original price $0.00 - Original price $0.00Original price $0.00$78.51$78.51 - $78.51Current price $78.51 -
101 in stockAdapter Harness, Universal, UnitedBuilt AC4656
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$27.20$27.20 - $27.20Current price $27.20Adapter Harness Plug, Universal, UnitedBuilt AC4656
Original price $0.00 - Original price $0.00Original price $0.00$27.20$27.20 - $27.20Current price $27.20 -
98 in stockAdapter Harness, Kenworth, UnitedBuilt AC4657-A
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$24.18$24.18 - $24.18Current price $24.18Adapter Harness Plug, Kenworth, UnitedBuilt AC4657
Original price $0.00 - Original price $0.00Original price $0.00$24.18$24.18 - $24.18Current price $24.18 -
32 in stockLight Harness Kit, Rev 5/2019, UnitedBuilt HK4600 (LITEHARNESS19)
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$129.00$129.00 - $129.00Current price $129.00Light Harness Kit, Rev 5/2019, UnitedBuilt HK4600 INCLUDES: (1) UnitedBuilt RA4610-A Light Harness, 6-Lamp Rearsill, Pig Tails (2) UnitedBuilt M...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$129.00$129.00 - $129.00Current price $129.00 -
570 in stockGrommet, Marker Light, Peterson B142-18
PetersonOriginal price $0.00 - Original price $0.00Original price $0.00$1.35$1.35 - $1.35Current price $1.35Grommet, Round, Open Back, 2.5″, Peterson B142-18 Made in USA. Allows 2 1/2″ diameter sealed units to be flush mounted. Fits 72, 142, 143, 162, 16...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$1.35$1.35 - $1.35Current price $1.35 -
139 in stockPigtail Harness 138", ID Harness, Three Marker Lights, UnitedBuilt ID4613
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$15.97$15.97 - $15.97Current price $15.97Pigtail Harness 138", Three Marker Lights, UnitedBuilt ID4613 For (3) Peterson M163R Marker Lights, Red
Original price $0.00 - Original price $0.00Original price $0.00$15.97$15.97 - $15.97Current price $15.97 -
421 in stockPigtail Harness 36", Single Market Light, UnitedBuilt MK4611 (LITEMK4611)
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$5.49$5.49 - $5.49Current price $5.49Pigtail Harness 36", Single Market Light, UnitedBuilt MK4611 For Peterson M163A Marker Lights, Amber or Peterson M163R Marker Lights, Red
Original price $0.00 - Original price $0.00Original price $0.00$5.49$5.49 - $5.49Current price $5.49 -
0 in stock. Available on backorderAdapter Plug 6", LED 3-Wire, PL3 to AMP, Peterson 417-491
PetersonOriginal price $0.00 - Original price $0.00Original price $0.00$10.00$10.00 - $10.00Current price $10.00Adapter Plug 6", LED 3-Wire, PL3 to AMP, Peterson 417-491
Original price $0.00 - Original price $0.00Original price $0.00$10.00$10.00 - $10.00Current price $10.00 -
3 in stockTrailer Socket 7 Pole Littelfuse 12063
LittelfuseOriginal price $0.00 - Original price $0.00Original price $0.00$66.00$66.00 - $66.00Current price $66.00Trailer Socket 7 Pole Littelfuse 12063
Original price $0.00 - Original price $0.00Original price $0.00$66.00$66.00 - $66.00Current price $66.00 -
3 in stockJunction Box, CLEAR-VU Grey, 7 Wire, Phillips 15-961
PhillipsOriginal price $0.00 - Original price $0.00Original price $0.00$30.76$30.76 - $30.76Current price $30.76Original price $0.00 - Original price $0.00Original price $0.00$30.76$30.76 - $30.76Current price $30.76 -
265 in stockPigtail Harness 90", Single Marker Light, UnitedBuilt MK4612 (LITEMK4612)
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$8.84$8.84 - $8.84Current price $8.84Pigtail Harness 90", Single Market Light, UnitedBuilt MK4612 For Peterson M163A Marker Lights, Amber or Peterson M163R Marker Lights, Red
Original price $0.00 - Original price $0.00Original price $0.00$8.84$8.84 - $8.84Current price $8.84 -
379 in stockGrommet Oval, 6.5x2.25, Peterson 421-18
PetersonOriginal price $0.00 - Original price $0.00Original price $0.00$2.00$2.00 - $2.00Current price $2.00Grommet Oval, 6.5x2.25, Peterson 421-18
Original price $0.00 - Original price $0.00Original price $0.00$2.00$2.00 - $2.00Current price $2.00 -
5 in stockTrailer Socket 4 Pole Cole-Hersee 1232
LittelfuseOriginal price $0.00 - Original price $0.00Original price $0.00$31.72$31.72 - $31.72Current price $31.72Trailer Socket 4 Pole Cole-Hersee 1232
Original price $0.00 - Original price $0.00Original price $0.00$31.72$31.72 - $31.72Current price $31.72 -
15 in stockJunction Box, Black Plast, 7 Terminal Post, Sealco TM38
SealcoOriginal price $0.00 - Original price $0.00Original price $0.00$10.00$10.00 - $10.00Current price $10.00TM38-7 Terminal Junction Box – Durable 7-Terminal Electrical Enclosure The TM38-7 Terminal Junction Box is a robust and reliable electrical junctio...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$10.00$10.00 - $10.00Current price $10.00 -
10 in stockHarness TM53 7-Pin RV Blade Socket, 6" Sealed Shrink Tube, 60" Lead with 8" Stripped Ends, SEALCO FM5703
SealcoOriginal price $0.00 - Original price $0.00Original price $0.00$50.50$50.50 - $50.50Current price $50.50The Sealco TM53 7-Pin RV Blade Socket Harness (FM5703) is a reliable, heavy-duty solution for trailer and towing electrical connections. Designed f...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$50.50$50.50 - $50.50Current price $50.50 -
4 in stockHarness J560 7-Pin Socket, Sealed, Tightening Ring, 60" Lead with EC48 (GRN/YEL/BLK) x EC94 (WHT) x EC43 (BLU/BRN/RED), SEALCO MD55 FM5575
SealcoOriginal price $0.00 - Original price $0.00Original price $0.00$93.50$93.50 - $93.50Current price $93.50The Sealco J560 7-Pin Socket Harness (FM5575) is a heavy-duty, sealed wiring solution built for reliable performance in commercial truck and traile...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$93.50$93.50 - $93.50Current price $93.50 -
15 in stock
Harness J560 7-Pin Socket, Sealed, Tightening Ring, 60" Lead with Stripped Ends, SEALCO MD55 FM5602
SealcoOriginal price $0.00 - Original price $0.00Original price $0.00$52.25$52.25 - $52.25Current price $52.25The Sealco J560 7-Pin Socket Harness (FM5602) is a rugged, sealed electrical connection solution designed for heavy-duty truck and trailer applicat...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$52.25$52.25 - $52.25Current price $52.25 -
0 in stock. Available on backorderPigtail, Stop Tail Turn Three-Wire Plug-In Pigtails for Male Pin Lights, 40/60 Series, Grote 67002-3
UnitedBuiltOriginal price $0.00 - Original price $0.00Original price $0.00$5.14$5.14 - $5.14Current price $5.14Original price $0.00 - Original price $0.00Original price $0.00$5.14$5.14 - $5.14Current price $5.14 -
316 in stockGrommet, Tail/Backup Light, Peterson B426-18
PetersonOriginal price $0.00 - Original price $0.00Original price $0.00$1.75$1.75 - $1.75Current price $1.75Grommet, PVC, 4″, Peterson B426-18 Made in USA. Black PVC grommet flush mounts 4″ diameter round lamps in 4 1/2″ hole. For use with 4″ round stop/...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$1.75$1.75 - $1.75Current price $1.75 -
613 in stockAdapter Plug 6", LED 2-Wire, PL3 to AMP, Peterson B417-481
PetersonOriginal price $0.00 - Original price $0.00Original price $0.00$9.05$9.05 - $9.05Current price $9.05Plug, LED 2-Wire, Adapter 6" B417-481 Made in USA. 2-wire hard-shell, weatherproof plug. For use with 817, 818, 820, 823, 1217, 1218, 1220, 1223 s...
View full detailsOriginal price $0.00 - Original price $0.00Original price $0.00$9.05$9.05 - $9.05Current price $9.05
