• May include: Two silver-colored metal cable glands with threaded bodies and hexagonal bases, accompanied by four black rubber O-ring gaskets and two grey plastic locknuts, all arranged in a clear, organized display for industrial hardware.
  • May include: A metallic cable gland with a hexagonal nut and a black rubber gasket, mounted into a gray metal panel. A translucent, deep red flexible tube passes through the center of the fitting, secured by a white internal compression ring.
  • May include: A comparison of two cable glands: a black plastic unit labeled THEIRS and a silver nickel-plated brass unit labeled OURS. The image includes text detailing features like double hex body, extra-long threaded barrel, and double rubber washers.
  • May include: A VoltPassThru parts breakdown diagram showing seven components of a divided structure cable gland: a compression cap, compression bushing, rubber wire seal, main body, two firewall seals, a firewall nut, and an anti-chafe bushing.
  • May include: A VoltPassThru cable management system featuring a nickel-plated brass gland and a threaded anti-chafe bushing. The assembly includes dual NBR seals and a secure locknut, designed to protect a red cable passing through a metal panel.
  • May include: A metallic cable gland featuring a polished silver-tone finish, a threaded cylindrical body, a hexagonal nut, a black rubber gasket, and a grey plastic cap with vertical ridges. The component is designed for securing electrical cables.
  • May include: Two silver-colored metal cable glands with threaded bodies and hexagonal nuts, each featuring a black rubber O-ring gasket. Below the two cable glands are four additional black rubber O-ring gaskets arranged in a horizontal row.
  • May include: A metallic cable gland with a brushed nickel finish secured around a bright red, translucent, multi-strand electrical cable. The cylindrical connector features a threaded body with a hexagonal nut and a domed cap, showing a clean industrial design.
  • May include: A metallic cable gland with a silver-toned finish, featuring a cylindrical body with external threading, a hexagonal nut section, and a black internal sealing component visible at the top opening of the connector hardware.
  • May include: A collection of metal and nylon firewall bushings in various sizes. The top row features four silver-colored metal bushings, while the bottom row displays four black nylon bushings. Text reads METAL & NYLON FIREWALL BUSHINGS.
  • May include: An infographic titled Recommended Cutting Tools for Installing Firewall Grommets displays three tools: two gold-colored step drills, an orange hole saw, and a black knockout punch. Text describes each tool's function and recommended use.
  • May include: A thick red cable and a thinner blue cable passing through a silver metal cable gland. The blue cable splits into two separate strands, each ending in a blue RCA connector with gold-colored pins and black and red accent rings.
  • May include: A metallic cable gland with a brushed nickel finish, featuring a threaded cylindrical body and two hexagonal locking nuts. A thick, glossy red cable with visible internal fibers runs through the center of the metal fitting.
  • May include: A metallic cable gland with a brushed nickel finish, featuring a hexagonal nut and a threaded body. A bright red, translucent, flexible cable passes through the center of the fitting, which includes a black rubber O-ring seal.
  • May include: A metallic cable gland with a threaded cylindrical body and a hexagonal nut, featuring a black rubber O-ring seal. The silver-colored metal fitting is securely attached to a flexible, translucent red cable that curves at the top.
  • May include: Two metallic cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 0 Gauge (1/0 AWG), FITS WIRING OD SIZE: 1/2" - 11/16" (12-18mm), THREAD LENGTH: 11/16" (0.70 in / 18 mm), HOLE SIZE REQUIRED: 1 1/8" (29mm), ALSO FITS: Wire Loom Sizes 1/2", BUILT TO PERFORM. SECURE. VERSATILE. RELIABLE.
  • May include: Two metallic cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 4 Gauge (4 AWG), FITS WIRING OD SIZE: 1/4" - 1/2", THREAD LENGTH: 11/16", HOLE SIZE REQUIRED: 7/8".
  • May include: Two silver-toned metal cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 6-8 Gauge (6-8 AWG), FITS WIRING OD SIZE: 3/16" - 3/8" (5-10 mm), THREAD LENGTH: 9/16" (0.60 in / 15 mm), HOLE SIZE REQUIRED: 3/4" (19mm), ALSO FITS: Wire Loom Sizes 1/4", BUILT TO PERFORM. SECURE. VERSATILE. RELIABLE.
  • May include: Two metallic cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 10, 12, 14, 16 Gauge (10-16 AWG), FITS WIRING OD SIZE: 1/8" - 1/4", THREAD LENGTH: 9/16", HOLE SIZE REQUIRED: 1/2".
  • May include: Two silver-colored metal cable glands with threaded bodies and hexagonal bases, accompanied by four black rubber O-ring gaskets and two grey plastic locknuts, all arranged in a clear, organized display for industrial hardware.
  • May include: A metallic cable gland with a hexagonal nut and a black rubber gasket, mounted into a gray metal panel. A translucent, deep red flexible tube passes through the center of the fitting, secured by a white internal compression ring.
  • May include: A comparison of two cable glands: a black plastic unit labeled THEIRS and a silver nickel-plated brass unit labeled OURS. The image includes text detailing features like double hex body, extra-long threaded barrel, and double rubber washers.
  • May include: A VoltPassThru parts breakdown diagram showing seven components of a divided structure cable gland: a compression cap, compression bushing, rubber wire seal, main body, two firewall seals, a firewall nut, and an anti-chafe bushing.
  • May include: A VoltPassThru cable management system featuring a nickel-plated brass gland and a threaded anti-chafe bushing. The assembly includes dual NBR seals and a secure locknut, designed to protect a red cable passing through a metal panel.
  • May include: A metallic cable gland featuring a polished silver-tone finish, a threaded cylindrical body, a hexagonal nut, a black rubber gasket, and a grey plastic cap with vertical ridges. The component is designed for securing electrical cables.
  • May include: Two silver-colored metal cable glands with threaded bodies and hexagonal nuts, each featuring a black rubber O-ring gasket. Below the two cable glands are four additional black rubber O-ring gaskets arranged in a horizontal row.
  • May include: A metallic cable gland with a brushed nickel finish secured around a bright red, translucent, multi-strand electrical cable. The cylindrical connector features a threaded body with a hexagonal nut and a domed cap, showing a clean industrial design.
  • May include: A metallic cable gland with a silver-toned finish, featuring a cylindrical body with external threading, a hexagonal nut section, and a black internal sealing component visible at the top opening of the connector hardware.
  • May include: A collection of metal and nylon firewall bushings in various sizes. The top row features four silver-colored metal bushings, while the bottom row displays four black nylon bushings. Text reads METAL & NYLON FIREWALL BUSHINGS.
  • May include: An infographic titled Recommended Cutting Tools for Installing Firewall Grommets displays three tools: two gold-colored step drills, an orange hole saw, and a black knockout punch. Text describes each tool's function and recommended use.
  • May include: A thick red cable and a thinner blue cable passing through a silver metal cable gland. The blue cable splits into two separate strands, each ending in a blue RCA connector with gold-colored pins and black and red accent rings.
  • May include: A metallic cable gland with a brushed nickel finish, featuring a threaded cylindrical body and two hexagonal locking nuts. A thick, glossy red cable with visible internal fibers runs through the center of the metal fitting.
  • May include: A metallic cable gland with a brushed nickel finish, featuring a hexagonal nut and a threaded body. A bright red, translucent, flexible cable passes through the center of the fitting, which includes a black rubber O-ring seal.
  • May include: A metallic cable gland with a threaded cylindrical body and a hexagonal nut, featuring a black rubber O-ring seal. The silver-colored metal fitting is securely attached to a flexible, translucent red cable that curves at the top.
  • May include: Two metallic cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 0 Gauge (1/0 AWG), FITS WIRING OD SIZE: 1/2" - 11/16" (12-18mm), THREAD LENGTH: 11/16" (0.70 in / 18 mm), HOLE SIZE REQUIRED: 1 1/8" (29mm), ALSO FITS: Wire Loom Sizes 1/2", BUILT TO PERFORM. SECURE. VERSATILE. RELIABLE.
  • May include: Two metallic cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 4 Gauge (4 AWG), FITS WIRING OD SIZE: 1/4" - 1/2", THREAD LENGTH: 11/16", HOLE SIZE REQUIRED: 7/8".
  • May include: Two silver-toned metal cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 6-8 Gauge (6-8 AWG), FITS WIRING OD SIZE: 3/16" - 3/8" (5-10 mm), THREAD LENGTH: 9/16" (0.60 in / 15 mm), HOLE SIZE REQUIRED: 3/4" (19mm), ALSO FITS: Wire Loom Sizes 1/4", BUILT TO PERFORM. SECURE. VERSATILE. RELIABLE.
  • May include: Two metallic cable glands shown in expanded and compressed states. Text includes: ADJUSTS TO FIT MANY BRANDS OF CABLE, EXPANDED, COMPRESSED, WIRE SIZE: 10, 12, 14, 16 Gauge (10-16 AWG), FITS WIRING OD SIZE: 1/8" - 1/4", THREAD LENGTH: 9/16", HOLE SIZE REQUIRED: 1/2".
Report this item to Etsy

2 Metal Firewall Grommet Bushings 0 2 4 6 8 10 Gauge AWG Waterproof Wire Cable Pass Through for Car Audio Amp Installer Camper Van DIY Solar

Item highlights

  • Materials: Metal, Nylon, Rubber

Seller's description

Build a safer, cleaner cable pass-through for your camper van, RV, off-grid solar system, or car audio installation.

These heavy-duty metal firewall grommets securely route electrical cables through vehicle firewalls, floor pans, plywood walls, battery boxes, speaker enclosures, and other panels while helping protect the wire from sharp edges, vibration, moisture, and chafing.

Unlike basic rubber or plastic snap-in grommets that may crack, loosen, rot, or pop out, each pass-through features a corrosion-resistant nickel-plated brass body, an adjustable polyamide compression insert, and two nitrile rubber sealing washers. The threaded design locks securely to the panel and provides a clean, professional-looking installation.

WHY INSTALLERS CHOOSE THESE FIREWALL GROMMETS

• Secure Compression Fit
The threaded cap compresses around the cable or wire loom to help hold it firmly in place.

• Water-, Dust- and Air-Resistant Seal
The internal compression insert and dual rubber washers help block water, dust, fumes, road noise, and unwanted air leakage when properly installed.

• Extra-Long Threaded Barrel
Designed for thicker mounting surfaces, including double-wall firewalls, van cabinetry, wood panels, floorboards, battery boxes, and MDF speaker enclosures.

• Heat- and Vibration-Resistant Construction
Suitable for demanding automotive, marine, RV, solar, and off-grid electrical installations.

• Clean, Finished Appearance
Creates a professional pass-through for amplifier power wire, battery cable, solar wiring, grounding cable, and protective wire loom.

SELECT YOUR SIZE FROM THE DROPDOWN

Always measure the actual outside diameter of your cable before ordering. Wire insulation thickness varies by manufacturer, so gauge size alone does not guarantee fit.

SELECT YOUR SIZE FROM THE DROPDOWN
Always measure the actual outside diameter of your cable before ordering. Wire insulation thickness varies heavily by manufacturer, so gauge size alone does not guarantee fit.

• 00 Gauge / 2/0 AWG
Cable OD: 1/2"–11/16" (12–18 mm) | Required Hole: 1-1/8" (29 mm) | Max Panel Thickness: 11/16" (17.5 mm)

• 0 Gauge / 1/0 AWG
Cable OD: 1/2"–11/16" (12–18 mm) | Required Hole: 1-1/8" (29 mm) | Max Panel Thickness: 11/16" (17.5 mm)

• 2 Gauge / 2 AWG
Cable OD: 1/4"–1/2" (6–13 mm) | Required Hole: 7/8" (21 mm) | Max Panel Thickness: 1/2" (12.7 mm)

• 4 Gauge / 4 AWG
Cable OD: 1/4"–1/2" (6–13 mm) | Required Hole: 7/8" (21 mm) | Max Panel Thickness: 1/2" (12.7 mm)

• 6 Gauge / 6 AWG
Cable OD: 3/16"–3/8" (5–10 mm) | Required Hole: 3/4" (19 mm) | Max Panel Thickness: 3/8" (9.5 mm)

• 8 Gauge / 8 AWG
Cable OD: 3/16"–3/8" (5–10 mm) | Required Hole: 3/4" (19 mm) | Max Panel Thickness: 3/8" (9.5 mm)

• 10, 12, 14 or 16 Gauge
Cable OD: 1/8"–1/4" (3–6.5 mm) | Required Hole: 1/2" (13 mm) | Max Panel Thickness: 5/16" (8 mm)

PRODUCT SPECIFICATIONS

• Body Material: Polished nickel-plated brass
• Internal Compression Insert: Polyamide
• Sealing Washers: Nitrile rubber
• Operating Temperature: -40°F to 220°F / -40°C to 104°C
• Quantity: Two complete firewall grommets per kit
• Suitable For: Cable, insulated wire, battery cable, amplifier power wire, grounding cable, and compatible wire loom

WHAT IS INCLUDED

• Two metal firewall grommet assemblies
• Four rubber sealing washers
• Step-by-step installation guide

COMMON APPLICATIONS

• Camper van and RV conversions
• Off-grid solar and battery systems
• Car audio amplifier installations
• Vehicle firewall and floor-pan cable routing
• Battery boxes and electrical enclosures
• MDF subwoofer and speaker boxes
• Marine and utility electrical projects
• Plywood, plastic, sheet metal, and wood panels

INSTALLATION NOTE

Measure the cable’s outside diameter and verify the required mounting-hole size before drilling. Test-fit all components before final installation. The maximum usable panel thickness may vary slightly depending on washer placement and installation method.

Questions about sizing? Send us your cable gauge, measured outside diameter, panel thickness, and intended application, and we will help you select the best option.

Get a secure, professional-looking cable pass-through for your amplifier, battery, solar, RV, or camper-van wiring project. Orders ship from Utah within two business days.

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Shop review

Why this review appears

All reviews are from verified buyers. This review is shown automatically based on factors like recency, whether it includes comments, your chosen language, and whether the rating reflects the typical experience with the shop.

“Glad I found this online, my favorite.”

SuzAnne

May 3, 2020

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In 5 carts

Price:$14.95+

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You can only make an offer when buying a single item

Shipping & return policies
  • Get it by
    Nov 16-18
  • Returns & exchanges
    Accepted within 60 days
  • Cost to ship
    FREE to United States, 43215.

Seller's description

Specifications

May include: Two silver-colored metal cable glands with threaded bodies and hexagonal bases, accompanied by four black rubber O-ring gaskets and two grey plastic locknuts, all arranged in a clear, organized display for industrial hardware.

Build a safer, cleaner cable pass-through for your camper van, RV, off-grid solar system, or car audio installation.

These heavy-duty metal firewall grommets securely route electrical cables through vehicle firewalls, floor pans, plywood walls, battery boxes, speaker enclosures, and other panels while helping protect the wire from sharp edges, vibration, moisture, and chafing.

Unlike basic rubber or plastic snap-in grommets that may crack, loosen, rot, or pop out, each pass-through features a corrosion-resistant nickel-plated brass body, an adjustable polyamide compression insert, and two nitrile rubber sealing washers. The threaded design locks securely to the panel and provides a clean, professional-looking installation.

WHY INSTALLERS CHOOSE THESE FIREWALL GROMMETS

• Secure Compression Fit
The threaded cap compresses around the cable or wire loom to help hold it firmly in place.

• Water-, Dust- and Air-Resistant Seal
The internal compression insert and dual rubber washers help block water, dust, fumes, road noise, and unwanted air leakage when properly installed.

• Extra-Long Threaded Barrel
Designed for thicker mounting surfaces, including double-wall firewalls, van cabinetry, wood panels, floorboards, battery boxes, and MDF speaker enclosures.

• Heat- and Vibration-Resistant Construction
Suitable for demanding automotive, marine, RV, solar, and off-grid electrical installations.

• Clean, Finished Appearance
Creates a professional pass-through for amplifier power wire, battery cable, solar wiring, grounding cable, and protective wire loom.

SELECT YOUR SIZE FROM THE DROPDOWN

Always measure the actual outside diameter of your cable before ordering. Wire insulation thickness varies by manufacturer, so gauge size alone does not guarantee fit.

SELECT YOUR SIZE FROM THE DROPDOWN
Always measure the actual outside diameter of your cable before ordering. Wire insulation thickness varies heavily by manufacturer, so gauge size alone does not guarantee fit.

• 00 Gauge / 2/0 AWG
Cable OD: 1/2"–11/16" (12–18 mm) | Required Hole: 1-1/8" (29 mm) | Max Panel Thickness: 11/16" (17.5 mm)

• 0 Gauge / 1/0 AWG
Cable OD: 1/2"–11/16" (12–18 mm) | Required Hole: 1-1/8" (29 mm) | Max Panel Thickness: 11/16" (17.5 mm)

• 2 Gauge / 2 AWG
Cable OD: 1/4"–1/2" (6–13 mm) | Required Hole: 7/8" (21 mm) | Max Panel Thickness: 1/2" (12.7 mm)

• 4 Gauge / 4 AWG
Cable OD: 1/4"–1/2" (6–13 mm) | Required Hole: 7/8" (21 mm) | Max Panel Thickness: 1/2" (12.7 mm)

• 6 Gauge / 6 AWG
Cable OD: 3/16"–3/8" (5–10 mm) | Required Hole: 3/4" (19 mm) | Max Panel Thickness: 3/8" (9.5 mm)

• 8 Gauge / 8 AWG
Cable OD: 3/16"–3/8" (5–10 mm) | Required Hole: 3/4" (19 mm) | Max Panel Thickness: 3/8" (9.5 mm)

• 10, 12, 14 or 16 Gauge
Cable OD: 1/8"–1/4" (3–6.5 mm) | Required Hole: 1/2" (13 mm) | Max Panel Thickness: 5/16" (8 mm)

PRODUCT SPECIFICATIONS

• Body Material: Polished nickel-plated brass
• Internal Compression Insert: Polyamide
• Sealing Washers: Nitrile rubber
• Operating Temperature: -40°F to 220°F / -40°C to 104°C
• Quantity: Two complete firewall grommets per kit
• Suitable For: Cable, insulated wire, battery cable, amplifier power wire, grounding cable, and compatible wire loom

WHAT IS INCLUDED

• Two metal firewall grommet assemblies
• Four rubber sealing washers
• Step-by-step installation guide

COMMON APPLICATIONS

• Camper van and RV conversions
• Off-grid solar and battery systems
• Car audio amplifier installations
• Vehicle firewall and floor-pan cable routing
• Battery boxes and electrical enclosures
• MDF subwoofer and speaker boxes
• Marine and utility electrical projects
• Plywood, plastic, sheet metal, and wood panels

INSTALLATION NOTE

Measure the cable’s outside diameter and verify the required mounting-hole size before drilling. Test-fit all components before final installation. The maximum usable panel thickness may vary slightly depending on washer placement and installation method.

Questions about sizing? Send us your cable gauge, measured outside diameter, panel thickness, and intended application, and we will help you select the best option.

Get a secure, professional-looking cable pass-through for your amplifier, battery, solar, RV, or camper-van wiring project. Orders ship from Utah within two business days.

  • Materials
    Metal, nylon, rubber

Delivery details and policies

  • Get it by
    Nov 16-18
  • Returns and exchanges
    Accepted within 60 days
  • Ships from
    Hooper, UT
  • Cost to ship
    FREE to United States, 43215

    There was a problem calculating your shipping. Please try again.

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Meet your seller

Rockinprices
RockinPrices ·

United States

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience. 5.0
·
106 sales
·
9 years on Etsy

Disclaimer: Etsy assumes no responsibility for the accuracy, labeling, or content of sellers' listings and products. Electrical or electronic products may pose a risk of fire or electrocution. Vintage, handmade, refurbished, or modified electrical or electronic products may not meet current safety standards and may not be in safe working order. Inspect carefully before use and message the seller if you have concerns relating to the product. Do not use a vintage electrical or electronic item if its safety cannot be verified. To reduce the risk of fire, never leave vintage electrical or electronic products plugged in unattended. See Etsy's Terms of Use for more information.

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