170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer
Rubber Grommet Set 170 Pcs | 5–20mm Cable Gland Wire Protection
170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer
170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer
170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer
170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer
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170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYerRubber Grommet Set 170 Pcs | 5–20mm Cable Gland Wire Protection170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer170pcs 5 - 20mm cable gland body plugs rubber grommets rubber plugs car - HomeDIYer

Rubber Grommet Set 170 Pcs | 5–20mm Cable Gland Wire Protection

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HomeDIYer
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By HomeDIYer®

Material: Rubber
Quantities: 170PCS
Price:
$22.97 USD $29.69 USD
Stock:
In stock (98 units), ready to be shipped

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Description

Rubber Grommet Set 170 Pcs — 5–20mm Cable Gland Wire Protection for Automotive, Electrical & DIY

Running cables and wires through metal panels without protection causes insulation damage from sharp edges—leading to shorts, abrasion failures, and safety hazards over time. These rubber grommets seat into the hole and create a smooth, rounded channel that protects the cable or wire from the panel edge on both sides.

Made from durable, heat-resistant rubber, the grommets can be used as-is for dust and debris sealing, or the inner disc can be cut out to create a clean cable pass-through opening. Available in seven sizes from 5×7 mm to 20×25 mm (inner diameter × outer diameter), with 170 pieces total organized in a transparent plastic case with a sizing chart on the lid. UV-resistant and flame-retardant rubber construction.

Use the smaller sizes (5–9 mm) for single wire and thin cable pass-throughs in automotive wiring harnesses and home electrical work; the mid-range sizes (14–18 mm) for multi-wire bundles and conduit entries; and the larger sizes (20 mm) for thicker cables, hoses, and pipe entries through panels.

✅ Fits round holes from 7 mm to 25 mm outer diameter — inner disc cuttable for cable pass-through — suitable for metal, plastic, and wood panels

✅ Key Features of This Rubber Grommet Set

  • 📦 170-Piece Assortment, 7 Sizes: Covers 5×7 mm, 7×9 mm, 9×12 mm, 14×16 mm, 15×20 mm, 18×22 mm, and 20×25 mm (inner × outer diameter)—the most common cable gland sizes for automotive, electrical, and general DIY applications in one kit.
  • 🔄 Double-Sided Wire Protection: The grommet seats flush in the panel hole and protects the cable from sharp metal edges on both the entry and exit sides—prevents insulation abrasion, cuts, and shorts at the panel pass-through point.
  • ✂️ Cuttable Inner Disc: Each grommet ships with a solid inner disc that can be left intact for dust sealing or cut out with a knife to create a clean cable pass-through opening sized to your wire or cable diameter.
  • 🌡️ Heat-Resistant & Flame-Retardant: Rubber construction withstands high temperatures and resists flame spread—suitable for engine bay wiring, industrial machinery, and other high-temperature environments.
  • ☀️ UV-Resistant: Rubber compound is not degraded by UV radiation—maintains flexibility and sealing performance in outdoor and underbody automotive applications exposed to sunlight.
  • 🔍 Transparent Organizer Case with Size Chart: All 170 pieces are sorted by size in a clear plastic storage box with a sizing chart printed on the lid—identify and retrieve the right size without emptying the kit.

📦 What’s in the Box

  • 5×7 mm × 50 pieces
  • 7×9 mm × 40 pieces
  • 9×12 mm × 30 pieces
  • 14×16 mm × 20 pieces
  • 15×20 mm × 10 pieces
  • 18×22 mm × 10 pieces
  • 20×25 mm × 10 pieces
  • Transparent plastic organizer case with size chart × 1

🎯 Who Is This For?

🚗 Automotive Wiring & Body Panel Work

Protect wiring harnesses passing through firewall, floor pan, and body panel holes—the rubber grommet eliminates metal-to-edge contact that causes insulation wear and electrical faults over time.

🏠 Home Electrical & Wall Cable Entry

Seal and protect cables entering through wall holes, junction boxes, and appliance housings—cut the inner disc to the cable diameter for a snug, dust-sealed pass-through.

🏭 Industrial Machinery & Plumbing

Protect cables and hoses passing through machine panels, cylinders, valves, and pump housings—the heat-resistant and UV-stable rubber handles demanding industrial environments.

Material Rubber (heat-resistant, flame-retardant, UV-resistant)
Color Black
Total Quantity 170 pieces
Sizes (Inner × Outer Diameter) 5×7 mm, 7×9 mm, 9×12 mm, 14×16 mm, 15×20 mm, 18×22 mm, 20×25 mm
Type Cable gland grommet with cuttable inner disc
Mounting Type Press-fit into panel hole
Storage Transparent plastic organizer case with size chart
Application Automotive wiring, electrical panels, wall cable entry, industrial machinery, plumbing, valves, pumps

❓ Frequently Asked Questions

How do I select the right grommet size for my hole and cable?

The size notation is inner diameter × outer diameter. The outer diameter is the hole size in your panel—select a grommet whose outer diameter matches your hole. The inner diameter is the opening after cutting the inner disc—select a size where the inner diameter is close to your cable or wire bundle diameter for a snug fit. If your cable is between two inner sizes, size up and the rubber will compress around the cable.

How do I cut the inner disc to create a cable pass-through?

Use a sharp utility knife or scissors. Place the grommet on a flat surface and cut around the inner disc following the molded groove or the inner edge of the grommet body. Remove the disc and insert your cable through the opening. The rubber will compress slightly around the cable to create a snug, sealed fit.

Can these grommets be used without cutting for dust sealing?

Yes. If you leave the inner disc intact, the grommet functions as a closed blind plug that seals the hole against dust, moisture, and debris—the same as a standard blanking grommet. Cut the disc only when you need a cable pass-through opening.

Are these suitable for automotive engine bay use?

Yes. The heat-resistant and flame-retardant rubber handles the elevated temperatures found in engine bay environments. The UV-resistant compound also maintains flexibility in underbody and exterior panel applications exposed to sunlight. For direct contact with exhaust components or surfaces exceeding the rubber’s rated temperature, a silicone grommet would be more appropriate.

Will these fit holes in sheet metal panels?

Yes. The rubber flange presses into the hole and grips the panel edge on both sides. It is suitable for sheet metal, plastic, and wood panels. Ensure the panel thickness is within the grommet groove depth for a flush, secure seat on both faces of the panel.

Why are there more pieces in the smaller sizes?

Smaller sizes (5×7 mm and 7×9 mm) are the most frequently used in automotive wiring harness and home electrical work, so the kit includes 50 and 40 pieces respectively. Larger sizes are used less often per project, so 10–20 pieces per size covers most applications without excess.

🛒 Add to cart above to get the full 170-piece set.

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