170 x Rubber grommet set blind plug rubber plug sealing cap body plug - HomeDIYer

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Rubber Grommet Set 170 Pcs | 7 Sizes, Blind Plug & Sealing Cap

Name: Rubber Grommet Set 170 Pcs | 7 Sizes, Blind Plug & Sealing Cap
Brand: HomeDIYer
SKU: UKC637
Price: 11.89 USD
Availability: InStock

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Rubber Grommet Set 170 Pcs — 7-Size Blind Plug & Sealing Cap Assortment for Automotive, Electrical & Plumbing

Sourcing individual rubber grommets in the right size for each job wastes time and often means ordering multiple packs. This 170-piece rubber grommet set covers seven of the most common hole sizes in a single kit—so the right size is always on hand for automotive repairs, electrical enclosure work, plumbing connections, and general DIY projects.

All 170 pieces are made from black rubber with strong tensile strength and good flexibility. The closed blind plug design seals holes completely, protecting cables, wires, and pipes from metal-to-metal contact, abrasion, moisture, and debris. The set is stored in a transparent plastic organizer box for easy size identification and access. Operating temperature range: -40°C to +100°C.

Use the smaller sizes (7.14–12.07 mm) for wiring harness pass-throughs and electrical panel knockouts; the mid-range sizes (15.88–19.05 mm) for automotive firewall and body panel holes; and the larger sizes (22.23–25.40 mm) for plumbing, valve, and pump port blanking.

✅ Fits round holes from 7.14 mm to 25.40 mm — flush-mount press-fit installation — suitable for metal, plastic, and wood panels

✅ Key Features of This Rubber Grommet Set

📦 170-Piece Assortment, 7 Sizes: Covers 7.14 mm, 9.53 mm, 12.07 mm, 15.88 mm, 19.05 mm, 22.23 mm, and 25.40 mm—the most common hole sizes across automotive, electrical, and plumbing applications in a single kit.
🧲 High-Tensile Rubber Construction: Strong, flexible rubber resists tearing during installation and maintains its seal under vibration, temperature cycling, and repeated contact—does not harden or crack within the rated temperature range.
🔵 Closed Blind Plug Design: Fully seals the hole without a cable pass-through opening—prevents dust, moisture, oil, and debris from entering through unused or blanked holes in panels and enclosures.
⚡ Cable & Wire Protection: Rubber body prevents metal-to-metal contact between cables and panel edges—insulates and protects wiring harnesses passing through sharp-edged holes in automotive and electrical applications.
🌡️ Wide Temperature Range: Rated from -40°C to +100°C—suitable for engine bay, underbody, and outdoor electrical enclosure applications where temperature extremes are common.
🔍 Transparent Organizer Box: All 170 pieces are sorted by size in a clear plastic storage box—identify and retrieve the right size quickly without emptying the entire kit.

📦 What’s in the Box

7.14 mm × 50 pieces
9.53 mm × 40 pieces
12.07 mm × 30 pieces
15.88 mm × 20 pieces
19.05 mm × 10 pieces
22.23 mm × 10 pieces
25.40 mm × 10 pieces
Transparent plastic organizer box × 1

🎯 Who Is This For?

🚗 Automotive Repair & Restoration

Blank unused holes in firewall panels, floor pans, and body panels—or protect wiring harnesses passing through sharp panel edges. The 7-size range covers most standard automotive hole sizes.

⚡ Electrical Enclosures & Control Panels

Seal unused knockout holes in electrical enclosures and distribution boards to maintain IP rating integrity—or use as cable pass-through protection on wiring entering metal enclosures.

🔧 Plumbing, Valves & General DIY

Blank open ports on cylinders, valves, pumps, and water pipe fittings during repair or storage—the larger sizes (22–25 mm) suit common plumbing and hydraulic port dimensions.

Material	Rubber
Color	Black
Total Quantity	170 pieces
Sizes Included	7.14 mm, 9.53 mm, 12.07 mm, 15.88 mm, 19.05 mm, 22.23 mm, 25.40 mm
Type	Closed blind plug / sealing cap
Mounting Type	Flush mount, press-fit
Temperature Range	-40°C to +100°C (-40°F to +212°F)
Storage	Transparent plastic organizer box
Application	Automotive, electrical enclosures, plumbing, valves, pumps, general DIY

❓ Frequently Asked Questions

How do I measure my hole to select the right grommet size?

Measure the diameter of the hole in your panel using a caliper or ruler. Select the grommet size that matches or is very slightly larger than your hole diameter—the rubber flange compresses against the hole edge to create a secure press-fit seal. If your hole falls between two sizes, size up for a tighter fit.

Are these open-center grommets or closed blind plugs?

These are closed blind plugs—they fully seal the hole with no opening for cables or wires. They are designed for blanking unused holes. If you need a grommet with a cable pass-through opening, you would need an open-center grommet instead.

Will these fit holes in metal automotive panels?

Yes. The rubber flange is designed to press-fit into holes in sheet metal, plastic, and wood panels. The rubber compresses against the hole edge to create a secure, rattle-free fit. Ensure the panel thickness falls within the grommet groove depth for a flush seat on both sides.

What is the temperature rating and is it suitable for engine bay use?

The grommets are rated from -40°C to +100°C. This covers most engine bay ambient temperatures for firewall and body panel applications. For direct contact with exhaust components or surfaces exceeding 100°C, a silicone grommet rated for higher temperatures would be more appropriate.

Can I reuse the grommets after removal?

Yes. The press-fit design allows grommets to be removed by hand or with a flat tool inserted under the flange edge. The rubber retains its shape after removal and can be reinserted in the same or a different hole of the same size.

Why are there more pieces in the smaller sizes?

Smaller hole sizes (7.14 mm and 9.53 mm) are the most commonly used in automotive wiring harness and electrical panel applications, so the kit includes more of these sizes (50 and 40 pieces respectively). Larger sizes are used less frequently, so 10–20 pieces per size is sufficient for most projects.

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

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Solid Brass, But Disc Edge Very Rough

Solid brass as advertised, but disc edge is very rough from punch tool and will require filing and polishing to look as good as shown in photos.

The copper was clean and straight

The copper was clean and straight, but the brass wire was all kinky and not in a straight spiral definitely would’ve been nicer to Not have the Brass bent up

Hi Joshua, thank you for your feedback. We're glad you liked the copper wire. Due to packaging constraints, some wires may arrive bent. We appreciate your understanding. Thanks for shopping with us!

Wheelchair caster nut cap was missing

Hospice had given us a wheelchair that the caster nut cap was missing. So I replaced it with the 28mm tube cap. It was of good quality, sturdy and fit perfect. shipping was fast too.

Although it is marked 32-35

Although it is marked 32-35, it is only 15mm, which is of zero use for me.

Perfect they are really made well and I used them for my car

Perfect they are really made well and I used them for my car. The only thing I had a great for us. It took three weeks to get here. So shipping was slow.

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Rubber Grommet Set 170 Pcs | 7 Sizes, Blind Plug & Sealing Cap

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DIY Expert Support

Description

Rubber Grommet Set 170 Pcs — 7-Size Blind Plug & Sealing Cap Assortment for Automotive, Electrical & Plumbing

✅ Key Features of This Rubber Grommet Set

📦 What’s in the Box

🎯 Who Is This For?

❓ Frequently Asked Questions

Rubber Grommet Set 170 Pcs | 7 Sizes, Blind Plug & Sealing Cap

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