Rubber Grommet & Hole Plug Set — 200-Piece Assortment for Firewall, Electrical & DIY Sealing
Exposed holes in your car firewall, electrical panel, or workshop project are more than an eyesore — they let in dust, fumes, vibration, and moisture that can damage wiring and reduce safety. This 200pcs Rubber Grommet & Hole Plug Kit gives you the right size for virtually every job, so you can seal, insulate, and protect wires or pipes from sharp metal edges in one go. 🚗🏠
The kit contains two functional types: rubber grommets (open-center, with a wire channel for routing cables through panels) and rubber hole plugs (solid-center, for completely sealing unused openings). All pieces are made from durable, flexible black rubber, offering excellent resistance to wear, tear, and heat. Seven sizes are included — 7.14 mm (7/25"), 9.53 mm (3/8"), 12.07 mm (1/2"), 15.88 mm (5/8"), 19.05 mm (3/4"), 22.23 mm (7/8"), and 25.4 mm (1") — organized in a reusable plastic storage case.
Whether you need rubber hole plugs for your car firewall, rubber grommets for an electrical enclosure, or rubber expansion plugs for general sealing, this assortment covers automotive repair, home electrical work, HVAC, marine, and general DIY projects with a single purchase.
✅ Compatible with standard round panel holes from 7.14 mm to 25.4 mm (7/25" to 1") — fits automotive firewalls, electrical boxes, metal panels, wood, and plastic enclosures.
Key Features
- 🔢 200-piece assortment across 7 sizes — 80×7.14 mm, 40×9.53 mm, 30×12.07 mm, 20×15.88 mm, 10×19.05 mm, 10×22.23 mm, 10×25.4 mm, covering the most common panel hole diameters in one kit.
- 🔄 Two functional types in one kit — open-center rubber grommets for routing wires and cables, plus solid-center hole plugs for completely sealing unused openings, giving you versatility for any project.
- 🛡️ Durable, flexible rubber construction — made from high-quality flexible rubber that resists wear, tear, and heat, protecting wires and cables from sharp metal edges and preventing abrasion damage.
- 🚗 Firewall & automotive ready — rubber hole plugs seal openings in car firewalls, preventing dust, exhaust fumes, and road noise from entering the cabin; grommets protect wiring harnesses passing through metal panels.
- ♻️ Reusable and tool-free installation — flexible rubber snaps into place by hand; to route a cable through a plug, simply use a knife to make a suitable cut, then insert the cable. Pieces can be removed and reused depending on the application.
- 📦 Organized storage case included — all 200 pieces are sorted by size in a clear plastic compartment case, making it easy to find the right size on the job and store leftovers for future use.
What's in the Box
- 80 × Rubber Grommet / Hole Plug — 7.14 mm (7/25")
- 40 × Rubber Grommet / Hole Plug — 9.53 mm (3/8")
- 30 × Rubber Grommet / Hole Plug — 12.07 mm (1/2")
- 20 × Rubber Grommet / Hole Plug — 15.88 mm (5/8")
- 10 × Rubber Grommet / Hole Plug — 19.05 mm (3/4")
- 10 × Rubber Grommet / Hole Plug — 22.23 mm (7/8")
- 10 × Rubber Grommet / Hole Plug — 25.4 mm (1")
- 1 × Reusable plastic storage case
Who Is This For
🚗 Automotive DIYers & Mechanics — Seal firewall pass-throughs, protect wiring harnesses from sharp sheet metal edges, and block unused holes in engine bays, door panels, and floor pans.
⚡ Electricians & Electrical Hobbyists — Route cables cleanly through electrical enclosures, junction boxes, and control panels while protecting insulation from abrasion and meeting code requirements for cable protection.
🔧 Home Workshop & General DIY — Plug unused holes in metal shelving, workbenches, HVAC ducts, and appliance panels; keep your workspace tidy and prevent debris from passing through openings.
🎁 Maintenance & Facilities Teams — Keep a full assortment on hand for quick repairs across multiple hole sizes without ordering individual parts — the organized case makes it easy to grab the right size fast.
Technical Specifications
| Quantity |
200 pcs (assorted sizes) |
| Material |
Flexible rubber |
| Color |
Black |
| Size Range |
7.14 mm – 25.4 mm (7/25" – 1") |
| Size Breakdown |
7.14 mm / 7/25" × 80 pcs | 9.53 mm / 3/8" × 40 pcs | 12.07 mm / 1/2" × 30 pcs | 15.88 mm / 5/8" × 20 pcs | 19.05 mm / 3/4" × 10 pcs | 22.23 mm / 7/8" × 10 pcs | 25.4 mm / 1" × 10 pcs |
| Types Included |
Rubber grommets (open-center, for wire routing) + Rubber hole plugs (solid-center, for sealing) |
| Applications |
Firewall sealing, wire & cable protection, automotive repair, electrical enclosures, HVAC, marine, general DIY |
| Storage |
Reusable plastic compartment case |
| Weight |
Approx. 0.3 kg |
Frequently Asked Questions
What are rubber plugs used for?
Rubber plugs are mainly used for sealing holes, protecting wires or pipes from sharp edges, and reducing vibration and noise. They are essential in automotive, electrical, and general DIY projects where open panel holes need to be closed or where cables need to pass through metal safely.
What is the difference between rubber plugs and rubber grommets?
Rubber plugs (hole plugs) have a solid center and are designed to completely seal an unused hole. Rubber grommets have an open center with a channel that allows wires or cables to pass through while protecting them from sharp edges. This 200-piece set includes both types for maximum versatility.
Can I use rubber hole plugs in automotive firewalls?
Yes! Rubber hole plugs are ideal for sealing openings in car firewalls, preventing dust, exhaust fumes, and road noise from entering the cabin. The grommets in this kit are also suitable for protecting wiring harnesses that pass through firewall openings.
What are rubber expansion plugs?
Rubber expansion plugs are designed to expand when tightened or pressed into place, providing a secure seal in irregular or larger openings. The flexible rubber in this kit allows the plugs to conform snugly to the hole for a reliable fit.
Are these plugs reusable?
Yes, these rubber plugs and grommets can generally be removed and reused depending on the application. Their flexibility and durability make them a reliable long-term choice for both permanent installations and temporary sealing needs.
How do I install a rubber grommet to route a cable through a panel?
Installation is straightforward: (1) Choose the appropriate size grommet for your drilled hole. (2) If routing a cable through a solid plug, use a knife to make a suitable cut in the center. (3) Snap the grommet into the hole and insert the cable. No tools are required to seat the grommet — it presses in by hand.
What sizes are included and how many of each?
The kit includes 7 sizes: 7.14 mm (7/25") × 80 pcs, 9.53 mm (3/8") × 40 pcs, 12.07 mm (1/2") × 30 pcs, 15.88 mm (5/8") × 20 pcs, 19.05 mm (3/4") × 10 pcs, 22.23 mm (7/8") × 10 pcs, and 25.4 mm (1") × 10 pcs — 200 pieces total.
Need to seal, protect, or route? This 200-piece rubber grommet and hole plug assortment has you covered across 7 sizes — add it to your cart and be ready for your next automotive, electrical, or DIY project.
