What are these rubber grommets primarily used for?

These rubber grommets are primarily used to protect electrical wires from being cut or chafed by sharp metal edges when passing through drilled holes. They are essential safety components for automotive wiring, custom PC building, and general sheet metal fabrication.

How do I choose the correct grommet size for my project?

You must choose a grommet where the groove diameter matches the diameter of the hole you drilled in your panel. The inner diameter of the grommet should also be slightly larger than the thickness of the wire you are passing through it to avoid pinching.

Are these rubber grommets resistant to heat and oil?

These standard rubber grommets offer basic resistance to everyday heat and minor splashes, making them suitable for general automotive and household use. However, they are not rated for extreme high-temperature environments or prolonged submersion in corrosive industrial oils.

How do I install a rubber grommet into a tight metal hole?

To install a grommet into a tight hole, simply fold or squeeze one side of the rubber ring, push it through the hole, and let it snap into place along the groove. If the rubber is too stiff, warming it up with a hairdryer or warm water will make it much more pliable.

125-Piece Rubber Grommet Kit | Wire Protection Assortment

Name: 125-Piece Rubber Grommet Kit | Wire Protection Assortment
Brand: Sun Cheong Computer Company Limited
SKU: 21PS001936
Price: 123.0 TWD
Availability: InStock

Short Product Description

The 125-Piece Rubber Grommet Assortment Kit provides essential wire protection for automotive repairs, plumbing, and DIY PC builds. Featuring 18 popular sizes neatly organized in a resealable plastic case, these durable rubber rings prevent sharp metal edges from slicing through your cables. Available for instant pickup at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po, our staff can help you select the perfect grommet size to ensure your custom electrical enclosures remain safe and short-circuit free.

Key Features

125-Piece Assortment: Provides a massive supply of rubber grommets to handle multiple DIY wiring, plumbing, and hardware projects.
18 Popular Sizes: Includes a wide range of dimensions from 3.2mm to 25mm to fit various panel thicknesses and hole diameters perfectly.
Durable Rubber Construction: Made from flexible, high-quality rubber that resists tearing, heat, and electrical conductivity for maximum safety.
Organized Storage Case: Comes in a clear, resealable plastic box with a built-in sizing chart for quick identification and clutter-free storage.
Ultimate Cable Protection: Effectively prevents sharp metal edges from slicing through wire insulation, eliminating potential fire hazards.

Full Product Description

Comprehensive Wire Protection for DIY Projects

This 125-Piece Rubber Grommet Kit safeguards your electrical wiring from sharp sheet metal edges, preventing dangerous short circuits and wire chafing. Whether you are routing cables through a custom PC chassis, repairing automotive wiring, or building a custom arcade cabinet, these flexible rubber rings provide a secure, insulated seal. The comprehensive assortment ensures you always have the exact size needed on hand to finish your mechanical or electrical modifications safely and professionally.

18 Popular Sizes in a Resealable Case

This Wire Protection Assortment includes 18 of the most commonly used grommet sizes, ranging from 3.2mm to 25mm, covering almost any standard hole diameter you will encounter. Every piece is neatly sorted into designated compartments within a transparent, resealable plastic case, complete with a handy sizing chart printed on the lid. This highly organized setup eliminates the frustration of digging through messy toolboxes, allowing you to find the right O-ring instantly.

Pro Tip from Our Technicians

To ensure a perfectly snug fit, our Sham Shui Po technical team advises measuring the inner diameter of your drilled hole using digital calipers before selecting a grommet. If the rubber feels too stiff to push into a tight metal panel, briefly soaking the grommet in warm water will soften the material for a much easier, snap-in installation. Bring your custom metal enclosures to our physical store, and we can help you test-fit the grommets before you finalize your wiring layout.

Technical Specifications

Product Type: Rubber Grommet Assortment Kit (O-Rings)
Material: Flexible Insulating Rubber
Total Quantity: 125 Pieces
Number of Sizes: 18 Distinct Sizes
Included Sizes (Small): 3.2x6.4mm, 5.6x8mm, 7x12.7mm, 12.7x15mm, 9.5x12mm, 9.5x12.7mm, 8x14.3mm, 9.5x20.6mm, 11x19mm, 16x24.6mm, 19x24mm
Included Sizes (Standard): 7mm, 9mm, 12mm, 16mm, 20mm, 22mm, 25mm
Packaging: Resealable plastic organizer case with size chart

Delivery Options

Local delivery within Hong Kong and in-store pickup.
Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
In-store pickup details (location and time) will be confirmed by email or phone message.
Delivery times are estimates and may be affected by weather or unforeseen circumstances.

FAQ Section

What are these rubber grommets primarily used for?These rubber grommets are primarily used to protect electrical wires from being cut or chafed by sharp metal edges when passing through drilled holes. They are essential safety components for automotive wiring, custom PC building, and general sheet metal fabrication.
How do I choose the correct grommet size for my project?You must choose a grommet where the groove diameter matches the diameter of the hole you drilled in your panel. The inner diameter of the grommet should also be slightly larger than the thickness of the wire you are passing through it to avoid pinching.
Are these rubber grommets resistant to heat and oil?These standard rubber grommets offer basic resistance to everyday heat and minor splashes, making them suitable for general automotive and household use. However, they are not rated for extreme high-temperature environments or prolonged submersion in corrosive industrial oils.
Can I buy this grommet assortment kit at your Hong Kong store?Yes, this 125-Piece Rubber Grommet Assortment Kit is in-stock and available for immediate pickup at Sun Cheong Computer Co. Ltd. (新昌電腦有限公司) in Sham Shui Po. Our store caters to DIY makers and hardware enthusiasts needing reliable wire protection solutions.
How do I install a rubber grommet into a tight metal hole?To install a grommet into a tight hole, simply fold or squeeze one side of the rubber ring, push it through the hole, and let it snap into place along the groove. If the rubber is too stiff, warming it up with a hairdryer or warm water will make it much more pliable.

Target Users / Applications

Custom PC Builders: Routing power supply cables cleanly through metal chassis holes without risking wire damage.
Automotive DIYers: Protecting aftermarket audio or dashcam wiring as it passes through the vehicle's metal firewall.
Arcade Cabinet Makers: Creating clean, professional-looking pass-through holes for joystick and button wiring in wooden or metal control panels.