Heat Shrink Tubing · 3/8 in I.D. - Black - Electrical Insulation - Generic HS.375ID
Black 3/8 in I.D. heat shrink tubing for insulating and protecting wire splices, terminals, and small cable repairs in electrical, automotive, and marine work. Typical selection guidance is to choose tubing that fits over the connection before heating and shrinks tightly after recovery; actual fit depends on shrink ratio, wall thickness, and the finished outside diameter of the splice.
What this product is for
This black heat shrink tubing is used to insulate exposed conductors, cover wire splices, bundle small conductors, and add light mechanical protection to electrical connections. It is commonly used in panel work, control wiring, automotive repairs, trailer wiring, marine service, and general maintenance.
Use for
Use for wire splices, crimp terminals, soldered joints, harness identification, and abrasion protection where a simple shrink sleeve is needed. It is commonly used where the tubing must slide over the connection before heating and recover to a tighter fit after installation.
Avoid for
Avoid using this item where adhesive-lined environmental sealing, certified voltage rating, fuel exposure, or exact shrink ratio is required and not confirmed by the listing. For direct burial, continuous outdoor exposure, or wet sealing applications, verify the tubing material and approval requirements before purchase.
Best for
Best for electricians, maintenance teams, and technical buyers who need a common black heat shrink size for general insulation and wire repair work. A 3/8 in inside diameter is typically chosen for small cable bundles and terminated connections that need more coverage than small-diameter sleeve sizes.
Installed in
Installed in control panels, junction boxes, equipment wiring, vehicles, trailers, boats, and shop repair assemblies. It is also used in OEM and MRO work where clean insulation coverage is needed over irregular connection points.
Why this product exists
Heat shrink tubing provides a fast way to restore insulation, improve identification, and reduce exposure of electrical joints to abrasion and incidental moisture. Compared with tape, it gives a neater finished result and is commonly used where a more secure sleeve fit is preferred.
Compared with similar products
Compared with smaller tubing sizes, 3/8 in I.D. fits larger splices and small cable groupings. Compared with adhesive-lined tubing, standard non-adhesive tubing is typically easier to handle for general insulation but does not provide the same sealing performance. Typical industry offerings in this size are available in 2:1 or 3:1 shrink formats, so confirm the required recovery range before ordering. Actual performance depends on installation conditions, substrate size, heating method, and local electrical code.
Specifications
- Product type: Heat shrink tubing
- Nominal inside diameter: 3/8 in (approximately 9.5 mm)
- Colour: Black
- Application: Electrical insulation and connection protection
- Common uses: Wire splices, terminals, harness repairs, cable bundling
- Material: Not verified for this SKU
- Shrink ratio: Not verified for this SKU
- Adhesive lining: Not verified for this SKU
- Length: Not verified for this SKU
- MaterialNot verified for this SKU
- ColourBlack
- LengthNot verified for this SKU
- Shrink RatioNot verified for this SKU
- ApplicationElectrical insulation and connection protection
- Nominal Inside Diameter3/8 in (approximately 9.5 mm)
- Common UsesWire splices, terminals, harness repairs, cable bundling
- BrandsWhite Label
- Stock in Elmira84
Aptico Supply Delivery
Fast Electrical Supply Delivery Across Ontario
Local delivery routes, pickup options, and contractor-focused service from our Elmira and Flesherton locations.
Delivery Built Around Electrical Contractors
Aptico Supply helps electricians, contractors, and commercial buyers get the electrical materials they need without unnecessary delays. Whether you are ordering for a jobsite, restocking service inventory, or arranging pickup, our delivery options are designed to keep work moving.
Free Daily Delivery
Free daily delivery is available for larger contractor accounts.
- Order by 9:00 AM for morning delivery
- Order by 2:00 PM for afternoon delivery
- Available in qualifying local delivery areas
Free Weekly Delivery
Free weekly delivery is available for smaller accounts in select service areas.
- Elmira area delivery: Tuesday
- Flesherton area delivery: Thursday
- Order by 11:00 AM on the route day
Pickup Options
Pickup is available from our Ontario locations for customers who prefer to collect their order directly.
- Elmira pickup available
- Flesherton pickup available
- Call ahead for large or special-order items
Local Delivery Areas
See our local delivery coverage below. Delivery charges may apply outside regular route areas or for oversized items.
Delivery Questions
Do you offer free delivery?
Yes, free delivery is available for qualifying contractor accounts and selected local delivery routes.
Can I pick up my order?
Yes, pickup is available from our Elmira and Flesherton locations.
Do delivery charges apply?
Delivery charges may apply outside regular local routes, for smaller orders, or for oversized and heavy items.
Can you deliver to jobsites?
Yes, jobsite delivery may be available depending on the order size, location, and delivery schedule.
Need Electrical Supplies Delivered?
Contact Aptico Supply to confirm your delivery options, pickup availability, or contractor account eligibility.
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