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Small black rubber caps 17mm long 4.5mm inner diameter 100 pieces

Unique-Bargains

Unique-Bargains Insulated End Cap 4.5mm Black 100pcs

SKU CH-4WFN-WXMJR

Pack of 100 black insulated end caps with 4.5mm inner diameter for sealing hoses and protecting threads

  • Protects 4.5mm threads from damage and debris
  • Silicone construction resists heat and chemicals in automotive use
  • Compact 17mm length fits tight engine-bay spaces
  • Light 37g pack of 100 caps keeps inventory stocked
  • Black finish gives a clean professional appearance

4.5mm Insulated End Cap

These black silicone caps fit a 4.5mm inner diameter and measure 17 x 6mm overall. The pack contains 100 pieces weighing 37g in total. They suit automotive, marine and general plumbing tasks where hoses or threaded fittings need temporary or permanent sealing.

Replaces tape and improvised plugs

Unlike makeshift wraps, these caps grip the hose or thread directly and resist oil, fuel and vacuum. The jump is worth it when a clean, reusable seal is required on stainless braided hose, alloy hard pipe or silicone vacuum lines without leaving adhesive residue.

Fits braided hose, hard pipe and vacuum lines

Push the cap over the open end of a 4.5mm bore hose or thread; the flexible silicone stretches to seat securely. No clamps or tools are needed, freeing up time during assembly or maintenance while keeping debris out of fluid systems.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 90% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

What is the inner diameter of the cap so I know which hose or thread it will fit?

The inner diameter is 4.5 mm, matching hoses or threaded fittings of that size.

How do I install these caps and what is the common mistake?

Push the cap straight onto the hose or thread until it seats fully; the common mistake is twisting it on like a nut, which can tear the silicone.

When should I replace a cap and what should I look for?

Replace a cap if the silicone shows cracks, hardening or loss of elasticity, which can happen after prolonged heat or chemical exposure.

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