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Four black rubber expansion plugs with bronze metal nuts and washers, 36 by 43 mm

Unique-Bargains

Unique-Bargains Rubber Expansion Plug 4pcs 38-41mm

SKU CH-V5D2-SXP82

Set of four rubber expansion plugs that fit 38 mm to 41 mm holes and resist heat, antifreeze, oil and rust inhibitors

  • Seals 38–41 mm holes with expanding rubber
  • Resists heat, coolant, oil and rust inhibitors
  • Installs using only a standard wrench
  • Durable rubber-and-metal construction for reliable sealing
  • Four plugs included for multiple repair jobs

Automotive Rubber Expansion Plugs

This pack contains four rubber expansion plugs designed to seal engine block or chassis openings in automotive and RV applications. They fit hole diameters from 38 mm to 41 mm and are supplied new for immediate installation.

Simple Wrench Installation

Each plug tightens by turning a single nut which expands the rubber body against the hole wall. The rubber and metal construction resists heat, antifreeze, oil and rust inhibitors, so the seal remains effective under normal engine operating conditions.

Limited to 38–41 mm Holes

The plugs only cover the stated 38 mm to 41 mm range; openings outside this size cannot be sealed with this kit. Builders needing larger or smaller diameters, or a permanent metal core plug, will need a different solution.

Highlights

  • Seals 38–41 mm holes with expanding rubber
  • Resists heat, coolant, oil and rust inhibitors
  • Installs using only a standard wrench
  • Durable rubber-and-metal construction for reliable sealing
  • Four plugs included for multiple repair jobs

Specifications

BrandUnique Bargains

Questions about this item

How often should the rubber expansion plugs be inspected or replaced?

The rubber material resists heat, anti-freeze, oil and rust inhibitors, but periodic visual checks for cracking or hardening are recommended; replace any plug that shows deterioration.

What is the maximum hole diameter these plugs can seal reliably?

The plugs fit hole sizes from 38 mm to 41 mm (1-1/2" to 1-5/8"); holes larger than 41 mm exceed the expansion range and will not seal.

How hot do the plugs get during continuous engine operation?

The rubber and metal construction is engineered to withstand normal engine temperatures; the material resists heat and anti-freeze without melting or degrading.

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