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Four aluminum and rubber AC blockoff fittings with couplers and sealing sleeves

AirSept

AirSept 76503 Line Terminator AC Blockoff 5/16 OD 4 Pack

SKU CH-39B8-9ZM1Q

A four-piece AC line terminator kit with aluminum and rubber blockoffs, couplers, nuts, sleeves, and anti-vibration rings for 5/16-inch OD tubing

  • Product typeAccessories & Compressors
  • Aluminium construction resists corrosion for lasting A/C sealing
  • Rubber components absorb vibration to protect line connections
  • Four-piece kit supplies terminators for multiple service points
  • Coupler body and nuts included for direct installation
  • Anti-vibration tension rings maintain secure fit under pressure

Aluminium AC line terminator kit

This four-piece kit provides aluminium block-off couplers with rubber sealing sleeves and anti-vibration tension rings. Each unit measures 4-1/4 inches high, 2 inches wide and has a 5/16 inch outer diameter. The components are designed for use with automotive air-conditioning, heater and transmission lines.

Seals hold pressure over long runs

The aluminium bodies and rubber sleeves maintain a tight seal under continuous system pressure rather than only during brief test cycles. Anti-vibration tension rings absorb ongoing mechanical shake from engine and road loads, preventing the joint from loosening over time. The kit is intended for permanent line termination in sustained service.

Lightweight alloy resists corrosion

Aluminium construction keeps weight low while resisting rust in under-hood and under-chassis environments. Rubber sleeves accommodate minor tube imperfections and thermal cycling without cracking. Supplied nuts and couplers thread directly onto 5/16 inch OD lines, allowing quick installation without special tooling or permanent modification.

How it compares

Measured against everything we stock in Solar-Powered Chargers & Devices, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 73% of the 874 comparable items (median $25.99).

Specifications

Product
Brand nameAIRSEPT
Product typeAccessories & Compressors

Questions about this item

Does the 5/16 In.OD blockoff generate heat or noise when the A/C system runs continuously?

The aluminum and rubber blockoff is a passive sealing component with no moving parts, so it produces no noise or heat during all-day A/C operation.

Which A/C fittings or couplers must I already have to install these four blockoff pieces?

Each blockoff includes its own coupler body, nuts, sealing sleeves and anti-vibration tension rings, so no extra fittings are required for the 5/16 In.OD lines.

Will the 76503 blockoff seal properly on older aluminum A/C lines that have surface corrosion?

The included rubber sealing sleeves and anti-vibration tension rings are designed to conform to standard 5/16 In.OD aluminum lines, compensating for minor surface imperfections on older hardware.

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