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Silver aluminium compression block-off fitting with clamp and screws

SUR&R Auto Parts

SUR&R Auto Parts AC8MCB Compression Block Off 8mm

SKU CH-G8E7-4QCQB

Aluminium compression block-off fitting seals 5/16 in automotive A/C lines and includes clamp plus self-tapping screws

  • Automotive A/C line sealing with 8mm compression fit
  • Aluminium construction resists corrosion in refrigerant systems
  • Includes clamp and self-tapping screws for secure installation
  • Single-piece block-off simplifies service or repair jobs
  • Compatible with 52HG65 fittings for direct replacement

Automotive A/C compression block-off

The SUR&R AC8MCB is an aluminium fitting designed to seal a 5/16 inch outside-diameter line in automotive air-conditioning systems. It includes a clamp and self-tapping screws for a single-piece installation. Professional technicians and DIY owners use it when a connection point must be permanently closed. The part is supplied new and ready for immediate use.

Compression fitting sealing limits

A compression block-off relies on the clamp and screws to create a leak-tight seal on rigid or semi-rigid tubing of the stated diameter. It cannot compensate for damaged, corroded or out-of-round tube ends, and it is not intended for repeated assembly and disassembly. The fitting is restricted to the specified 5/16 inch outside diameter and the listed application.

5/16 inch outside diameter compatibility

The single specification that decides fitment is the 5/16 inch outside diameter of the A/C line or adapter being sealed. If the tubing differs from this size, the block-off will not seal correctly and a different fitting is required. No other dimensions or thread pitches are provided for cross-reference.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $22.99
Pricier than about 58% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameSUR&R

Questions about this item

Which version of this compression block off should I choose for my A/C line?

This is a single 5/16 in aluminum block off that includes a clamp and self-tapping screws, so there is only one version to select.

What does the 5/16 in outside diameter mean when I install it on the vehicle?

It matches a 5/16 in A/C line or adapter, letting the compression fitting seal the opening without additional sizing steps.

What compression standard does this fitting follow and what pressure does that limit?

It is a standard automotive A/C compression block off designed to seal 5/16 in lines using the included clamp and self-tapping screws.

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