External Seal Hatch Cover Medium

Allen inspection hatch covers are available in black, grey or white. Allen Hatch Covers are made from a lightweight polypropylene.

O ring required: A.538

Allen has three different hatch cover designs:

A.137 and A.237 are a non O ring design and have exposed fixings.

A.337, A.537 and A.637 all require a rubber O™ Ring to keep them watertight.

A1737, A1837 and A1937 feature a fully threaded cover with watertight seal.