154mm hatch cover with integral seal

Allen Hatch Covers are made from a lightweight polypropylene. Available in Grey, Black and White.

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.