Specification Brand : Midland BulletPoint1 : Type a: the original style a o-ring has no retaining ledge BulletPoint2 : Type b: the type b groove has a retaining ledge BulletPoint3 : Npsm fittings include an inverted 60° cone inside an internally threaded swivel union nut BulletPoint4 : Country of origin: United States BulletPoint5 : Material conforms to astm a-351. Class 150 pressure ratings ConnectorType : Plug ExteriorFinish : Alloy Steel ItemName : Midland 8555-H-22 Steel Hollow Hex Head Metric Parallel Plug, M 22 x 1.5 Metric Thread ItemPackageDimensions_Height : 2 inches ItemPackageDimensions_Length : 2 inches ItemPackageDimensions_Width : 2 inches ItemPackageQuantity : 1 ItemShape : plug ItemTypeKeyword : compression-fitting-plugs Manufacturer : Midland Metal Mfg. Material : Steel ModelNumber : 8555-H-22 NumberOfItems : 1 PartNumber : 8555-H-22 ProductDescription : MIDLAND METAL 3/8-24 OR HEX HD PLUG 6408O3 (6408O3) ProductSiteLaunchDate : 2016-03-24T02:31:45.354Z Size : Medium 22 x 1.5 Metric Thread StreetDate : 2018-05-31T00:00:01Z SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 40141734