M22x1.5-6g is the metric designations for the threads
No other part numbers with same form, fit, and function found.
An item specifically designed to fit into the opening(s) of various items to provide mechanical protection and/or prevent the entrance of foreign matter during painting, shipping storage, or the like. It is not designed to retain fluids under pressure during equipment operation. Excludes plug (as modified) and stopper, bottle. For items designed to fit into or over the opening(s) of various items, see cap-plug, protective, dust and moisture seal.
Classification: Gaskets,washers & other seals
NSN 5935-00-137-1126
NSN 5990-00-807-3623
NSN 5930-00-292-1089
NSN 6240-00-244-0483
NSN 5996-01-438-0323
NSN 5975-00-525-2331
NSN 6135-00-196-5267
NSN 5960-01-599-9821
NSN 5999-01-438-8997
NSN 6145-00-848-7581
NSN 5996-01-143-0130
NSN 5935-00-799-3693