Recorded cage 1hru7 as they state they hold the design control
An item designed to distribute steam and/or air inside a boiler, for the purpose of cleaning tubes and walls.
NSN 6240-01-448-2717
NSN 5910-00-369-9707
NSN 6220-01-538-0627
NSN 6135-00-548-2765
NSN 5975-01-023-8773
NSN 5998-01-059-1046
NSN 5855-01-131-9336
NSN 5999-01-652-2129
NSN 5985-01-320-5099
NSN 6145-01-444-0812
NSN 2925-01-448-2880
NSN 2925-01-468-7073