Used on contractor logistic support model m871,30-foot trailer,laundry advanced system (ladds),nsn 2330-00-122-6779 contract daak60-97-c-922 tm 9-3510-122-24p. 6.250" inside diameter contracting concentric ring style 8 drilled 0.625 inch holes
Used on must accommodate a 24 x 1.5 mm machine screw and is sea water and heat resistant from -20 to +80 degrees celsius. 22.0mm outside diameter o-ring circular