Suggested source adb "hl48-12"
A tubular shaped unthreaded item with or without a flange at one end designed to be inserted into a hole to reduce the inside diameter of the hole and to protect the surrounding body structure from damage resulting from stress, strain, and/or vibration. The overall length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body. Includes items which are divided into two or more segments which includes 180 degrees (3.141 radians) or less of the bearing periphery. For items made of rubber, see bushing, nonmetallic. See also bearing, sleeve; bushing, tapered; spacer, sleeve; insulator, bushing; and bushing, electrical conductor. Excludes bushing, drill, jig.
NSN 5950-00-406-3093
NSN 5920-01-138-4984
NSN 6220-01-393-1808
NSN 6620-01-617-3915
NSN 6610-00-207-4207
NSN 6145-00-145-3484
NSN 6150-00-072-9384
NSN 5996-01-437-8824
NSN 6645-01-603-9331
NSN 5945-01-620-7703
NSN 5996-00-978-4547
NSN 5895-01-608-5066