Details
4B4-R16 North American Aviation standard press-fit bushing for 3/8 in. bolt.
Part Number: 4B4-R16
Part Type: Bushing
Bolt Size: 3/8 in.
A 4B series press-fit bushing is pressed into a reamed hole in a fitting, bellcrank, or bracket to give the bolt a hard, replaceable bearing surface. When it wears, the bushing is replaced instead of the parent part. The basic number sets the bolt size on this NAA standard.
Photos are for reference only.
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