61/2"bolt pattern, idler hub type, made for 6000lb-7000lb axle; fits 42 series spindles
No other part numbers with same form, fit, and function found.
NSN 6685-00-001-4183
NSN 5950-00-762-8831
NSN 5915-00-525-5753
NSN 5985-00-534-8820
NSN 5905-01-086-5576
NSN 5895-00-930-3741
NSN 6320-01-056-1164
NSN 6240-01-586-9718
NSN 5910-00-949-5308
NSN 5925-00-952-0618
NSN 6130-01-274-0194
NSN 5996-01-106-2763