Mushroom shaped; 40 mm dia; mounted on a 6 mm shaft; 23, 500 rpms
No other part numbers with same form, fit, and function found.
NSN 2925-01-565-6410
NSN 5960-00-416-6016
NSN 6220-01-276-5399
NSN 5920-00-281-2488
NSN 6220-01-417-3412
NSN 5996-01-466-2825
NSN 6685-00-982-2843
NSN 5990-01-344-6176
NSN 5835-01-616-6131
NSN 5895-01-497-2142
NSN 6645-00-337-8276
NSN 5990-01-621-6969