Ext circ groove, 0.250 in. Radius
A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
Classification: Nuts of iron or steel
NSN 5985-01-599-4215
NSN 6620-01-336-2663
NSN 6685-01-234-3621
NSN 5999-01-543-3834
NSN 5945-00-492-5876
NSN 6610-01-498-4063
NSN 5855-01-472-2554
NSN 5910-01-272-1050
NSN 5855-01-417-3250
NSN 6240-01-144-5729
NSN 5920-01-505-3143
NSN 6110-00-686-1530