Per mcmaster carr part number has multiple sources and oem could not be provided
A metallic item, usually square or rectangular in cross section, usually longer in relation to its width and thickness, with or without a head, usually designed to fit into the pre-cut slots of two adjacent cylindrically shaped members, to prevent relative rotational movement between the two. It may have mounting holes or slots.
NSN 6145-00-188-3657
NSN 5920-01-014-8195
NSN 5998-01-125-3109
NSN 5945-00-019-1380
NSN 6130-01-495-9327
NSN 5895-00-869-6233
NSN 5935-01-605-3243
NSN 5990-00-058-4514
NSN 5999-00-518-1007
NSN 6150-01-592-4571
NSN 2925-00-624-9199
NSN 5975-00-874-6950