Cage 9r636 is the oem
A structural shape fabricated from a ferrous or nonferrous material and has a flange extending usually at right angles in the same direction from each edge of a web and/or resembling the letter u in cross-sectional form.
NSN 5930-01-634-0659
NSN 5905-01-347-3175
NSN 6130-01-529-6722
NSN 5998-00-970-5731
NSN 7035-01-300-8409
NSN 7035-01-534-7930
NSN 2925-00-149-0760
NSN 5965-00-079-0928
NSN 7035-01-537-0033
NSN 5935-01-334-9771
NSN 5985-01-025-1951
NSN 6105-01-073-2014