Description Safety Slide Yoke 1-3/8" X 21 Spline This item is a suitable alternative for the following: 971-1016821, BYQ8247138NS, BYQ8-24-7-138NS, BYQ8-24-7-1387NS, BQ8-24-7-138NS, ABP5720M3776, A-BP5720M3776, 65888021, 658-88021, 572083751, 507083751, 505083751, 435000332R, 101-6821, 1006821