thrust ball bearing 51256 1.high quality of bearing and packaging 2.competitive price 3.ISO9001:2000 thrust ball bearing 51256Details: Shield / closure: Open ball bearing, Z, ZZ, RS, 2RS, 2RZ Tolerance code: ABEC-1, ABEC-3, ABEC-5, ABEC-7 Vibration level: V4, V3, V2, V1 Radial play: C0, C2, C3, C4 Material: AISI52100, AISI440C, AISI304, AISI316 Retainer: PTFE, nylon, PEEK or (stainless)steel ...