... ,steel 3.ISO9001:2000 4.OEM OK 1.SKF NA needle bearing/needle bearing 2.Classification:a.Radial needle ... roller and cage assemblies,b.NA,NKI series needle bearingc.RNA,NK series needle bearing ... HK series/needle bearingBrand nameNSK TIMKEN SKF Koyo IKO NTNSeries NA 4917SriesMaterialBearing steel GCr15 and Stainless steelKeeperstainless steel, PTFE, nylonPrecisionP0 ...