This genuine Meritor AxleTech S28141 axle capscrew is supplied as a 10 pack. The fastener is identified as 50-13UNCX175/1 and is used with the R155 differential carrier model. Call Pro Gear and Transmission if you need help confirming proper fit for your application.This product has been superseded and is no longer available. If ordered, you will receiveS28142.This unit is sold in packs of 10.FeaturesSupplied as a 10 packFastener size code 50-13UNCX175/1Differential carrier model R155Tech SpecsDifferential Carrier Model: R155Fastener Size Code: 50-13UNCX175/1Pack Quantity: 10