seal#442251 [bos] is same as #171255
asked by: DAN G
The National Part # 442251 is a single lip seal. The part # RG06-050, 10-19, seals are double lip seals of the same dimensions and will work as replacements for the # 442251 single lip seals. The double lip seals are usually used for applications where the trailer is backed into water and helps keep water out of the trailer hub. For the single lip style seal two of part # 58846 is what you will need.