What is the Grade Rating on the Replacement Hex Head Bolt for Thule Goalpost
Updated 03/11/2015 | Published 03/10/2015
Question:
My previous bolt started showing tear, so I was wondering what grade of steel is this part? What grade is the original Thule part meant to be?
asked by: Rodolphe D
Expert Reply:
I went to our warehouse to pull this hex head bolt # 908-1240-54. This bolt will have a property class of 8.8 and is classified as a high strength steel bolt.
The point at which a bolt fails is the tensile strength, and because it is elongated (much longer than the actual width), the bolt probably failed because it was used past the yield point. As a result, causing permanent deformation and wear. The most common property classes most often used are 5.8, 8.8 and 10.9. If there isn't a number/marking on top, that will indicate a lower grade bolt with low strength. See the picture I included of the top of this bolt.
Product Page this Question was Asked From
Replacement 12 x 40 mm Hitch Bolt for Thule Hitch Bike Racks and Goalpost Hitch Mounted Load Bar
- Accessories and Parts
- Hitch Bike Racks
- Hardware
- Bolts
- Hitch Bolt
- Parkway
- Vertex
- Thule
more information >
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