Originally Posted by
mikey
...Garey,
The description of "shear" on NAS bolts was confusing to me, as I've also seen bolts that are described and designed to shear as a fail-safe to protect more expensive equipment (like a PTO on a tractor - they use low strength "shear" bolts on the blades in case the mower hits something). In both our brake application and the tractor example, the bolts are in a shear environment. But obviously we don't wish for them to shear off in brakes!
I thought I read somewhere else that NAS bolts have higher shear strength than AN bolts and are thus desirable for applications in shear....