Application

  1. You state in some of your product information that NMSS Socket Head Cap Screws are included in your packages.What does NMSS mean?
  2. It doesn't look like you manufacture a Rock Crusher for my axle, what are my options?
  3. I have an aftermarket Aluminum cover for my Sterling axle on my Ford Super Duty, it is not a PCP Aluminum Cover. Will your Spider Rock Guard for Aluminum cover fit my cover?
  4. Does your Rock Crusher Covers hold more fluid for better lubricate and heat dissipation.

Q: You state in some of your product information that NMSS Socket Head Cap Screws are included in your packages.What does NMSS mean?

NMSS, Non-Magnetic Stainless Steel. These are a very fine grade of stainless steel fasteners, with almost no carbon steel therefore they are non-magnetic.

Q: It doesn't look like you manufacture a Rock Crusher for my axle, what are my options?

We manufacture more Spider Rock Guards than Rock Crushers, do we manufacture a Spider Rock Guard for your application? If not you are still in luck, we can manufacture a Rock Crusher cover complete with integrated drain plug, dip stick, internal magnets, powder coated inside and out and all NMSS fasteners for $225.99.

Q: I have an aftermarket Aluminum cover for my Sterling axle on my Ford Super Duty, it is not a PCP Aluminum Cover. Will your Spider Rock Guard for Aluminum cover fit my cover?

It may or it may not. Our Spider Rock Guards for Aluminum covers are only guaranteed to fit our PCP Aluminum covers. The casting thickness and drain plug location varies tremendously from manufacture to manufacture. Although many customers have said our covers are exact matches (size and dimensions) for some of the other aftermarket covers, we cannot guarantee it will fit.

Q: Does your Rock Crusher Covers hold more fluid for better lubricate and heat dissipation.

No, to increase fluid capacity we would have to make our covers larger, which would make them more susceptible to getting hung up on rocks.