Re: 1975 Starcraft Mariner 18'
Why are you going with aluminum screws? That knee brace is critical to the strength of the transom so I would suggest stainless.
Mike I checked out the specs for what I ordered on fastenals website
Dimensions: ASME B18.2.1, Fully threaded.
? Material: 2024T4 Aluminum.
? Mechanical Properties: Hardness: 70-85 HRB
Minimum tensile strength 55,000 PSI. Minimum yield 36,000 PSI.
? Thread requirements: ASME B1.1 UNC & UNF Class 2A.
Thread acceptance per 6.5.1.4 of ASTM F788
? Head Marking: Manufacturer?s ID.
? RoHS: Material shall be in compliance with European Union
Directive 2002/95/EC
? Material Test Reports: The MTR must have documented lot traceability, including full
chemical and mechanical figures, to the specification(s) above.
It seems like they should be strong enough to me probably as strong or stronger as original knee brace metal 36 years ago what do you guys think? Is stainless better for this application ? Thanks for the replies