|High-strength machine screws fabricated from alloy steel per specification QQ-S-689. Tensile strength 125,000 PSI. Cadmium plated per QQ-P-416A, Type II, Class 3. Cross-recessed head.|
Fantastic..! Gives all the streamlinning advantages of a countersunk screw, without the need to compromise the structural integrity of the parent material.
Great quality Hardware!
Perfect for cessna 150 fuel tank cover, used zinc anti-seize.
I intend to use these screws on a hobby project in my Life Steam Railroading hobby. They will be used in four screw rail joints to join the ends of one inch high Steel rail sections.
Much more durable than the old ones.
These are excellent. Much more durable than the others Ive used. Just make sure the shank isnt too long for your project.
Works as described
The part number on Aircraft Spruce matched up perfectly with my Cessna Parts Manual. The screw attaches the window bracket to the window. It was a perfect fit and I was very pleased with the cost and the fast shipping!! Great Job guys! Thank you.
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The R stands for Recessed (Phillips) Head Steel Screw.
Steel Spec: High Tensile Strength of 125,000 PSI
Alloy Spec: High Tensile Strength of 62,000 PSI
No, these are made of cadmium plated steel.
The AN525-832R4 are cad plated, which would resist rust until it eventually wears off.