These are Grade 5 course thread Zinc plated screws.

They are made of Medium Carbon Steel.

This is the most common length used in 1-1/2 x 1-1/2, 1-1/2 x 3 and 3 x 3 inch

Aluminum extrusion assemblies / constructions.

They have been used once - are in excellent condition.

Actual pictures of bolts.

Price $14.00 for package of 100 (10 packs available)