Self-Drilling Screw, #8 x 1 in, Zinc Plated Steel Hex Head Hex Drive, 500 PK Ideal for any project involving light gauge sheet metal, awnings, door and window frames, gutters, sheds..
Shoulder Screw, 24 (Coarse) Thr Sz, 3/8 in Thr Lg, 1-1/4 in Shoulder Lg, Steel, 3 PK Shoulder bolt specifications call out the shoulder diameter, shoulder length, and threaded diameter; the threaded length is fixed, based on the threaded diameter, and usually quite short.