1/4-20 x 2 6-Lobe Pan Taptite Alternative Thread Rolling Screw Fully Thrd Zinc & Wax ASF and the 3/8" length means

and the 3/8" length means that it is 3/8" long from the underside of the head to the tip

This 1/4-20 x 2 1/4 Slotted Flat Machine Screw is made of 18-8 stainless steel

It also has a jam nut design

This 1/4-20 x 2 Combination (Phil/Slot) Pan Head Machine Screw is a versatile and durable fastener designed for a wide range of applications

The 8-16 x 1/2 Phillips Full Contour Truss Plastite Alternative 48-2 Fully Thrd Zinc &Wax is a versatile and durable screw designed for a wide range of applications

1/4-20 x 2 6-Lobe Pan Taptite Alternative Thread Rolling Screw Fully Thrd Zinc & Wax ASF and the 3/8" length meansThe 1 4 20 x 2 6 Lobe Pan Taptite Alternative Thread Rolling Screw Fully Threaded Zinc & Wax is a high performance screw designed for use in metal applications. It features a 6 lobe drive that provides increased torque and reduces cam out, making it ideal for use with power tools. The thread rolling design creates strong threads in the mating material, eliminating the need for tapping and providing superior holding power. The fully threaded design