[1  & 4-20 x 2   10 Pcs]

[1  & 4-20 x 1   20 Pcs]

[1  & 4-20 x 3  & 4   25 Pcs]

Allen Hex Drive Size: 5/32"(0.156")
Thread Size: 1/4-20 UNC; Thread Type: 20 TPI.Thread Coverage: Fully Threaded
Threaded Shaft Length: 1". Head Diameter: 0.43"; Head Height: 0.132"
The button head socket screws are made of 304 stainless steel 18-8 (304) which provides better strength and corrosion resistance than regular steel and any zinc plated fasteners
Quantity: 20 PCS Button Head Socket Screws