phillips bugle head phosphate or zinc, flat head 3. 5 X 16- 4. 8 X 180
Drive Recess: PHIL, SQUARE, PHIL/SQUARE
Head Type: BUGLE
Diameter: #6 ~ #10, M3.5 ~ M4.8
Length: 3/4" ~ 6", 25mm ~ 150mm
Thread Type:TWINFAST, COARSE, FINE
Plating: GREY PHOSPHATED, BLACK PHOSPHATED, BLACK OXIDE, ZINC PLATED, YELLOW ZINC