Fastener Head Dimensions

Guide sizes only. For accurate current stock sizes, please contact sales team. Samples available for approval upon request.

SCREW TYPE SELF TAPPING SCREW GAUGE
2-HOLE No 4 No 6 No 8 No 10 No 12 No 14
DIMENSIONS 2.9mm 3.5mm 4.2mm 4.8mm 5.5mm 6.3mm
Pan Head A 5.4 6.7 8 9.2 10.5 12.2
B 1.6 2 2.3 2.7 3.2 3.5
Countersunk Head A 5.5 6.7 7.9 9 10.3 12.2
B 2 2.5 2.8 3.6 3.7 4.6
SCREW TYPE METRIC MACHINE SCREWS
2-HOLE M3 M4 M5 M6
DIMENSIONS
Pan Head A 5.8 7.8 9.8 11.8
B 1.8 2.4 2.9 3.5
Countersunk Head A 5.5 7.4 9 10.8
B 1.6 2.4 2.9 3.5
SCREW TYPE SELF TAPPING SCREW GAUGE
Resytork No 4 No 6 No 8 No 10 No 12 No 14
DIMENSIONS 2.9mm 3.5mm 4.2mm 4.8mm 5.5mm 6.3mm
Button Head A   6.7 7.4 9.3 10 11
B   2.5 2.1 2.6 3.1 3.4
Countersunk Head A 4.8 6.6 7.9 9.3 10 13
B 1.8 2.1 2.5 3 4 4.8
SCREW TYPE METRIC MACHINE SCREWS
Resytork M3 M4 M5 M6 M8 M10
DIMENSIONS
Button Head A 5.5 7.4 9.3 10.3 13.7 17.3
B 1.7 2.1 2.6 3.2 4.5 5.5
Countersunk Head A 5.9 7.8 9.8 11.8 14 17.3
B 2 2.3 2.8 3.3 4.7 5.2
SCREW TYPE SELF TAPPING SCREW GAUGE
Pin Hex No 6 No 8 No 10 No 12 No 14
DIMENSIONS 3.5mm 4.2mm 4.8mm 5.5mm 6.3mm
Button Head A 6.7 7.4 9.3 9.9 11
B 2.5 2.1 2.6 2.9 3.4
Countersunk Head A 6.6 7.9 9.3 11.7 12.8
B 2.1 2.5 3 4.8 5.2
SCREW TYPE METRIC MACHINE SCREWS
Pin Hex M3 M4 M5 M6 M8 M10 M12
DIMENSIONS
Button Head A 5.5 7.4 9.3 10.3 13.7 17.4 20.5
B 1.7 2.1 2.6 3.2 4.4 5.5 6.5
Countersunk Head A 5.5 7.8 9.8 11.8 15.7 19.7 23.6
B 1.7 2.3 2.8 3.3 5.2 6.3 7.5

Please note:

The guide only shows sizes without min. and max. tolerances. Sentinel Group reserve the rights to change/alter sizes without notice.

SCREW TYPE IMPERIAL METRIC MACHINE SCREWS
Resytork 6-32 UNC 8-32 UNC 10-24 UNC 10-32 UNC 1/4-20 UNC
DIMENSIONS
Button Head A 6.5 7.5 9 9 11
B 2.2 2.2 2.5 2.5 3.2
Countersunk Head A 6.35 7.5 9 9 12.5
B 2.5 3 3.5 3.5 4.5