a mW is the wrenching height; see note to Table
b θ=90° to 120°
c β=15° to 30°
d δ=15° to 25°
e c is measured at dw,min
f Contour of the edge is at the discretion of the manufacturer.
| Thread D |
M5 | M6 | M8 | M10 | M12 | (M14)3 | M16 | M20 | |
|---|---|---|---|---|---|---|---|---|---|
| Pb | 0.8 | 1 | 1,25 | 1,5 | 1,75 | 2 | 2 | 2,5 | |
| c | min | 1,0 | 1,1 | 1,2 | 1,5 | 1,8 | 2,1 | 2,4 | 3,0 |
| da | max | 5,75 | 6,75 | 8,75 | 10,80 | 13,00 | 15,10 | 17,30 | 21,60 |
| min | 5,00 | 6,00 | 8,00 | 10,00 | 12,00 | 14,00 | 16,00 | 20,00 | |
| dc | max | 11,8 | 14,2 | 17,9 | 21,8 | 26,00 | 29,9 | 34,5 | 42,8 |
| dw | min | 9,8 | 12,2 | 15,8 | 19,6 | 23,8 | 27,6 | 31,9 | 39,9 |
| e | min | 8,79 | 11,05 | 14,38 | 16,64 | 20,03 | 23,36 | 26,75 | 32,95 |
| m | max | 5,00 | 6,00 | 8,00 | 10,00 | 12,00 | 14,00 | 16,00 | 20,00 |
| min | 4,70 | 5,70 | 7,64 | 9,64 | 11,57 | 13,30 | 15,30 | 18,70 | |
| mw | min | 2,5 | 3,1 | 4,6 | 5,6 | 6,8 | 7,7 | 8,9 | 10,7 |
| s | max | 8,00 | 10,00 | 13,00 | 15,00 | 18,00 | 21,00 | 24,00 | 30,00 |
| min | 7,78 | 9,78 | 12,73 | 14,73 | 17,73 | 20,67 | 23,67 | 29,16 | |
| yc | max | 0,3 | 0,4 | 0,5 | 0,6 | 0,7 | 0,9 | 1,0 | 1,2 |
Note: If the product passes the gauging given in Annex A, the requirements for dimensions e,c and mw are satisfied.
a The Size in parenthease should be avoided if possible
b p is the pinch of the thread
c Radius, r, applies both at the corner and flats of the hexagon
All data for information purpose only. For more details on product standards or dimensions, please feel free to contact us at centuryboltcentre@gmail.com