TECHNICAL INFORMATION

Finish Codes

Finish Code Description of Standard Finish
F0 Self Colour
F1 Zinc plate and yellow passivate
F2 Zinc plate and clear passivate
F3 Zinc plate and yellow trivalent passivation to CR3
F4 Zinc plate and clear trivalent passivation to CR3
F5 Phosphate, de-embrittle and oil
F6 Galvanise
F7  Zinc plate and black passivate 
F8 Zinc Nickel plate with black passivate
F11 Zinc plate, de-embrittle and yellow passivate
F12 Zinc plate, de-embrittle and clear passivate
F13 Zinc plate, de-embrittle and yellow trivalent passivation to CR3
F14 Zinc plate, de-embrittle and clear trivalent passivation to CR3
F18 Zinc Nickel plate, de-embrittle and black passivate 

ISO Tolerances for Holes & Shafts

Metric Tolerances

Nominal Sizes ( mm ) H11 H10 H9 H8 H7
1 to 3 0.06 0.04 0.025 0.014 0.01
3 to 6 0.075 0.048 0.03 0.018 0.012
6 to 10 0.09 0.058 0.036 0.022 0.015
10 to 18 0.11 0.07 0.043 0.027 0.018
18 to 30 0.13 0.084 0.052 0.033 0.021
30 to 50 0.16 0.1 0.062 0.039 0.025
50 to 80 0.19 0.12 0.074 0.046 0.03
80 to 120 0.22 0.14 0.087 0.054 0.035
120 to 180 0.25 0.16 0.1 0.063 0.04

Inch Tolerances

Nominal Sizes ( inches ) H11 H10 H9 H8 H7
3/64 to 1/8 0.0024 0.00157 0.00098 0.00055 0.00039
1/8 to 15/64 0.00295 0.00189 0.00118 0.00071 0.00047
15/64 to 25/64 0.00354 0.00228 0.00142 0.00087 0.00059
25/64 to 45/64 0.00433 0.00275 0.00169 0.00106 0.00071
45/64 to 1 3/16 0.00511 0.00331 0.00205 0.0013 0.00082
1 3/16 to 2 0.00629 0.00393 0.00244 0.00153 0.00098
2 to 3 1/8 0.00748 0.00474 0.00291 0.00181 0.00118
3 1/8 to 4 ¾ 0.00866 0.00551 0.00342 0.00213 0.00137
4 ¾ to 7 3/32 0.00984 0.00629 0.00393 0.00248 0.00157

Thread Information

Metric Male Rolled Threads

Thread Size ISO Pitch Coarse Rod Dia
M4 0.7 3.43 / 3.48
M5 0.8 4.34 / 4.39
M6 1.0 5.23 / 5.28
M8 1.25 7.06 / 7.11
M10 1.5 8.86 / 8.91
M12 1.75 10.72 / 10.77

Inch Male Rolled Threads

Thread Size UNF Pitch Rod Dia
10-32 32 .165 / .167
1/4 28 .222 / .224
5/16 24 .278 / .280
3/8 24 .341 / .343
7/16 20 .396 / .398
1/2 20 .460 / .462

Metric Female Cut Threads

Thread Size ISO Pitch Coarse Tapping Drill (mm)
M4 0.7 3.3
M5 0.8 4.2
M6 1.0 5.0
M8 1.25 6.8
M10 1.5 8.5
M12 1.75 10.2
M14 2.0 12.0
M16 2.0 14.0
M18 2.5 15.5
M20 2.5 17.5

Inch Female Cut Threads

Thread Size UNF Pitch Tapping Drill (mm)
10-32 32 4.1
1/4 28 5.5
5/16 24 6.9
3/8 24 8.5
7/16 20 9.9
1/2 20 11.5

Spanner Flat Details on Rods

Coining Detail for Spanner Flats on Rods

Material Size Across Flats Width
3/16 and 5mm 2.85 / 3.00 4.00
1/4 and 6mm 3.85 / 4.00 4.00
5/16 and 8mm 4.85 / 5.00 6.00
3/8 and 10mm 6.85 / 7.00 8.00
1/2 and 12mm 8.85 / 9.00 10.00

Coining Flat Detail