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MARYLAND METRICS
THREAD DATA CHARTS

Bicycle Screw Thread DIN 79012


For cycles and motor scooters
Thread Size
mm
Major Diameter
mm
Tapping Drill
Size
mm
TPI Pitch
mm
Fg 2 2,096 1,613 56 0,454
Fg 2,3 2,299 1,816 56 0,454
Fg 2,6 2,604 2,121 56 0,454
Fg 6,35 6,350 5,310 26 0,977
Fg 7,9 7,938 6,898 26 0,977
Fg 9,5 9,525 8,485 26 0,977
Fg 14,3 14,288 12,934 20 1,270
Fg 25,4 25,400 24,272 24 1,058
Fg 32,8 32,766 31,638 24 1,058
Fg 34,8 34,798 33,670 24 1,058
Cycle Thread

C.E.I.-Thread

 

Cycle Engineer Institution Thread, used in the British bicycle industry.
Major Diameter
Inch
Major Diameter
mm
Tapping Drill
Size
mm
TPI Pitch
mm
0,056 1,422 0,965 62 0,409
0,064 1,626 1,190 62 0,409
0,072 1,829 1,393 62 0,409
0,080 2,032 1,596 62 0,409
0,092 2,337 1,854 56 0,453
0,104 2,642 2,642 44 0,577
0,125 3,175 2,499 40 0,635
0,154 3,912 3,236 40 0,635
0,175 4,445 3,600 32 0,794
0,187 4,762 3,917 32 0,794
0,250 6,350 5,309 26 0,977
0,266 6,756 5,715 26 0,977
0,281 7,137 6,096 26 0,977
0,312 7,937 6,896 26 0,977
0,375 9,525 8,484 26 0,977
0,562 14,287 12,287 20 1,270
1,000 25,400 24,359 26 0,977
1,290 32,766 31,639 24 1,058
1,370 34,797 33,670 24 1,058
1,437 36,512 35,385 24 1,058
1,500 38,100 36,973 24 1,058
CEI Thread
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