Specifications of International Thread Standards

Sewing Machine Thread (Nähnorm 100)

Nominal
Diameter
Inch
Major
Diameter
Bolt mm
Minor
Diameter
Bolt mm
Major
Diameter
Nut mm
Minor
Diameter
Nut mm
TPI Pitch
mm
5/64" 1,984 1,468 2,013 1,554 64 0,397
3/32" 2,381 2,051 2,399 2,106 100 0,254
3/32" 2,381 1,791 2,414 1,889 56 0,453
1/8" 3,175 2,425 3,217 2,550 44 0,577
9/64" 3,572 2,748 3,618 2,885 40 0,635
11/64" 4,366 3,542 3,412 3,679 40 0,635
3/16" 4,763 4,731 4,820 4,903 32 0,796
3/16" 4,763 3,591 4,828 3,786 28 0,907
15/64" 5,953 4,781 6,018 4,976 28 0,907
1/4" 6,350 5,526 6,396 5,663 40 0,635
9/32" 7,144 5,494 7,236 5,769 20 1,270
9/32" 7,144 5,972 7,209 6,167 28 0,907
5/16" 7,938 6,104 8,040 6,410 18 1,411
3/8" 9,525 8,353 9,590 8,548 28 0,907
7/16" 11,113 9,941 11,178 10,136 28 0,907
9/16" 14,288 12,638 14,380 12,913 20 1,270
Sewing Machine Thread