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Unified Inch (UNC / UNF / UN)

UNM Unified Miniature Thread

Miniature threads from 0.30 to 1.40 mm for instruments and watches.

Standard
ANSI/ASME B1.10
Flank angle
60°
Sizes listed
14
Range
0.30 UNM – 1.40 UNM
Profile shape (schematic, not to scale)

Thread Size mmMajor Diameter mmPitch mmTPI
0.30 UNM0.300.080317.50
0.35 UNM0.350.090282.22
0.40 UNM0.400.100254.00
0.45 UNM0.450.100254.00
0.50 UNM0.500,125203.20
0.55 UNM0.550.125203.20
0.60 UNM0.600.150169.33
0.70 UNM0.700.175145.14
0.80 UNM0.800.200127.00
0.90 UNM0.900.225112.89
1.00 UNM1.000.250101.60
1.10 UNM1.100.250101.60
1.20 UNM1.200.250101.60
1.40 UNM1.400.30084.67
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Related Standards

UNC Unified Coarse Thread ANSI/ASME B1.1 33 rows · #1 - 64 UNC – 4" - 4 UNC UNF Unified Fine Thread ANSI/ASME B1.1 24 rows · #0 - 80 UNF – 1 1/2" - 12 UNF UNEF Unified Extra-Fine Thread ANSI/ASME B1.1 24 rows · N 12 - 32 UNEF – 1 11/16" - 18 UNEF 12-UN Constant Pitch Series ANSI/ASME B1.1 49 rows · 5/8" - 12-UN – 6" - 12-UN 16-UN Constant Pitch Series ANSI/ASME B1.1 54 rows · 7/16" - 16-UN – 6" - 16-UN 20-UN Constant Pitch Series ANSI/ASME B1.1 29 rows · 5/16" - 20-UN – 3" - 20-UN

Reference values only. Verify against the current edition of the governing standard before use in production drawings or manufacturing. Provided by Micro Components as a free engineering resource.