• for Bicycle Threads
  • for European Parallel Pipe Threads (G)
Unit:mm
Major DiameterPitch DiameterMinor Diameter
SizeBasic SizeBasic SizeBasic Size
BC5/16- 267.947.426.90
BC3/8- 269.539.018.49
BC7/16- 2611.1110.5910.07
BC1/2- 2012.7012.0211.34
BC9/16- 2014.2913.6112.93
BC5/8- 2015.8815.2014.52
BC11/16- 2417.4616.9016.34
BC3/4- 3019.0518.6018.15
BC31/32- 3024.6124.1623.71
BC1 - 2425.4024.8424.28
BC1.29 - 2432.7732.2131.65
BC1.37 - 2434.8034.2433.68
BC17/16- 2436.5135.9535.39
BC1.45 - 2436.8336.2735.71
BC19/16- 2439.6939.1338.57
r uropanaraepereas()Unit:mm
Major DiameterPitch DiameterMinor Diameter
SizeClassBasic SizeBasic SizeUpper Tolerance ( μ m) +Lower Tolerance ( μ m) +Basic Size
G1/8- 28-9.7289.14743218.566
G1/4- 19-13.15712.301502511.445
G3/8- 19-16.66215.806502514.950
G1/2- 14-20.95519.793572818.631
G5/8- 14-22.91121.749572820.587
G3/4- 14-26.44125.279572824.117
G7/8- 14-30.20129.039572827.877
G1 - 11-33.24931.770723630.291
G11/4 - 11-41.91040.431723638.952
G11/2 - 11-47.80346.324723644.845
or Sizere Classs Major Diameter Basic SizePitc Basic Sizeh Diamet Upper Tolerance ( μ m) +er Lower Tolerance ( μ m) +Unit:mm Minor Diameter Basic Sizeor uro Sizeean Classee Major Diameter Basic Sizeonu Pit Basic Sizerea ch Diamet Upper Tolerance ( μ m) +s (g) er Lower Tolerance ( μ m) +Unit:mm Minor Diameter Basic Size
3/32 BSW 48-2.3812.04232151.704Pg 7 - 20-12.5011.89603011.28
1/8 BSW 40-3.1752.76835152.362Pg 9 - 18-15.2014.53603013.86
5/32 BSW 32-3.9693.46040182.952Pg 11 - 18-18.6017.93603017.26
3/16 BSW 24-4.7624.08544213.407Pg 13.5 - 18-20.4019.73603019.06
7/32 BSW 24-5.5564.87944214.201Pg 16 - 18-22.5021.83603021.16
1/4 BSW 20-6.3505.53746234.724Pg 21 - 16-28.3027.541005026.78
5/16 BSW 18-7.9387.03449236.130Pg 29 - 16-37.0036.241005035.48
3/8 BSW 16-9.5258.50951257.493
7/16 BSW 14-11.1129.95056288.788
1/2 BSW 12-12.70011.34561309.990
9/16 BSW 12-14.28812.933613011.578■for Microscope Objective ThreadsUnit:mm
5/8 BSW 11-15.87514.396633012.917Major DiameterPitch DiameterMinor Diameter
3/4 BSW 10-19.05017.424693315.798SizeClassBasicBasicUpper ToleranceLower ToleranceBasic
7/8 BSW 9-22.22520.418693318.611SizeSize( μ m) +( μ m) +Size
1 BSW 8-25.40023.367743621.33420.32W36-20.32019.868382319.416

Technical Inf