Ring & Plug Thread Gages  
 
Call 616 954 6581 for Thread Gages
About Ring & Plug Thread GagesUsed - Surplus Ring & Plug Thread GagesRing & Plug Thread Gage Technical InformationRing & Plug Thread Gage CatalogsContact Ring & Plug Thread GagesBookmark

 

 
 
 
 
 
Technical Information

INDEX of THREAD DATA CHARTS

BSW BRITISH STANDARD COARSE PITCH THREAD CHART

British Thread Coarse Pitch BSW

Whitworth Coarse Thread BS 84
BSW (British Standard Whitworth)
British Standard Whitworth Coarse Thread Series (parallel, cylindrical)
In GB most common Thread. Corresponds to the Metric Thread in its type of use.

  THREAD DATA CHART:  
  British Thread (British Standard Whitworth) -- Coarse Pitch  
  Nominal
Size
Ww
Thread
Form
Type
Major
Diameter
mm
d=D
Pitch
mm
p
Threads
per
inch
tpi
Pitch
Diameter
mm
d2=D2
Minor
Diameter
Male Thd.
d3
Thread
Height
H1
Tap
Drill
Diameter
mm
 
1/16" BSW 1.587 0.423 60 1.315 1.050 0.270 1.15
3/32" BSW 2.381 0.529 48 2.041 1.703 0.338 1.90
1/8" BSW 3.175 0.635 40 2.768 2.362 0.406 2.50
5/32" BSW 3.969 0.793 32 3.459 2.952 0.507 3.20
3/16" BSW 4.762 1.058 24 4.084 3.407 0.677 3.70
7/32" BSW 5.556 1.058 24 4.878 4.201 0.677 4.50
1/4" BSW 6.350 1.270 20 5.537 4.724 0.813 5.10
5/16" BSW 7.938 1.411 18 7.034 6.131 0.904 6.50
3/8" BSW 9.525 1.588 16 8.509 7.492 1.017 7.90
7/16" BSW 11.113 1.814 14 9.951 8.789 1.162 9.20
1/2" BSW 12.700 2.117 12 11.345 9.990 1.355 10.40
5/8" BSW 15.876 2.309 11 14.397 12.918 1.479 13.40
3/4" BSW 19.051 2.540 10 17.424 15.798 1.627 16.25
7/8" BSW 22.226 2.822 9 20.419 18.611 1.807 19.25
1" BSW 25.400 3.175 8 23.368 21.335 2.033 22.00
1-1/8" BSW 28.576 3.629 7 26.253 23.929 2.324 24.50
1-1/4" BSW 31.751 3.629 7 29.428 27.104 2.324 27.25
1-3/8" BSW 34.926 4.233 6 32.215 29.505 2.711 30.25
1-1/2" BSW 38.100 4.233 6 35.391 32.680 2.711 33.50
1-5/8" BSW 41.277 5.080 5 38.024 34.771 3.253 35.50
1-3/4" BSW 44.452 5.080 5 41.199 37.946 3.253 38.50
1-7/8" BSW 47.627 5.645 4 1/2 44.012 40.398 3.614 41.25
2" BSW 50.802 5.645 4 1/2 47.187 43.573 3.614 44.50
2-1/4" BSW 57.152 6.350 4 53.086 49.020 4.066 50.00
2-1/2" BSW 63.502 6.350 4 59.436 55.370 4.066 56.00
2-3/4" BSW 69.853 7.257 3 1/2 65.205 60.558 4.647 61.50
3" BSW 76.203 7.257 3 1/2 71.556 66.909 4.647 68.00
3-1/4" BSW 82.553 7.816 3 1/4 77.548 72.544 5.005 73.75
3-1/2" BSW 88.903 7.816 3 1/4 83.899 78.894 5.005 80.00
3-3/4" BSW 95.254 8.467 3 89.832 84.410 5.422 85.50
4" BSW 101.604 8.467 3 96.182 90.760 5.422 92.00
4-1/4" BSW 107.954 8.835 2 7/8 102.297 96.639 5.657 98.00
4-1/2" BSW 114.304 8.835 2 7/8 108.647 102.990 5.657 104.20
4-3/4" BSW 120.665 9.237 2 3/4 114.740 108.625 5.915 110.00
5" BSW 127.005 9.237 2 3/4 121.090 115.176 5.915 116.50
5-1/4" BSW 133.355 9.677 2 5/8 127.159 120.963 6.196 122.50
5-1/2" BSW 139.705 9.677 2 5/8 133.509 127.313 6.196 128.50
5-3/4" BSW 146.055 10.160 2 1/2 139.549 133.043 6.506 134.50
6" BSW 152.406 10.160 2 1/2 145.900 139.394 6.506 141.00
 

Disclaimer
This data is provided for general information only. The intention is to provide accurate information; regardless; errors may exist in the supplied information. If accuracy is critical, base your final decisions on the data provided in the root document: BS 84; which is a copyrighted document. To purchase a copy visit an Authorized Reseller.

Comments:
Original Posting: 2/28/2008
Last Revision: 2/12/2013
Error corrections in, or comments about, the above data can be sent to: gageguy@gagecrib.com

 

About UsUsed SurplusTech InfoCatalogsContact UsBookmarkSitemap
 

 

Top

Gage Crib Worldwide, Inc.
6701 Old 28th St SE, Suite B
Grand Rapids, MI 49546-6937
Phone: 001-616-954-6581 • Fax: 001-616-954-6583
Email: gageguy@gagecrib.com

Copyright © 2002-2012 Ring & Plug Thread Gages. All rights reserved.