Theoretical Weights of Brass Rods and Bars for
Hexagons Whitworth
(Imperial Sizes)
Diameter of Bolt
(in.) 		Size Across Flats Min. to Max.
(in.)		 Size Across Flats Min. to Max.
(mm)		 Kilogrammes per Metre
(kg/m)		 Kilogrammes per 3.6 Metre Length
(kg/3.6m)		 Pounds per Foot
(lb/ft)
1/8 0.216-0.220 5.49-5.59 0.229 0.825 0.15
3/32 0.243-0.248 6.17-6.30 0.291 1.05 0.20
3/16 0.319-0.324 8.10-8.23 0.497 1.79 0.33
7/32 0.410-0.413 10.41-10.49 0.807 2.91 0.54
1/4 0.440-0.445 11.18-11.30 0.937 3.37 0.63
5/16 0.520-0.525 13.21-13.34 1.30 4.70 0.88
3/8 0.595-0.600 15.11-15.24 1.70 6.13 1.14
7/16 0.705-0.710 17.91-18.03 2.39 8.59 1.60
1/2 0.815-0.820 20.70-20.83 3.18 11.46 2.14
9/16 0.915-0.920 23.24-23.37 4.01 14.42 2.69
5/8 1.002-1.010 25.45-25.65 4.83 17.38 3.24
11/16 1.092-1.100 27.74-27.94 5.73 20.61 3.85
3/4 1.192-1.200 30.28-30.48 6.81 24.53 4.58
7/8 1.292-1.300 32.82-33.02 8.00 28.79 5.37
1" 1.468-1.480 37.29-37.59 10.37 37.32 6.97
1-1/8 1.658-1.670 42.11-42.42 13.20 47.51 8.87
1-1/4 1.845-1.860 46.86-47.24 16.37 58.94 11.00
1-3/8 2.035-2.050 51.69-52.07 19.89 71.60 13.36
1-1/2 2.200-2.220 55.88-56.39 23.32 83.96 15.67
1-5/8 2.390-2.410 60.71-61.21 27.49 98.95 18.47
1-3/4 2.555-2.580 64.90-65.53 31.50 113.40 21.17
2" 2.735-2.760 69.47-70.10 36.05 129.78 24.22