Charts & Specs

Bolting Data 1500

Bolting Data for ASME B16.5 & BS 1560 Flanges
Nominal
Pipe Size
Class 1500
Flange Dia. No. of Bolts Bolt Diameter B.C. Diameter
1/4 43/4 4 3/4 3-1/4
1/2 5-1/8 4 3/4 3-1/2
3/4 5-7/8 4 7/8 4
1 5-7/8 4 7/8 4
1-1/4 6-1/4 4 7/8 4-3/8
1-1/2 7 4 1 4-7/8
2 8-1/2 8 7/8 6-1/2
2-1/2 9-5/8 8 1 7-1/2
3 10-1/2 8 1-1/8 8
4 12-1/4 8 1-1/4 9-1/2
5 14-3/4 8 1-1/2 11-1/2
6 15-1/2 12 1-3/8 12-1/2
8 19 12 1-5/8 15-1/2
10 23 12 1-7/8 19
12 26-1/2 16 2 22-1/2
14 29-1/2 16 2-1/4 25
16 32-1/2 16 2-1/2 27-3/4
18 36 16 2-3/4 30-1/2
20 38-3/4 16 3 23-3/4
24 46 16 3-1/2 39