AMERICAN Stainless & Supply


Stainless Steel
	Buttweld Fittings Threaded Fittings Pressure Fittings Pipe & Tubing Flanges Valves
Carbon Steel
	Black & Galv. M.I. Fittings Forged Steel Fittings Buttweld Fittings Pipe Flanges Valves Hangers & Accessories
Thermoplastics
	Socket Weld & Threaded Fittings Pipe Flanges Valves Accessories
Copper
	Tube Fittings Accessories
Structural Shapes
	Shapes
Sanitary/High Purity
Industrial Engineered

Bolting Dimensions for 400 lb. Flanges

Nom Pipe Size	Diam of Bolt Circle	Diam of Bolts	Nbr. of Bolts	Length of Studs 1/4" Raised Face
0.50	2.625	0.500	4	3.000
0.75	3.250	0.625	4	3.250
1.00	3.500	0.625	4	3.500
1.25	3.875	0.625	4	3.750
1.50	4.500	0.750	4	4.000
2.00	5.000	0.625	8	4.000
2.50	5.875	0.750	8	4.500
3.00	6.625	0.750	8	4.750
3.50	7.250	0.875	8	5.250
4.00	7.875	0.875	8	5.250
5.00	9.250	0.875	8	6.500
6.00	10.625	0.875	12	5.750
8.00	13.000	1.000	12	6.500
10.00	15.250	1.125	16	7.250
12.00	17.750	1.250	16	7.750
14.00	20.250	1.250	20	8.000
16.00	22.500	1.375	20	8.500
18.00	24.750	1.375	24	8.750
20.00	27.000	1.500	24	9.500
22.00	29.250	1.625	24	10.000
24.00	32.000	1.750	24	10.500
26.00	34.500	1.750	28	11.500
30.00	39.250	2.000	28	13.000
34.00	43.500	2.000	28	13.750
36.00	46.000	2.000	32	14.000
42.00	52.750	2.500	32	16.250
*Stud lengths for lap joint flanges are equal to lengths shown minus 0.5"plus the thickness of two laps of the stub ends.*

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