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BS 1640

INCHES					METRIC
N.B.	O.D. At Bevel	Short Radius	Long Radius		N.B.	O.D. At Bevel	Short Radius
		A	A	B			A	B	C
3 - 4	1.05	3 - 4	1 1/8	7 - 16	20	26.67	19.05	28.58	11.11
1	1.32	1	1 1/2	7 - 8	25	33.4	25.4	38.1	22.23
1 1/4	1.66	1 1/4	1 7/8	1	32	42.16	31.75	47.63	25.4
1 1/2	1.9	1 1/2	2 1/4	1 1/8	40	48.26	38.1	57.15	28.58
2	2.38	2	3	1 3/8	50	60.33	50.8	76.2	34.93
2 1/2	2.88	2 1/2	3 3/4	1 3/4	65	73.03	63.5	95.25	44.45
3	3.5	3	4 1/2	2	80	88.9	76.2	114.3	50.8
3 1/2	4	3 1/2	5 1/4	2 1/4	90	101.6	88.9	133.35	57.15
4	4.5	4	6	2 1/2	100	114.3	101.6	152.4	63.5
5	5.56	5	7 1/2	3 1/8	125	141.3	127	190.5	79.37
6	6.63	6	9	3 3/4	150	168.28	152.4	228.6	95.25
8	8.63	8	12	5	200	219.08	203.2	304.8	127
10	10.75	10	15	6 1/4	250	273.05	254	381	158.75
12	12.75	12	18	7 1/2	300	323.85	304.8	457.2	190.5
14	14	14	21	8 3/4	350	355.6	355.6	533.4	222.25
16	16	16	24	10	400	406.4	406.4	609.6	254
18	18	18	27	11 1/4	450	457.2	457.2	685.8	285.75
20	20	20	30	12 1/2	500	508	508	762	317.5
22	22	22	33	13 1/2	550	558.8	558.8	838.2	342.9
24	24	24	36	15	600	609.6	609.6	914.4	381

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