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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		Long Radius
		O	K	O	K			O	K	O	K
3 - 4	1.05	1 1/2	1 5/16	2 1/4	1 11/16	20	26.67	38.1	33.34	57.15	42.86
1	1.32	2	1 5/8	3	2 3/16	25	33.4	50.8	41.28	76.2	55.56
1 1/4	1.66	2 1/2	2 1/16	3 3/4	2 3/4	32	42.16	63.5	52.39	95.25	69.85
1 1/2	1.9	3	2 7/16	4 1/2	3 1/4	40	48.26	76.2	61.91	114.3	82.55
2	2.38	4	3 3/16	6	4 3/16	50	60.33	101.6	80.96	152.4	106.36
2 1/2	2.88	5	3 15/16	7 1/2	5 3/16	65	73.03	127	100.01	190.5	131.76
3	3.5	6	4 3/4	9	6 1/4	80	88.9	152.4	120.65	228.6	158.75
3 1/2	4	7	5 1/2	10 1/2	7 1/4	90	101.6	177.8	139.7	266.7	184.15
4	4.5	8	6 1/4	12	8 1/4	100	114.3	203.2	158.75	304.8	209.55
5	5.56	10	7 3/4	15	10 5/16	125	141.3	254	196.85	381	261.94
6	6.63	12	9 5/16	18	12 5/16	150	168.28	304.8	236.54	457.2	312.74
8	8.63	16	12 5/16	24	16 5/16	200	219.08	406.4	312.74	609.6	414.34
10	10.75	20	15 3/8	30	20 3/8	250	273.05	508	390.53	762	514.53
12	12.75	24	18 3/8	36	24 3/8	300	323.85	609.6	466.73	914.4	619.13
14	14	28	21	42	28	350	355.6	711.2	533.4	1066.8	711.2
16	16	32	24	48	32	400	406.4	812.8	609.6	1219.2	812.8
18	18	36	27	54	36	450	457.2	914.4	685.8	1371.6	914.4
20	20	40	30	60	40	500	508	1016	762	1524	1016
22	22	44	33	66	44	550	558.8	1117.6	838.2	1676.4	1117.6
24	24	48	36	72	48	600	609.6	1219.2	914.4	1828.8	1219.2

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