size	1/4*3/8	3/8*(1/8-1/4)	1/2*(1/8-3/8)	3/4*(1/8-1/2)	1*(1/8-3/4)	11/4*(1/4-1)	11/2*(3/4-11/4)	2*(1/4-11/2)	21/2*(1/4-2)	3*(1/2-21/2)	4*(3/4-3)
L	17	18	21	25	26	28	30	37	39	42	52
L1	11	12	15	17	19	21	21.5	26	28	31	39
S	15	18.5	22.5	28.5	35	44.5	50	62	78

Investment casting process
Material: ss 304/316, 304L/316L, AISI304/AISI316
Thread: BSP,DIN2999,NPT,BSPT
working pressure: 150 LBS