MSS SP-44 — Class 300 Flange Dimensions

Name: MSS SP-44 Class 300 Flange Dimensions
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MSS SP-44 Class 300 Flange Dimensions — 25 sizes.

NPS	O — Flange OD · in (in)	tf — Min. thickness · in (in)	X — Hub dia · in (in)	Y — Length thru hub · in (in)	R — Raised face · in (in)	W — Bolt circle · in (in)	Bolts — No.	Hole — Dia · in (in)	Bolt — Size · in (in)
12	20.5	2	14.75	5.12	15	17.75	16	1.25	1-1/8
14	23	2.12	16.75	5.62	16.25	20.25	20	1.25	1-1/8
16	25.5	2.25	19	5.75	18.5	22.5	20	1.38	1-1/4
18	28	2.38	21	6.25	21	24.75	24	1.38	1-1/4
20	30.5	2.5	23.12	6.38	23	27	24	1.38	1-1/4
22	33	2.62	25.25	6.5	25.25	29.25	24	1.62	—
24	36	2.75	27.62	6.62	27.25	32	24	1.62	1-1/2
26	38.25	3.12	28.38	7.25	29.5	34.5	28	1.75	1-5/8
28	40.75	3.38	30.5	7.75	31.5	37	28	1.75	1-5/8
30	43	3.62	32.56	8.25	33.75	39.25	28	1.88	1-3/4
32	45.25	3.88	34.69	8.75	36	41.5	28	2	1-7/8
34	47.5	4	36.88	9.12	38	43.5	28	2	1-7/8
36	50	4.12	39	9.5	40.25	46	32	2.12	2
38	46	4.25	39.12	7.12	40.5	43	32	1.62	1-1/2
40	48.75	4.5	41.25	7.62	42.75	45.5	32	1.75	1-5/8
42	50.75	4.69	43.25	7.88	44.75	47.5	32	1.75	1-5/8
44	53.25	4.88	45.25	8.12	47	49.75	32	1.88	1-3/4
46	55.75	5.06	47.38	8.5	49	52	28	2	1-7/8
48	57.75	5.25	49.38	8.81	51.25	54	32	2	1-7/8
50	60.25	5.5	51.38	9.12	53.5	56.25	32	2.12	2
52	62.25	5.69	53.38	9.38	55.5	58.25	32	2.12	2
54	65.25	6	55.5	9.94	57.75	61	28	2.38	2-1/4
56	67.25	6.06	57.62	10.25	59.75	63	28	2.38	2-1/4
58	69.25	6.25	59.62	10.5	62	65	32	2.38	2-1/4
60	71.25	6.44	61.62	10.75	64	67	32	2.38	2-1/4

All dimensions are in inches (1 in = 25.4 mm).
Class 150 and 300 thickness and hub length include the 0.06 in raised face.
NPS 26–60 dimensions are identical to ASME B16.47 Series A; the difference is material (A694 high-yield grades).
Values are nominal dimensions from the standard; a dash (—) means the value is not listed. Verify against the current edition before design, purchase or fabrication.