ASME B16.5 threaded flanges, Class 150

Every size in the table, in mm, with a 3D model drawn from the same figures. See threaded flanges for materials, standards and the marking.

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6" Class 150 threaded

Dimensions

Standard

Rating

Type

Units

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Threaded flanges, ASME B16.5 Class 150, dimensions in mm
DNNominal size	OFlange diameter	TfFlange thickness	XHub diameter	YLength through hub	TThread length	QCounterbore	RRaised face diameter	TrRaised face height	WBolt circle (PCD)	dBolt hole diameter	nNumber of holes	kgWeight, approx.	Enquiry list
15	90	9.6	30	16	16	not listed	34.9	2	60.3	15.9	4	0.4
20	100	11.2	38	16	16	not listed	42.9	2	69.9	15.9	4	0.7
25	110	12.7	49	18	18	not listed	50.8	2	79.4	15.9	4	0.9
32	115	14.3	59	21	21	not listed	63.5	2	88.9	15.9	4	1.2
40	125	15.9	65	23	23	not listed	73	2	98.4	15.9	4	1.5
50	150	17.5	78	26	26	not listed	92.1	2	120.7	19	4	2.3
65	180	20.7	90	29	29	not listed	104.8	2	139.7	19	4	3.7
80	190	22.3	108	31	31	not listed	127	2	152.4	19	4	4.2
90	215	22.3	122	32	32	not listed	139.7	2	177.8	19	8	5.3
100	230	22.3	135	34	34	not listed	157.2	2	190.5	19	8	5.9
125	255	22.3	164	37	37	not listed	185.7	2	215.9	22.2	8	7
150	280	23.9	192	40	40	not listed	215.9	2	241.3	22.2	8	8.4	In the viewer
200	345	27	246	45	45	not listed	269.9	2	298.5	22.2	8	13
250	405	28.6	305	50	50	not listed	323.8	2	362	25.4	12	17.8
300	485	30.2	365	56	56	not listed	381	2	431.8	25.4	12	29.5
350	535	33.4	400	58	58	not listed	412.8	2	476.3	28.6	12	not listed
400	595	35	457	64	64	not listed	469.9	2	539.8	28.6	16	47
450	635	38.1	505	69	69	not listed	533.4	2	577.9	31.7	16	54
500	700	41.3	559	73	73	not listed	584.2	2	635	31.7	20	68
600	815	46.1	663	83	83	not listed	692.2	2	749.3	34.9	20	93

Dimensions in mm, for reference. Tolerances and full requirements as per the applicable standard. Confirm against your specification before ordering.

Source: Shiv Shakti Machine Tools Flange Catalogue, edition 2026 (draft), page 9, weights page 15. “–” means the catalogue lists no value.

[CONFIRM: table checked and signed off by the owners (unverified)][CONFIRM: whether the flange thickness includes the raised face]