Metric Dimensions of Threaded Flanges as per ASME B16.5

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

150# Threaded Flange Dimensions as per ASME B16.5

150# Flange Body Dimensions

NPS	O Flange OD	tf Flange Thickness	X Hub Dia.	Y Hub Length	T Thread Length	Q (Min.) Counter Bore
1/2	90	9.6	30	14	16	23.6
3/4	100	11.2	38	14	16	29
1	110	12.7	49	16	17	35.8
1-1/4	115	14.3	59	19	21	44.4
1-1/2	125	15.9	65	21	22	50.3
2	150	17.5	78	24	25	63.5
2-1/2	180	20.7	90	27	29	76.2
3	190	22.3	108	29	30	92.2
3-1/2	215	22.3	122	30	32	104.9
4	230	22.3	135	32	33	117.6
5	255	22.3	164	35	36	144.4
6	280	23.9	192	38	40	171.4
8	345	27	246	43	44	222.2
10	405	28.6	305	48	49	276.2
12	485	30.2	365	54	56	328.6
14	535	33.4	400	56	57	360.4
16	595	35	457	62	64	411.2
18	635	38.1	505	67	68	462
20	700	41.3	559	71	73	512.8
24	815	46.1	663	81	83	614.4

150# Bolts Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt	SBL RF Stud Bolt Length (RF)	SBL RJ Stud Bolt Length (RJ)	MBL RF Machine Bolt Length (RF)
1/2	60.3	5/8	4	1/2	55	NA	50
3/4	69.9	5/8	4	1/2	65	NA	50
1	79.4	5/8	4	1/2	65	75	55
1-1/4	88.9	5/8	4	1/2	70	85	55
1-1/2	98.4	5/8	4	1/2	70	85	65
2	120.7	3/4	4	5/8	85	95	70
2-1/2	139.7	3/4	4	5/8	90	100	75
3	152.4	3/4	4	5/8	90	100	75
3-1/2	177.8	3/4	8	5/8	90	100	75
4	190.5	3/4	8	5/8	90	100	75
5	215.9	7/8	8	3/4	95	110	85
6	241.3	7/8	8	3/4	100	115	85
8	298.5	7/8	8	3/4	110	120	90
10	362.0	1	12	7/8	115	125	100
12	431.8	1	12	7/8	120	135	100
14	476.3	1-1/8	12	1	135	145	115
16	539.8	1-1/8	16	1	135	145	115
18	577.9	1-1/4	16	1-1/8	145	160	125
20	635.0	1-1/4	20	1-1/8	160	170	140
24	749.3	1-3/8	20	1-1/4	170	185	150

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

300# Threaded Flange Dimensions as per ASME B16.5

300# Flange Body Dimensions

NPS	O Flange OD	tf Flange Thickness	X Hub Dia.	Y Hub Length	T Thread Length	Q (Min.) Counter Bore
1/2	95	12.7	38	21	16	23.6
3/4	115	14.3	48	24	16	29
1	125	15.9	54	25	18	35.8
1-1/4	135	17.5	64	25	21	44.4
1-1/2	155	19.1	70	29	23	50.3
2	165	20.7	84	32	29	63.5
2-1/2	190	23.9	100	37	32	76.2
3	210	27	117	41	32	92.2
3-1/2	230	28.6	133	43	37	104.9
4	255	30.2	146	46	37	117.6
5	280	33.4	178	49	43	144.4
6	320	35	206	51	47	171.4
8	380	39.7	260	60	51	222.2
10	445	46.1	321	65	56	276.2
12	520	49.3	375	71	61	328.6
14	585	52.4	425	75	64	360.4
16	650	55.6	483	81	69	411.2
18	710	58.8	533	87	70	462
20	775	62	587	94	74	512.8
24	915	68.3	702	105	83	614.4

300# Bolts Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt	SBL RF Stud Bolt Length (RF)	SBL RJ Stud Bolt Length (RJ)	MBL RF Machine Bolt Length (RF)
1/2	66.7	5/8	4	1/2	65	75	55
3/4	82.6	3/4	4	5/8	75	90	65
1	88.9	3/4	4	5/8	75	90	65
1-1/4	98.4	3/4	4	5/8	85	95	70
1-1/2	114.3	7/8	4	3/4	90	100	75
2	127.0	3/4	8	5/8	90	100	75
2-1/2	149.2	7/8	8	3/4	100	115	85
3	168.3	7/8	8	3/4	110	120	90
3-1/2	184.2	7/8	8	3/4	110	125	95
4	200.0	7/8	8	3/4	115	125	95
5	235.0	7/8	8	3/4	120	135	110
6	269.9	7/8	12	3/4	120	140	110
8	330.2	1	12	7/8	140	150	120
10	387.4	1-1/8	16	1	160	170	140
12	450.8	1-1/4	16	1-1/8	170	185	145
14	514.4	1-1/4	20	1-1/8	180	190	160
16	571.5	1-3/8	20	1-1/4	190	205	165
18	628.6	1-3/8	24	1-1/4	195	210	170
20	685.8	1-3/8	24	1-1/4	205	220	185
24	812.8	1-5/8	24	1-1/2	230	255	205

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

400# Threaded Flange Dimensions as per ASME B16.5

400# Flange Body Dimensions

NPS	O Flange OD	tf Flange Thickness	X Hub Dia.	Y Hub Length	T Thread Length	Q (Min.) Counter Bore
1/2	95	14.3	38	22	16	10
3/4	115	15.9	48	25	16	11
1	125	17.5	54	27	18	13
1-1/4	135	20.7	64	29	21	14
1-1/2	155	22.3	70	32	23	16
2	165	25.4	84	37	29	17
2-1/2	190	28.6	100	41	32	19
3	210	31.8	117	46	35	21
3-1/2	230	35	133	49	40	104.9
4	255	35	146	51	37	117.6
5	280	38.1	178	54	43	144.4
6	320	41.3	206	57	46	171.4
8	380	47.7	260	68	51	222.2
10	445	54	321	73	56	276.2
12	520	57.2	375	79	61	328.6
14	585	60.4	425	84	64	360.4
16	650	63.5	483	94	69	411.2
18	710	66.7	533	98	70	462
20	775	69.9	587	102	74	512.8
24	915	76.2	702	114	83	614.4

400# Bolts Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt	SBL RF Stud Bolt Length (RF)	SBL RJ Stud Bolt Length (RJ)	MBL RF Machine Bolt Length (RF)
1/2	66.7	5/8	4	1/2	75	70	75
3/4	82.6	3/4	4	5/8	90	85	90
1	88.9	3/4	4	5/8	90	85	90
1-1/4	98.4	3/4	4	5/8	95	90	95
1-1/2	114.3	7/8	4	3/4	110	100	110
2	127.0	3/4	8	5/8	110	100	110
2-1/2	149.2	7/8	8	3/4	120	115	120
3	168.3	7/8	8	3/4	125	120	125
3-1/2	184.2	1	8	7/8	140	135	140
4	200.0	1	8	7/8	140	135	140
5	235.0	1	8	7/8	145	135	145
6	269.9	1	12	7/8	150	145	150
8	330.0	1-1/8	12	1	170	165	170
10	387.4	1-1/4	16	1-1/8	190	185	190
12	450.8	1-3/8	16	1-1/4	205	195	205
14	514.4	1-3/8	20	1-1/4	210	205	210
16	571.5	1-1/2	20	1-3/8	220	215	220
18	628.6	1-1/2	24	1-3/8	230	220	230
20	685.8	1-5/8	24	1-1/2	240	235	250
24	812.8	1-7/8	24	1-3/4	265	260	280

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

600# Threaded Flange Dimensions as per ASME B16.5

600# Flange Body Dimensions

NPS	O Flange OD	tf Flange Thickness	X Hub Dia.	Y Hub Length	T Thread Length	Q (Min.) Counter Bore
1/2	95	14.3	38	22	16	23.6
3/4	115	15.9	48	25	16	29
1	125	17.5	54	27	18	35.8
1-1/4	135	20.7	64	29	21	44.4
1-1/2	155	22.3	70	32	23	50.6
2	165	25.4	84	37	29	63.5
2-1/2	190	28.6	100	41	32	76.2
3	210	31.8	117	46	35	92.2
3-1/2	230	35	133	49	40	104.9
4	275	38.1	152	54	42	117.6
5	330	44.5	189	60	48	144.4
6	355	47.7	222	67	51	171.4
8	420	55.6	273	76	58	222.2
10	510	63.5	343	86	66	276.2
12	560	66.7	400	92	70	328.6
14	605	69.9	432	94	74	360.4
16	685	76.2	495	106	78	411.2
18	745	82.6	546	117	80	462
20	815	88.9	610	127	83	512.8
24	940	101.6	718	140	93	614.4

600# Bolts Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt	SBL RF Stud Bolt Length (RF)	SBL RJ Stud Bolt Length (RJ)	MBL RF Machine Bolt Length (RF)
1/2	66.7	5/8	4	1/2	75	70	75
3/4	82.6	3/4	4	5/8	90	85	90
1	88.9	3/4	4	5/8	90	85	90
1-1/4	98.4	3/4	4	5/8	95	90	95
1-1/2	114.3	7/8	4	3/4	110	100	110
2	127.0	3/4	8	5/8	110	100	110
2-1/2	149.2	7/8	8	3/4	120	115	120
3	168.3	7/8	8	3/4	125	120	125
3-1/2	184.2	1	8	7/8	140	135	140
4	215.9	1	8	7/8	145	140	145
5	266.7	1-1/8	8	1	165	160	165
6	292.1	1-1/8	12	1	170	165	170
8	349.2	1-1/4	12	1-1/8	190	185	195
10	431.8	1-3/8	16	1-1/4	215	210	215
12	489.0	1-3/8	20	1-1/4	220	215	220
14	527.0	1-1/2	20	1-3/8	235	230	235
16	603.2	1-5/8	20	1-1/2	255	250	255
18	654.0	1-3/4	20	1-5/8	275	265	275
20	723.9	1-3/4	24	1-5/8	285	280	290
24	838.2	2	24	1-7/8	330	325	335

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

900# Threaded Flange Dimensions as per ASME B16.5

900# Flange Body Dimensions

NPS	O Flange OD	tf Flange Thickness	X Hub Dia.	Y Hub Length	T Thread Length	Q (Min.) Counter Bore
1/2	120	22.3	38	32	23	23.6
3/4	130	25.4	44	35	26	29
1	150	28.6	52	41	29	35.8
1-1/4	160	28.6	64	41	31	44.4
1-1/2	180	31.8	70	44	32	50.6
2	215	38.1	105	57	39	63.5
2-1/2	245	41.3	124	64	48	76.2
3	240	38.1	127	54	42	92.2
4	290	44.5	159	70	48	117.6
5	350	50.8	190	79	54	144.4
6	380	55.6	235	86	58	171.4
8	470	63.5	298	102	64	222.2
10	545	69.9	368	108	72	276.2
12	610	79.4	419	117	77	328.6
14	640	85.8	451	130	83	360.4
16	705	88.9	508	133	86	411.2
18	785	101.6	565	152	89	462
20	855	108	622	159	93	512.8
24	1040	139.7	749	203	102	614.4

900# Bolts Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt	SBL RF Stud Bolt Length (RF)	SBL RJ Stud Bolt Length (RJ)	MBL RF Machine Bolt Length (RF)
1/2	82.6	7/8	4	3/4	110	100	110
3/4	88.9	7/8	4	3/4	115	110	115
1	101.6	1	4	7/8	125	120	125
1-1/4	111.1	1	4	7/8	125	120	125
1-1/2	123.8	1-1/8	4	1	140	135	140
2	165.1	1	8	7/8	145	140	145
2-1/2	190.5	1-1/8	8	1	160	150	160
3	190.5	1	8	7/8	145	140	145
4	235.0	1-1/4	8	1-1/8	170	165	170
5	279.4	1-3/8	8	1-1/4	190	185	190
6	317.5	1-1/4	12	1-1/8	190	185	195
8	393.7	1-1/2	12	1-3/8	220	215	220
10	469.9	1-1/2	16	1-3/8	235	230	235
12	533.4	1-1/2	20	1-3/8	255	250	255
14	558.8	1-5/8	20	1-1/2	275	265	280
16	616.0	1-3/4	20	1-5/8	285	280	290
18	685.8	2	20	1-7/8	325	320	335
20	749.3	2-1/8	20	2	350	345	360
24	901.7	2 5/8	20	2-1/2	440	430	455

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

1500# Threaded Flange Dimensions as per ASME B16.5

1500# Flange Body Dimensions

NPS	O Flange OD	tf Flange Thickness	X Hub Dia.	Y Hub Length	T Thread Length	Q (Min.) Counter Bore
1/2	120	22.3	38	32	23	23.6
3/4	130	25.4	44	35	26	29
1	150	28.6	52	41	29	35.8
1-1/4	160	28.6	64	41	31	44.4
1-1/2	180	31.8	70	44	32	50.6
2	215	38.1	105	57	39	63.5
2-1/2	245	41.3	124	64	48	76.2

1500# Bolts Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt	SBL RF Stud Bolt Length (RF)	SBL RJ Stud Bolt Length (RJ)	MBL RF Machine Bolt Length (RF)
1/2	82.6	7/8	4	3/4	110	100	110
3/4	88.9	7/8	4	3/4	115	110	115
1	101.6	1	4	7/8	125	120	125
1-1/4	111.1	1	4	7/8	125	120	125
1-1/2	123.8	1-1/8	4	1	140	135	140
2	165.1	1	8	7/8	145	140	145
2-1/2	190.5	1-1/8	8	1	160	150	160

150# | 300# | 400# | 600# | 900# | 1500# | 2500#

2500# Threaded Flange Dimensions as per ASME B16.5

2500# Flange Body Dimensions

NPS	O Flange OD	tf Flange Thickness	X Hub Dia.	Y Hub Length	T Thread Length	Q (Min.) Counter Bore
1/2	135	30.2	43	40	29	23.6
3/4	140	31.8	51	43	32	29
1	160	35	57	48	35	35.8
1-1/4	185	38.1	73	52	39	44.4
1-1/2	205	44.5	79	60	45	50.6
2	235	50.9	95	70	51	63.5
2-1/2	265	57.2	114	79	58	76.2

2500# Bolts Template

NPS	BCD Bolt Circle Dia.	BHD Bolt Hole Dia	BOLTS Number of Bolts	BD Dia. Of Bolt	SBL RF Stud Bolt Length (RF)	SBL RJ Stud Bolt Length (RJ)	MBL RF Machine Bolt Length (RF)
1/2	88.9	7/8	4	3/4	120	115	120
3/4	95.2	7/8	4	3/4	125	120	125
1	108.0	1	4	7/8	140	135	140
1-1/4	130.2	1-1/8	4	1	150	145	150
1-1/2	146.0	1-1/4	4	1-1/8	170	165	170
2	171.4	1-1/8	8	1	180	170	180
2-1/2	196.8	1-1/4	8	1-1/8	195	190	205

The Piping Engineering World

Metric Dimensions of Threaded Flanges as per ASME B16.5

150# Threaded Flange Dimensions as per ASME B16.5

150# Flange Body Dimensions

150# Bolts Template

300# Threaded Flange Dimensions as per ASME B16.5

300# Flange Body Dimensions

300# Bolts Template

400# Threaded Flange Dimensions as per ASME B16.5

400# Flange Body Dimensions

400# Bolts Template

600# Threaded Flange Dimensions as per ASME B16.5

600# Flange Body Dimensions

600# Bolts Template

900# Threaded Flange Dimensions as per ASME B16.5

900# Flange Body Dimensions

900# Bolts Template

1500# Threaded Flange Dimensions as per ASME B16.5

1500# Flange Body Dimensions

1500# Bolts Template

2500# Threaded Flange Dimensions as per ASME B16.5

2500# Flange Body Dimensions

2500# Bolts Template

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