Fasteners & Hangers

01

The range

Stainless steel

Nine families of fasteners and hangers, led by stainless steel to combat corrosion and prevent fastener failure.

Alongside the catalogue range, supports, hangers, clips and fixings can be stamped and formed on our own tooling, supplied bagged with the fixing and labelled under your own SKU scheme.

Bolts, screws, socket and set screws
Nuts, washers, machine and tapping screws
Threaded rod, studs, eye bolts and bent bolts
Pipe supports, clamps, straps and strut components
Wire rope and chain with accessories
18-8 (300 series) and 410 stainless; 316 on request

About 18-8. 18-8 refers to the 300 series of stainless steel, composed of approximately 18% chromium and 8% nickel — fastener products in 302, 302HQ, 303, 304, 305, 384, XM7 and similar grades. Sizes shown throughout are approximate and may vary.

02

What we carry

Nine families

Family	Covers
Bolts, screws & socket products	Hex and structural bolts, machine bolts, socket screws and set screws
Nuts & washers	Finished, jam, heavy and coupling nuts; nylon insert, slotted, wing, cap and square nuts; lock, flat, finishing and compression washers
Machine & tapping screws	Machine screws and self-tapping screws across the standard head styles
Self-drilling screws	410 stainless, with neoprene or EPDM bonded sealing washers available
Threaded rods, studs & forged eye bolts	Threaded rod from 6-32 to 2-4.5, studs and forged eye bolts
Bent bolts, pins, nails & hinges	Bent bolts and eye bolts, pins, nails, and continuous hinges
Pipe supports	Clevis hangers and U-bolts, sized 1/2″ to 30″
Pipe clamps, straps & strut components	Swivel bands, coach screws, rod couplings, riser clamps, straps, three-bolt pipe clamps, beam clamps, strut channel, strut pipe clamps, spring nuts and strut nuts
Wire rope, chain & accessories	Wire rope with clips, thimbles, swage sleeves, swivel bolt snaps and turnbuckles; NACM standard chain in 316L, long link in 304L, lifting chain in 316L, sash chain in 302 and twist link in 304

swivel band hanger — Pipe clamps, straps and strut components.

coach screw — Pipe clamps, straps and strut components.

wire rope cross section, 7 x 19 — Wire rope construction.

Can't find what you need? Ask — the catalogue range above is what is stocked, not the limit of what can be supplied.

03

Selection charts

By product

Self-drilling screws — drilling capacity 410 stainless — sizes #6 to #14

Nominal size	Point style	Recommended panel thickness	Recommended drill speed (rpm)
#6	N°2	0.059″ - 0.083″	2,500 Max.
#8	N°2	0.059″ - 0.110″	2,500 Max.
#8	N°3	0.098″ - 0.142″	2,500 Max.
#10	N°2	0.059″ - 0.142″	2,500 Max.
#10	N°3	0.110″ - 0.177″	2,500 Max.
#12	N°3	0.110″ - 0.209″	1,800 Max.
#12	N°4	0.177″ - 0.354″	1,800 Max.
#14	N°3	0.110″ - 0.248″	1,800 Max.

Drilling capacity standard for 410 stainless steel self-drilling screws. Also available with neoprene or EPDM bonded sealing washers.

Diameter & thread pitch conversion NC / NF / UN / metric — #1 through 3″

National Coarse (NC)	National Fine (NF)	Unified (UN)	Metric (approx.)
1-64	1-72	—	M2
3-48	3-56	—	M2.5
4-40	4-48	—	M3
6-32	6-40	—	M3.5
8-32	8-36	—	M4
10-24	10-32	—	M5
12-24	12-28	—	—
1/4-20	1/4-28	—	M6
5/16-18	5/16-24	—	M8
3/8-16	3/8-24	—	M10
7/16-14	7/16-20	—	—
1/2-13	1/2-20	—	M12
9/16-12	9/16-18	—	M14
5/8-11	5/8-18	—	M16
3/4-10	3/4-16	—	M20
7/8-9	7/8-14	—	M22
1-8	1-12	—	M24
1 1/8-7	1 1/8-12	1 1/8-8	M30
1 1/4-7	1 1/4-12	1 1/4-8	M32
1 3/8-6	—	1 3/8-8	—
1 1/2-6	—	1 1/2-8	M36
1 3/4-5	—	1 3/4-8	—
2-4.5	—	2-8	—
2 1/2-4	—	2 1/2-8	—
3-4	—	3-8	—

Reference chart. Metric equivalents are approximate.

Threaded rod — weight per foot 19 diameters, 6-32 to 2-4.5

Diameter – threads per inch	Weight (lb/ft)
6-32	0.036
7/16-14	0.40
1 1/4-7	3.54
8-32	0.054
1/2-13	0.54
1 3/8-6	4.23
10-24	0.069
5/8-11	0.83
1 1/2-6	5.12
10-32	0.074
3/4-10	1.25
1 3/4-5	6.35
1/4-20	0.12
7/8-9	1.70
2-4.5	9.12
5/16-18	0.20
1-8	2.23
3/8-16	0.29
1 1/8-7	2.81

Approximate weights. Studs and forged eye bolts are also carried; dimensions on request.

Continuous hinges Six patterns — 72″ lengths

butt hinges — Lettered dimensions refer to the table below.

piano (continuous) hinge, showing the knuckle — Lettered dimensions refer to the table below.

Inches open	Gauge	Length	Pin	Knuckle	Lb each
1 1/16	037	72″	.100	.500	1.25
1 1/2	037	72″	.100	.500	1.50
1 1/2	060	72″	.125	.500	2.50
2	060	72″	.125	.500	3.58
2 1/2	060	72″	.125	.500	3.80
3	075	72″	.250	1.00	7.00

Neither leaf swaged; leaves lay flat in the same plane in the open position. Other sizes available on request. Bent bolts, eye bolts, pins and nails are also carried; dimensions on request.

Pipe supports — clevis hangers & U-bolts Pipe sizes 1/2″ to 30″

Clevis hangers

clevis hanger — dimensions A, B, C, D and E — Lettered dimensions refer to the table below.

U-bolt — dimensions D, L, C and T — Lettered dimensions refer to the table below.

Pipe size	A	B	C	D	E	Max. rec. load (lb)	Lb per 100 pieces
1/2	3/8	2 1/8	1 5/8	3/8	1/4	610	15
3/4	3/8	2 3/8	1 13/16	1/2	1/4	610	16
1	3/8	2 3/4	2	5/8	1/4	610	18
1 1/4	3/8	3 1/4	2 13/32	3/4	1/4	610	27
1 1/2	3/8	3 15/16	2 29/32	1 1/8	1/4	610	32
2	3/8	4 1/2	3 1/4	1 1/8	1/4	610	36
2 1/2	1/2	5 1/4	3 3/4	1 1/8	5/16	1130	58
3	1/2	6	4 3/16	1 1/4	5/16	1130	64
3 1/2	1/2	6 9/16	4 1/2	1 1/4	5/16	1130	110
4	5/8	7 3/4	5 7/16	1 13/16	3/8	1400	113
5	5/8	9 3/4	6 13/16	2	1/2	1400	210
6	3/4	11 3/4	8 1/4	2 11/16	1/2	1900	320
8	3/4	14 3/16	9 5/8	3 1/4	5/8	2000	490
10	7/8	16 1/2	10 7/8	3 1/4	3/4	3600	890
12	7/8	18 5/8	12	3 1/16	3/4	3800	1090
14	1	21 3/4	14 1/2	3 15/16	7/8	4200	1480
16	1	24	15 3/4	4	7/8	4800	2010
18	1	26 3/4	17 1/2	4 11/16	1	4800	2260
20	1 1/4	30	19 11/16	5 3/8	1	4800	3970
24	1 1/4	34	21 3/4	5 1/2	1 1/4	4800	4930
26	1 1/4	36	23 3/4	5 1/2	1 1/4	4800	5700
30	1 1/4	39	23 5/8	4	1 1/4	6000	6200

U-bolts

Pipe size	Rod dia. D	L	C	T	Lb per 100 pieces
1/2	1/4	3 1/4	15/16	2 3/8	7.5
3/4	1/4	3 5/16	1 1/8	2 3/8	8.0
1	1/4	3 7/16	1 3/8	2 3/8	8.1
1 1/4	3/8	3 3/4	1 11/16	2 1/2	21.7
1 1/2	3/8	4	2	2 1/2	23.6
2	3/8	4 1/2	2 7/16	2 1/2	26.6
2 1/2	1/2	5 1/4	2 15/16	3	57.9
3	1/2	5 13/16	3 9/16	3	64.7
3 1/2	1/2	6 5/16	4 1/16	3	70.3
4	1/2	6 13/16	4 9/16	3	76.5
5	1/2	7 13/16	5 5/8	3	88.3
6	5/8	9 1/2	6 3/4	3 3/4	165.1
8	5/8	11 1/2	8 3/4	3 3/4	200.6
10	3/4	13 13/16	10 7/8	4	364.6
12	7/8	16 1/16	12 7/8	4 1/4	562.0
14	7/8	17 5/16	14 1/8	4 1/4	606.7
16	7/8	19 5/16	16 1/8	4 1/4	675.5
18	1	21 11/16	18 1/8	4 3/4	1040.6
20	1	23 11/16	20 1/8	4 3/4	1133.2

Dimensions in inches. Pipe clamps, straps and strut components — swivel bands, coach screws, rod couplings, riser clamps, short straps, three-bolt pipe clamps, beam clamps, strut channel, strut pipe clamps, spring nuts and strut nuts — are carried alongside; dimensions on request.

04

Weight charts

18-8 stainless

Approximate shipping weights for 18-8 stainless steel; add 1% for 316.

Machine screws Pounds per 1,000 pieces — #0 to 3/8″ diameter, lengths 1/8″ to 3″

Length	#0	#1	#2	#3	#4	#5	#6	#8	#10	#12	1/4″	5/16″	3/8″
1/8″	0.09	0.19	0.34	0.49	0.67	0.90	1.18	1.81	2.73	4.00	—	—	—
3/16″	0.12	0.24	0.42	0.59	0.79	1.06	1.37	2.09	3.09	4.49	6.55	—	—
1/4″	0.15	0.29	0.49	0.69	0.91	1.22	1.56	2.38	3.45	4.97	7.20	13.46	—
5/16″	0.18	0.34	0.57	0.79	1.03	1.37	1.74	2.66	3.81	5.46	7.85	14.50	23.84
3/8″	0.21	0.39	0.64	0.89	1.15	1.53	1.93	2.94	4.18	5.94	8.50	15.54	25.37
7/16″	0.24	0.44	0.72	0.99	1.27	1.69	2.11	3.32	4.54	6.43	9.15	16.58	26.90
1/2″	027	0.49	0.79	1.09	1.39	1.85	2.30	3.50	4.90	6.92	9.80	17.63	28.43
9/16″	0.30	0.54	0.87	1.19	1.51	2.01	2.49	3.78	5.26	7.40	10.45	18.67	29.95
5/8″	0.33	0.59	0.94	1.29	1.63	2.17	2.67	4.06	5.63	7.89	11.10	19.71	31.48
3/4″	0.36	0.64	1.09	1.49	1.87	2.49	3.05	4.63	6.35	8.86	12.40	21.79	34.54
7/8″	—	—	1.24	1.69	2.11	2.80	3.42	5.19	7.08	9.83	13.70	23.83	37.59
1″	—	—	1.39	1.89	2.35	3.12	3.79	5.75	7.80	10.80	15.00	25.95	40.65
1 1/8″	—	—	—	—	2.59	3.44	4.16	6.31	8.53	11.77	16.30	28.03	43.71
1 1/4″	—	—	—	—	2.83	3.76	4.54	6.88	9.25	12.74	17.60	30.11	46.76
1 1/2″	—	—	—	—	3.31	4.39	5.28	8.00	10.70	14.69	20.20	34.28	52.87
1 3/4″	—	—	—	—	3.79	5.03	6.03	9.13	12.15	16.63	22.80	38.44	58.99
2″	—	—	—	—	4.27	5.66	6.77	10.25	13.60	18.57	25.40	42.60	65.10
2 1/4″	—	—	—	—	—	—	7.52	11.38	15.05	20.51	28.00	46.76	71.21
2 1/2″	—	—	—	—	—	—	8.26	12.50	16.50	22.46	30.60	50.93	77.32
2 3/4″	—	—	—	—	—	—	9.01	13.63	17.95	24.40	33.20	55.09	83.44
3″	—	—	—	—	—	—	9.75	14.75	19.40	26.34	35.80	59.25	89.55

Nuts Pounds per 100 pieces — hexagon, nylon insert, slotted, wing, cap and square

Hexagon nuts

Diameter	Finished	Finished jam	Heavy	Coupling
1/4″	0.72	0.53	1.20	1.9
5/16″	1.06	0.76	2.02	3.7
3/8″	1.53	1.03	3.20	3.5
7/16″	2.78	1.84	4.70	—
1/2″	3.60	2.59	6.70	5.58
9/16″	5.62	3.67	9.00	—
5/8″	6.92	4.82	11.90	21.00
3/4″	12.70	8.58	19.20	25.20
7/8″	19.90	13.10	29.20	—
1″	29.40	19.30	42.30	—
1 1/8″	41.90	27.00	58.50	—
1 1/4″	59.30	41.10	81.20	—
1 3/8″	78.80	54.30	105.30	—
1 1/2″	101.50	68.90	136.50	—

Other patterns

Diameter	Nylon insert	Slotted hexagon	Wing	Cap	Square
N°10	0.51	0.34	0.75	0.67	0.40
N°12	—	—	—	0.80	0.69
1/4″	0.88	1.03	1.33	1.28	0.76
5/16″	1.07	1.70	2.25	2.69	—
3/8″	1.78	2.70	3.67	3.81	—
7/16″	2.90	3.95	9.00	5.00	—
1/2″	4.24	5.60	8.75	7.00	—
9/16″	7.10	7.50	—	—	—
5/8″	8.65	10.00	23.50	9.36	—
3/4″	12.30	16.40	21.50	13.46	—
7/8″	19.40	24.70	—	30.30	—
1″	25.80	35.60	—	43.59	—
1 1/8″	41.00	49.70	—	—	—
1 1/4″	58.00	69.20	—	—	—
1 3/8″	77.00	91.50	—	—	—
1 1/2″	100.00	120.00	—	—	—

Washers Pounds per 100 pieces — #0 to 1″

Nominal screw or bolt size	Lock	Countersunk finishing	Flat	Flange compression
N° 0 (.060)	0.003	—	0.0095	—
N° 1 (.073)	0.005	—	0.0133	—
N° 2 (.086)	0.011	—	0.0181	—
N° 3 (.099)	0.017	—	0.033	—
N°4 (.112)	0.017	0.05	0.044	—
N°5 (.125)	0.028	—	0.057	—
N°6 (.138)	0.031	0.07	0.051	—
N°8 (.164)	0.054	0.11	0.077	—
N° 10 (.216)	0.079	0.14	0.122	—
N° 12 (.216)	0.119	0.18	0.173	—
1/4″	0.259	0.22	0.362	—
5/16″	0.444	—	0.618	—
3/8″	0.700	—	1.042	—
7/16″	1.021	—	1.854	—
1/2″	1.436	—	2.723	1.12
9/16″	1.977	—	3.185	—
5/8″	2.587	—	4.408	2.27
3/4″	4.293	—	6.810	3.73
7/8″	6.739	—	9.587	5.71
1″	9.662	—	13.943	8.91

05

Thread charts

Unified & metric

Unified thread series Nominal size and threads per inch — 0-80 to 1 7/8-8

Nominal size – threads per inch	Series
0 - 80	UNF
1 - 64	UNC
1 - 72	UNF
2 - 56	UNC
2 - 64	UNF
3 - 48	UNC
3 - 56	UNF
4 - 40	UNC
4 - 48	UNF
5 - 40	UNC
5 - 44	UNF
6 - 32	UNC
6 - 40	UNF
8 - 32	UNC
8 - 36	UNF
10 - 24	UNC
10 - 32	UNF
12 - 24	UNC
12 - 28	UNF
1/4 - 20	UNC
1/4 -28	UNF
5/16 - 18	UNC
5/16 - 24	UNF
3/8 - 16	UNC
3/8 - 24	UNF
7/16 - 14	UNC
7/16 - 20	UNF
1/2 - 13	UNC
1/2 - 20	UNF
9/16 - 12	UNC
9/16 - 18	UNF
5/8 - 11	UNC
5/8 - 18	UNF
3/4 - 10	UNC
3/4 - 16	UNF
7/8 - 9	UNC
7/8 - 14	UNF
1 - 8	UNC
1 - 12	UNF
1 - 14	UNS
1 1/8 - 7	UNC
1 1/8 - 8	UN
1 1/4 - 7	UNC
1 1/4 - 8	UN
1 3/8 - 6	UNC
1 3/8 - 8	UN
1 1/2 - 6	UNC
1 1/2 - 8	UN
1 5/8 - 8	UN
1 3/4 - 5	UNC
1 3/4 - 8	UN

Metric threads — pitch and tapping drill M1 to M76

Size	Pitch (mm)	Tapping drill (mm)
M1	.25	.75
M1.1	.25	.85
M1.2	.25	.95
M1.4	.3	1.10
M1.6	.35	1.25
M1.8	.35	1.45
M2	.4	1.60
M2.2	.45	1.75
M2.5	.45	2.05
M3	.5	2.50
M3.5	.6	2.90
M4	.7	3.30
M4.5	.75	3.75
M5	.8	4.20
M6	1	5.00
M7	1	6.00
M8	1.25	6.75
M9	1.25	7.75
M10	1.5	8.50
M11	1.5	9.50
M12	1.75	10.2
M14	2	12.0
M16	2	14.0
M18	2.5	15.5
M20	2.5	17.5
M22	2.5	19.5
M24	3	21.0
M27	3	24.0
M30	3.5	26.5
M33	3.5	29.5
M36	4	32.0
M39	4	35.0
M42	4.5	37.5
M45	4.5	40.5
M48	5	43.0
M52	5	47.0
M56	5.5	50.5
M60	5.5	54.5
M64	6	58.0
M68	6	62.0
M72	6	66.0
M76	6	70.0

06

Bolt-up charts for flanges

Class 150 – 2500

How many bolts, what diameter and what length to bolt up a flange in each class — the companion charts to the flange dimension tables.

Hex head cap screws — weights Pounds per 100 pieces — 1/4″ to 1″ diameter, finished, stainless and brass

Length	1/4″	5/16″	3/8″	7/16″	1/2″	5/8″	3/4″	7/8″	1″
3/8″	1.23	2.03	—	—	—	—	—	—	—
1/2″	1.36	2.24	3.36	—	—	—	—	—	—
5/8″	1.49	2.45	3.66	—	—	—	—	—	—
3/4″	1.62	2.66	3.97	5.60	8.44	—	—	—	—
7/8″	1.75	2.87	4.28	6.02	8.99	—	—	—	—
1″	1.92	3.08	4.59	6.44	9.55	15.71	23.94	—	—
1 1/4″	2.26	3.62	5.28	7.28	10.66	17.48	26.52	—	—
1 1/2″	2.61	4.16	6.06	8.34	11.92	19.24	29.11	41.46	59.21
1 3/4″	2.96	4.69	6.84	9.40	13.29	21.20	31.70	45.01	63.86
2″	3.30	5.23	7.61	10.45	14.67	23.35	34.54	48.56	68.51
2 1/4″	3.64	5.77	8.38	11.51	16.05	25.50	37.64	52.44	73.16
2 1/2″	3.99	6.30	9.16	12.56	17.42	27.65	40.74	56.66	78.24
2 3/4″	4.34	6.84	9.94	13.61	18.80	29.80	43.84	60.89	83.76
3″	4.68	7.38	10.71	14.67	20.18	31.95	46.94	65.11	89.28
3 1/4″	5.02	7.92	11.48	15.73	21.56	34.10	50.04	69.33	94.80
3 1/2″	5.37	8.46	12.26	16.78	22.94	36.25	53.14	73.56	100.32
3 3/4″	5.72	8.99	13.04	17.83	24.31	38.40	56.24	77.78	105.84
4″	6.06	9.53	13.81	18.89	25.69	40.55	59.34	82.00	111.35
4 1/4″	6.41	10.07	14.59	19.95	27.07	42.70	62.44	86.22	116.84
4 1/2″	6.75	10.60	15.36	21.00	28.44	44.85	65.54	90.44	122.33
4 3/4″	7.10	11.14	16.14	22.06	29.82	47.00	68.64	94.66	127.82
5″	7.44	11.68	16.91	23.11	31.20	49.15	71.74	98.89	133.42
5 1/4″	7.79	12.22	17.69	24.17	32.58	51.30	74.84	103.12	138.94
5 1/2″	8.13	12.76	18.46	25.22	33.96	53.45	77.94	107.34	144.46
5 3/4″	8.48	13.30	19.24	26.28	35.34	55.60	81.04	111.57	149.98
6″	8.82	13.84	20.01	27.33	36.71	57.75	84.14	115.78	155.49
6 1/2″	—	—	—	—	39.47	62.05	90.34	124.22	166.52
7″	—	—	—	—	42.23	66.35	96.54	132.66	177.55
7 1/2″	—	—	—	—	44.99	70.65	102.74	141.10	188.58
8″	—	—	—	—	47.75	74.95	108.94	149.54	199.61

Thread length: up to and including 6″ long, twice the diameter plus 1/4″; over 6″ long, twice the diameter plus 1/2″. All hex caps may carry an additional 1/4″ to 3/8″ of thread, particularly up to 1 1/2″ diameter and lengths over 4″.

Flange bolting — Class 150 to 2500 Number, diameter and length of bolts for each NPS

Class 150

NPS	No. of bolts	Dia. of bolts	Stud 0.0625″ R.F.	Stud ring joint	Hex 0.0625″ R.F.
1/2	4	1/2	2.50	—	2.00
3/4	4	1/2	2.50	—	2.25
1	4	1/2	2.75	3.25	2.25
1 1/4	4	1/2	2.75	3.25	2.50
1 1/2	4	1/2	3.00	3.50	2.50
2	4	5/8	3.25	3.75	2.75
2 1/2	4	5/8	3.50	4.00	3.00
3	4	5/8	3.75	4.25	3.25
3 1/2	8	5/8	3.75	4.25	3.25
4	8	5/8	3.75	4.25	3.25
5	8	3/4	4.00	4.50	3.25
6	8	3/4	4.00	4.50	3.50
8	8	3/4	4.25	4.75	3.75
10	12	7/8	4.75	5.25	4.00
12	12	7/8	4.75	5.25	4.25
14	12	1	5.25	4.75	4.50
16	16	1	5.50	6.00	4.75
18	16	1 1/8	6.00	6.50	5.00
20	20	1 1/8	6.25	6.75	5.50
24	20	1 1/4	7.00	7.50	6.00

Class 300

NPS	No. of bolts	Dia. of bolts	Stud 0.0625″ R.F.	Stud ring joint	Hex 0.0625″ R.F.
1/2	4	1/2	2.75	3.00	2.25
3/4	4	5/8	3.00	3.50	2.50
1	4	5/8	3.25	3.75	2.75
1 1/4	4	5/8	3.25	3.75	2.75
1 1/2	4	3/4	3.75	4.25	3.00
2	8	5/8	3.50	4.25	3.00
2 1/2	8	3/4	4.00	4.75	3.50
3	8	3/4	4.25	5.00	3.75
3 1/2	8	3/4	4.50	5.25	3.75
4	8	3/4	4.50	5.25	4.00
5	8	3/4	4.75	5.50	4.25
6	12	3/4	5.00	5.75	4.25
8	12	7/8	5.50	6.25	4.75
10	16	1	6.25	7.00	5.50
12	16	1 1/8	6.75	7.50	6.00
14	20	1 1/8	7.00	7.75	6.25
16	20	1 1/4	7.50	8.25	6.50
18	24	1 1/4	7.75	8.50	6.75
20	24	1 1/4	8.25	9.00	7.25
24	24	1 1/2	9.25	10.25	8.00

Class 600

NPS	No. of bolts	Dia. of bolts	Stud 0.25″ R.F.	Stud ring joint
1/2	4	1/2	3.25	3.00
3/4	4	5/8	3.50	3.50
1	4	5/8	3.75	3.75
1 1/4	4	5/8	4.00	4.00
1 1/2	4	3/4	4.25	4.25
2	8	5/8	4.25	4.50
2 1/2	8	3/4	4.75	5.00
3	8	3/4	5.00	5.25
3 1/2	8	7/8	5.50	5.75
4	8	7/8	5.75	6.00
5	8	1	6.50	6.75
6	12	1	6.75	7.00
8	12	1 1/8	7.75	8.00
10	16	1 1/4	8.50	8.75
12	20	1 1/4	8.75	9.00
14	20	1 3/8	9.25	9.50
16	20	1 1/2	10.00	10.25
18	20	1 5/8	10.75	11.00
20	24	1 5/8	11.50	11.75
24	24	1 7/8	13.00	13.25

Class 900

NPS	No. of bolts	Dia. of bolts	Stud 0.25″ R.F.	Stud ring joint
1/2	4	3/4	4.25	4.25
3/4	4	3/4	4.50	4.50
1	4	7/8	5.00	5.00
1 1/4	4	7/8	5.00	5.00
1 1/2	4	1	5.50	5.50
2	8	7/8	5.75	5.75
2 1/2	8	1	6.25	6.25
3	8	7/8	5.75	6.00
4	8	1 1/8	6.75	7.00
5	8	1 1/4	7.50	7.75
6	12	1 1/8	7.75	8.00
8	12	1 3/8	8.75	9.00
10	16	1 3/8	9.25	9.50
12	20	1 3/8	10.00	10.25
14	20	1 1/2	10.75	11.25
16	20	1 5/8	11.25	11.75
18	20	1 7/8	12.75	13.50
20	20	2	13.50	14.25
24	20	2 1/2	17.25	18.00

Class 1500

NPS	No. of bolts	Dia. of bolts	Stud 0.25″ R.F.	Stud ring joint
1/2	4	3/4	4.25	4.25
3/4	4	3/4	4.50	4.50
1	4	7/8	5.00	5.00
1 1/4	4	7/8	5.00	5.00
1 1/2	4	1	5.50	5.50
2	8	7/8	5.75	5.75
2 1/2	8	1	6.25	6.25
3	8	1 1/8	7.00	7.00
4	8	1 1/4	7.75	7.75
5	8	1 1/2	9.75	9.75
6	12	1 3/8	10.25	10.50
8	12	1 5/8	11.50	12.00
10	12	1 7/8	13.25	13.75
12	16	2	14.75	15.50
14	16	2 1/4	16.00	17.00
16	16	2 1/2	17.50	18.50
18	16	2 3/4	19.50	20.50
20	16	3	21.50	22.50
24	16	3 1/2	24.50	25.75

Class 2500

NPS	No. of bolts	Dia. of bolts	Stud 0.25″ R.F.	Stud ring joint
1/2	4	3/4	5.25	5.25
3/4	4	3/4	5.25	5.25
1	4	7/8	5.75	5.75
1 1/4	4	1	6.25	6.50
1 1/2	4	1 1/8	7.00	7.25
2	8	1	7.25	7.50
2 1/2	8	1 1/8	8.00	8.25
3	8	1 1/4	9.00	9.25
4	8	1 1/2	10.25	10.75
5	8	1 3/4	12.00	12.75
6	8	2	13.75	14.50
8	12	2	15.25	16.00
10	12	2 1/2	19.50	20.50
12	12	2 3/4	21.50	22.50

The length of a stud bolt is measured first thread to first thread. Bolt sizes are in inches. Sizes shown are approximate and may vary.