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Stud Bolts Charts (for Flanges)

3 important stud bolts charts: 1- stud bolts dimensions in inches and millimeters (number, diameter, length of stud bolts for ASME flanges of different diameter and rating); 2- stud bolts weight (in kilograms and pounds for metric and imperial bolts, by diameter and length); 3- stud bolt torque chart (tightening sequence and load to ensure proper flanged joints).

STUD BOLTS SIZES (IN INCHES)

Stud bolt and nut for flange
Stud bolts and nuts for flanges

CLASS 150 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 150 (in inches)

 Class 150 Flanges ASME B16.5 (Stud bolt sizes)Length of Stud Bolts 
NPSOutside Diameter of FlangeThe diameter of Bolt CircleThe diameter of Bolt HolesNumber of BoltsDiameter of BoltsRaised Face
0.06 in
Ring Joint
1/23 1/22 3/85/841/22 1/4
3/43 7/82 3/45/841/22 1/2
14 1/43 1/85/841/22 1/23
1 1/44 5/83 1/25/841/22 3/43 1/4
1 1/253 7/85/841/22 3/43 1/4
264 3/43/445/83 1/43 3/4
2 1/275 1/23/445/83 1/24
37 1/263/445/83 1/24
3 1/28 1/273/485/83 1/24
497 1/23/485/83 1/24
5108 1/27/883/43 3/44 1/4
6119 1/27/883/444 1/2
813 1/211 3/47/883/44 1/44 3/4
101614 3/41127/84 1/25
1219171127/84 3/45 1/4
142118 3/41 1/81215 1/45 3/4
1623 1/221 1/41 1/81615 1/45 3/4
182522 3/41 1/4161 1/85 3/46 1/4
2027 1/2251 1/4201 1/86 1/46 3/4
243229 1/21 1/4201 1/46 3/47 1/4

 

CLASS 300 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 300 (in inches)

  Class 300 Flanges ASME B16.5Length of Stud Bolts 
NPSOutside Diameter of FlangeThe diameter of Bolt CircleThe diameter of Bolt HolesNumber of BoltsDiameter of BoltsRaised Face
0.06 in
Ring Joint
1/23 3/42 5/85/841/22 1/23
3/44 5/83 1/43/445/833 1/2
14 7/83 1/23/445/833 1/2
1 1/45 1/43 7/83/445/83 1/43 3/4
1 1/26 1/84 1/27/843/43 1/24
26 1/253/485/83 1/24
2 1/27 1/25 7/87/883/444 1/2
38 1/46 5/87/883/44 1/44 3/4
3 1/297 1/47/883/44 1/45
4107 7/87/883/44 1/25
5119 1/47/883/44 3/45 1/4
612 1/210 5/87/8123/44 3/45 1/2
815131127/85 1/26
1017 1/215 1/41 1/81616 1/46 3/4
1220 1/217 3/41 1/4161 1/86 3/47 1/4
142320 1/41 1/4201 1/877 1/2
1625 1/222 1/21 3/8201 1/47 1/28
182824 3/41 3/8241 1/47 3/48 1/4
2030 1/2271 3/8241 1/488 3/4
2436321 5/8241 1/2910

 

CLASS 600 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 600 (in inches)

   Class 600 Flanges ASME B16.5Length of Stud Bolts
NPSOutside Diameter of FlangeThe diameter of Bolt CircleThe diameter of Bolt HolesNumber of BoltsDiameter of BoltsRaised Face
0.06 in
Ring Joint
1/23 3/42 5/85/841/233
3/44 5/83 1/43/445/83 1/23 1/2
14 7/83 1/23/445/83 1/23 1/2
1 1/45 1/43 7/83/445/83 3/43 3/4
1 1/26 1/84 1/27/843/44 1/44 1/4
26 1/253/485/84 1/44 1/4
2 1/27 1/25 7/87/883/44 3/44 3/4
38 1/46 5/87/883/455
3 1/297 1/4187/85 1/25 1/2
410 3/48 1/2187/85 3/45 3/4
51310 1/21 1/8816 1/26 1/2
61411 1/21 1/81216 3/46 3/4
816 1/213 3/41 1/4121 1/87 1/27 3/4
1020171 3/8161 1/48 1/28 1/2
122219 1/41 3/8201 1/48 3/48 3/4
1423 3/420 3/41 1/2201 3/89 1/49 1/4
162723 3/41 5/8201 1/21010
1829 1/425 3/41 3/4201 5/810 3/410 3/4
203228 1/21 3/4241 5/811 1/411 1/2
2437332241 7/81313 1/4

 

CLASS 900 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 900 (in inches)

    Class 900 Flanges ASME B16.5Length of Stud Bolts
NPSOutside Diameter of FlangeThe diameter of Bolt CircleThe diameter of Bolt HolesNumber of BoltsDiameter of BoltsRaised Face
0.06 in
Ring Joint
1/24 3/43 1/47/843/44 1/44 1/4
3/45 1/83 1/27/843/44 1/24 1/2
15 7/84147/855
1 1/46 1/44 3/8147/855
1 1/274 7/81 1/8415 1/25 1/2
28 1/26 1/2187/85 3/45 3/4
2 1/29 5/87 1/21 1/8816 1/46 1/4
39 1/27 1/2187/85 3/45 3/4
411 1/29 1/41 1/481 1/86 3/46 3/4
513 3/4111 3/881 1/47 1/27 1/2
61512 1/21 1/4121 1/87 1/27 3/4
818 1/215 1/21 1/2121 3/88 3/88 3/4
1021 1/218 1/21 1/2161 3/89 1/49 1/4
1224211 1/2201 3/81010
1425 1/4221 5/8201 1/210 3/411
1627 3/424 1/41 3/4201 5/811 1/411 1/2
1831272201 7/812 3/413 1/4
2033 3/429 1/22 1/820213 3/414 1/4
244135 1/22 5/8202 1/217 1/418

 

CLASS 1500 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 1500 (in inches)

     Class 1500 Flanges ASME B16.5Length of Stud Bolts
NPSOutside Diameter of FlangeThe diameter of Bolt CircleThe diameter of Bolt HolesNumber of BoltsDiameter of BoltsRaised Face
0.06 in
Ring Joint
1/24 3/43 1/47/843/44 1/44 1/4
3/45 1/83 1/27/843/44 1/24 1/2
15 7/84147/855
1 1/46 1/44 3/8147/855
1 1/274 7/81 1/8415 1/25 1/2
28 1/26 1/2187/85 3/45 3/4
2 1/29 5/87 1/21 1/8816 1/46 1/4
310 1/281 1/481 1/877
412 1/49 1/21 3/881 1/47 3/47 3/4
514 3/411 1/21 5/881 1/29 3/49 3/4
615 1/212 1/21 1/2121 3/810 1/410 1/2
81915 1/21 3/4121 5/811 1/212 3/4
1023192121 7/813 1/413 1/2
1226 1/222 1/22 1/816214 3/415 1/4
1429 1/2252 3/8162 1/41616 3/4
1632 1/227 3/42 5/8162 1/217 1/218 1/2
183630 1/22 7/8162 3/419 1/220 3/4
2038 3/432 3/43 1/816321 1/422 1/4
2446393 5/8163 1/224 1/425 1/2

 

STUD BOLTS SIZES (IN MILLIMETERS)

CLASS 150 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 150 (in millimeters)

NPSSTUD BOLTS DIAMETER in.LENGHT RFLENGHT
RTJ
STUD BOLTS NUMBER
1/21/2554
3/41/265..4
11/265754
1.1/41/270854
1.1/21/270854
25/885954
2.1/25/8901004
35/8901004
3.1/25/8901008
45/8901008

 

NPSSTUD BOLTS DIAMETER in.LENGHT RFLENGHT
RTJ
STUD BOLTS NUMBER
53/4951108
63/41001158
83/41101208
107/811512512
127/812013512
14113514512
16113514516
181.1/814516016
201.1/816017020
241.1/417018520

 

CLASS 300 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 300 (in millimeters)

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
BOLTS NUMBER
1/21/265754
3/45/875904
15/875904
1.1/45/885954
1.1/23/4901004
25/8901008
2.1/23/41001158
33/41101208
3.1/23/41101258
43/41151258

 

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
BOLTS NUMBER
53/41201358
63/412014012
87/814015012
10116017016
121.1/817018516
141.1/818019020
161.1/419020520
181.1/419521024
201.1/420522024
241.1/223025524

CLASS 400 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 400 (in millimeters)

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
BOLTS NUMBER
1/21/275754
3/45/890904
15/890904
1.1/45/895954
1.1/23/41101104
25/81101108
2.1/23/41201208
33/41251258
3.1/27/81401408
47/81401408

 

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
BOLTS NUMBER
57/81451458
67/815015012
8117017012
101.1/819019016
121.1/420520516
141.1/421021020
161.3/822022020
181.3/823023024
201.1/224025024
241.3/426528024

CLASS 600 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 600 (in millimeters)

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
1/21/275754
3/45/890904
15/890904
1.1/45/895954
1.1/23/41101104
25/81101108
2.1/23/41201208
33/41251258
3.1/27/81401408
47/81451458

 

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
511651658
6117017012
81.1/819019512
101.1/421521516
121.1/422022020
141.3/823523520
161.1/225525520
181.5/827527520
201.5/828529024
241.7/833033524

CLASS 900 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 900 (in millimeters)

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
1/23/41101104
3/43/41151154
17/81251254
1.1/47/81251254
1.1/211401404
27/81451458
2.1/211601608
37/81451458
41.1/81701708
51.1/41901908

 

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
61.1/819019512
81.3/822022012
101.3/823523516
121.3/825525520
141.1/227528020
161.5/828529020
181.7/832533520
20235036020
242.1/244045520

 Lengths in mm

CLASS 1500 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 1500 (in millimeters)

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
1/23/41101104
3/43/41151154
17/81251254
1.1/47/81251254
1.1/211401404
27/81451458
2.1/211601608
31.1/81801808
41.1/41951958
51.1/22502508

 

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
61.3/826026512
81.5/829030012
101.7/833534512
12237538516
142.1/440542516
162.1/244547016
182.3/449552516
20354056516
243.1/261565016

CLASS 2500 FLANGES

Stud bolts dimensions for ASME B16.5 RF and RTJ flanges class 2500 (in millimeters)

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
1/23/41201204
3/43/41251254
17/81401404
1.1/411501504
1.1/21.1/81701704
211801808
2.1/21.1/81952058

 

NPSSTUD BOLTS
DIAMETER in.
LENGHT
RF
LENGHT
RTJ
STUD BOLTS
NUMBER
61.3/826026512
81.5/829030012
101.7/833534512
12237538516
142.1/440542516
162.1/244547016
182.3/449552516
20354056516
243.1/261565016

 

STUD BOLTS WEIGHT

WEIGHT IMPERIAL STUD BOLTS

The table shows the weight in kgs. for 100 imperial stud bolts, including 1 threaded rod and 2 heavy hexagonal nuts

STUD BOLT LENGTH (in inches)1/25/83/47/811 1/81 1/41.3/81 1/21.5/81.3/41 7/8
2.1/210.8
2.3/411.619.8
3.1/412.42132.4
3.1/213.222.234.350
41423.436.252.671.8
4.1/214.824.638.155.275.2102
4.3/415.625.84057.878.6106137
516.42741.960.482111142179
5.1/217.228.243.86385.4115147186234
61829.445.765.688.8119153193242289
6.1/418.830.647.668.292.2123158200250298263
6.1/219.632.349.570.895.6128164206258308374437
720.433.550.873.499132169213266317385449
7.1/221.234.852.775.5103136174220275326396462
82236.154.578106141180226283336407475
8.1/437.356.380.5108145185233291345418488
8.3/438.658.183.1112149191240299354429500
939.86085.6115153196246307364440513
9.1/241.161.888.2118158201253316373451526
1063.790.7122162206260324382463538
10/1.493.3125166212267332391474551
1.0.1/2128171217273340401485564
11132175223279345410496576
11.1/2135179228285350419507589
12138184233292358429518602

WEIGHT OF METRIC STUD BOLTS

The table shows the weight in kgs. for 100 metric stud bolts, including 1 threaded rod and 2 heavy hexagonal nuts.

STUD BOLT LENGTH (in mm)M10M12M14M16M18M20M22M24M27M30M33M36M39
605,68,11215,6
706,18,91316,923,7
806,69,61418,225,432,5
907,110,31519,627,134,545,5
1007,611162128,836,747,254,2
1108,111,71722,230,438,748,358,280
1208,612,41823,632,140,750,960,284,7107
1309,113,21924,933,742,853,463,288,6111141
1409,614,22026,235,444,955,966,292,4116147185
15010,114,920,827,536,946,958,569,296,3121153192237
16010,615,621,829,138,6496172,2100,1126159199245
17016,422,830,440,251,163,575,2104130165206253
18023,831,841,952,366,178,1108135171213261
19033,143,554,468,481,1112140176219269
20034,545,256,27184116144182226278
21035,846,858,573,588,4120149188233286
22037,148,460,676,191,4124154194240294
23038,550,162,678,694,4127159201247302
24039,851,764,781,297,4130,9164208253310
25041,153,466,883,7100,4134,8172214260319
2605568,886,3103,4138,6177220267327
27056,670,988,8106,4142,5182224274335
28058,37391,4109,4146,3187230281343
2907593,9112,4150,1192236291360
30077,196,5115,4154196241298368
320101,6121,3161,7206253312380
340127,3169,4215265326395
360133,3177,1224276340411
380184,8234288353428
400192,5243299367444
420252311381460
440262322394477
460271334408493
480281345422509
500290357436526

Stud bolt weight includes 2 heavy hex steel nuts

STUD BOLTS TORQUE CHART

The stud bolt and nut torque chart show the sequence to use, and the force to apply, to stud bolts used to tighten flanges (by flange class).
The torque chart is for reference only and assumes properly lubricated ASTM A193 B7 stud bolts with ASTM A194 2H steel nuts.

CLASS 150 FLANGE

Stud bolt torque chart for ASME B16.5 FF and RF class 150 flanges

Flange
Size
B16.5 Class 150 RF/ Ring GasketsB16.5 Class 150 FF/ Full Face Gaskets
Torque / Round (ft-lbs)Stud Bolts Tighten SequenceTorque / Round (ft-lbs)Stud Bolts Tighten Sequence
1st2ndFinalDwg/No.Bolt Size1st2ndFinalDwg*/No.Bolt Size
1/2″1020304-bolt1/2″2040604-bolt1/2″
3/4″1327404-bolt1/2″2040604-bolt1/2″
1″1530504-bolt1/2″2040604-bolt1/2″
1-1/4″2040604-bolt1/2″2040604-bolt1/2″
1-1/2″2040604-bolt1/2″2040604-bolt1/2″
2″40801204-bolt5/8″40801204-bolt5/8″
2-1/2″40801204-bolt5/8″40801204-bolt5/8″
3″40801204-bolt5/8″40801204-bolt5/8″
3-1/2″40801208-bolt5/8″40801208-bolt5/8″
4″40801208-bolt5/8″40801208-bolt5/8″
5″601202008-bolt3/4″601202008-bolt3/4″
6″601202008-bolt3/4″601202008-bolt3/4″
8″601202008-bolt3/4″601202008-bolt3/4″
10″9519032012-bolt7/8″9519032012-bolt7/8″
12″9519032012-bolt7/8″9519032012-bolt7/8″
14″14729449012-bolt1″14729449012-bolt1″
16″14729449016-bolt1″14729449016-bolt1″
18″21342671016-bolt1-1/8″21342671016-bolt1-1/8″
20″21342671020-bolt1-1/8″21342671020-bolt1-1/8″
24″3006001,00020-bolt1-1/4″3006001,00020-bolt1-1/4″

CLASS 300 FLANGE

Stud bolt torque chart for ASME B16.5 FF and RF class 300 flanges

Flange SizeB16.5 Class 300 RF/ Ring Gaskets
Torque / Round (ft-lbs)Stud Bolts Tighten Sequence*
1st2ndFinalDwg/No.Stud Bolts Size
1/2″1020304-bolt1/2″
3/4″1530504-bolt5/8″
1″2142704-bolt5/8″
1-1/4″30601004-bolt5/8″
1-1/2″45901504-bolt3/4″
2″33661108-bolt5/8″
2-1/2″42841408-bolt3/4″
3″601202008-bolt3/4″
3-1/2″601202008-bolt3/4″
4″601202008-bolt3/4″
5″601202008-bolt3/4″
6″6012020012-bolt3/4″
8″9519032012-bolt7/8″
10″14729449016-bolt1″
12″21342671016-bolt1-1/8″
14″19539065020-bolt1-1/8″
16″27354691020-bolt1-1/4″
18″3006001,00024-bolt1-1/4″
20″3006001,00024-bolt1-1/4″
24″4659301,55024-bolt1-1/2″

Stud bolt tightening sequence:
Stud Bolt Tightening Sequence

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