7/24/2019 Standard for Bolt Size and Length (2)

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0   SGG MTM ASU 27/05/2011

Title:

Doc No:

Flange

Size

Flange

Size

Bolt

Diameter 

No. of 

Bolt

Thread Machine

Bolt Length

Stud Bolt

Length

Stud Bolt

Length for

Wafer Type

Butterfly

Valve

(Category A)

Stud Bolt

Length for

Wafer Type

NRV (Short

Pattern)

Stud Bolt

Length for

Wafer Type

NRV (Long

Pattern)

(NPS) (DN) (in.) (mm) (mm) (mm) (mm) (mm)

½" 15 1/2" 4 UNC 65 75 - - -

¾" 20 1/2" 4 UNC 65 80 - - -

1" 25 1/2" 4 UNC 70 85 - - -

1¼" 32 1/2" 4 UNC 75 85 - - -

1½" 40 1/2" 4 UNC 75 90 - - -

2" 50 5/8" 4 UNC 85 100 150 125 170

2½" 65 5/8" 4 UNC 90 110 165 135 185

3" 80 5/8" 4 UNC 95 110 165 135 190

3½" 90 5/8" 8 UNC 95 110 - - -

4" 100 5/8" 8 UNC 95 110 170 135 190

5" 125 3/4" 8 UNC 100 120 185 - -

 PRAJ INDUSTRIES LTD.

Standard For Bolt Size and Length

STD - 4 - P - XXXX

Machine and Stud Bolt for Flanges Class 150

6" 150 3/4" 8 UNC 105 120 185 145 225

8" 200 3/4" 8 UNC 110 130 200 165 265

10" 250 7/8" 12 UNC 125 145 220 180 300

12" 300 7/8" 12 UNC 125 150 235 195 340

14" 350 1" 12 UNC 140 160 245 210 350

16" 400 1" 16 UNC 140 165 275 225 365

18" 450 1 1/8" 16 8UN 150 180 300 250 390

20" 500 1 1/8" 20 8UN 165 190 325 260 415

24" 600 1 1/4" 20 8UN 175 205 365 - 435

26" 650 1 1/4" 24 8UN - 235 - - -

28" 700 1 1/4" 28 8UN - 240 420 - -

30" 750 1 1/4" 28 8UN - 250 425 - 565

32" 800 1 1/2" 28 8UN - 280 480 - -

34" 850 1 1/2" 32 8UN - 280 - - -

36" 900 1 1/2" 32 8UN - 300 510 - 675

38" 950 1 1/2" 32 8UN - 290 - - -

40" 1000 1 1/2" 36 8UN - 300 - - -

42" 1050 1 1/2" 36 8UN - 310 570 - 750

44" 1100 1 1/2" 40 8UN - 320 - - -

46" 1150 1 1/2" 40 8UN - 320 - - -

48" 1200 1 1/2" 44 8UN - 335 620 - 865

Note:   For detailed Bolt Length Calculations please refer Document No: STD - 4 - P - XXXX

7/24/2019 Standard for Bolt Size and Length (2)

http://slidepdf.com/reader/full/standard-for-bolt-size-and-length-2 2/2

REV. NO. PRE. BY CHK. BY APP. BY DATE

0   SGG MTM ASU 27/05/2011

Title:

Doc No:

Flange

Size

Flange

Size

Bolt

Diameter 

No. of 

Bolt

Thread M/C Bolt

Length

Stud Bolt

Length

Stud Bolt

Length for

Wafer Type

Butterfly

Valve

(Category B)

Stud Bolt

Length for

Wafer Type

NRV (Short

Pattern)

Stud Bolt

Length for

Wafer Type

NRV (Long

Pattern)

(NPS) (DN) (in.) (mm) (mm) (mm) (mm) (mm)

½" 15 1/2" 4 UNC 70 80 - - -

¾" 20 5/8" 4 UNC 80 95 - - -

1" 25 5/8" 4 UNC 80 100 - - -

1¼" 32 5/8" 4 UNC 85 100 - - -

1½" 40 3/4" 4 UNC 95 110 - - -

2" 50 5/8" 8 UNC 90 105 - 130 175

2½" 65 3/4" 8 UNC 105 120 - 145 195

3" 80 3/4" 8 UNC 110 130 185 155 210

3½" 90 3/4" 8 UNC 110 130 - - -

4" 100 3/4" 8 UNC 115 135 195 160 215

5" 125 3/4" 8 UNC 125 140 - - -

Standard For Bolt Size and Length

STD - 4 - P - XXXX

Machine and Stud Bolt for Flanges Class 300

 PRAJ INDUSTRIES LTD.

8" 200 7/8" 12 UNC 145 165 245 200 300

10" 250 1" 16 UNC 165 185 275 230 340

12" 300 1 1/8" 16 8UN 175 200 300 260 390

14" 350 1 1/8" 20 8UN 180 205 330 265 435

16" 400 1 1/4" 20 8UN 190 220 360 280 460

18" 450 1 1/4" 24 8UN 195 225 380 310 495

20" 500 1 1/4" 24 8UN 210 235 400 325 535

24" 600 1 1/2" 24 8UN 235 270 460 - 595

26" 650 1 5/8" 28 8UN - 290 - - -

28" 700 1 5/8" 28 8UN - 305 - - -

30" 750 1 3/4" 28 8UN - 320 - - 695

32" 800 1 7/8" 28 8UN - 340 - - -

34" 850 1 7/8" 28 8UN - 345 - - -

36" 900 2" 32 8UN - 365 - - 855

38" 950 1 1/2" 32 8UN - 330 - - -

40" 1000 1 5/8" 32 8UN - 355 - - -

42" 1050 1 5/8" 32 8UN - 365 - - 940

44" 1100 1 3/4" 32 8UN - 380 - - -

46" 1150 1 7/8" 28 8UN - 395 - - -

48" 1200 1 7/8" 32 8UN - 405 - - 1040

Note:   For detailed Bolt Length Calculations please refer Document No: STD - 4 - P - XXXX