Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS 4087 PN14 525 470 12 M24 26
PN16 525 470 12 M24 26
PN21 550 495 16 M27 30
PN35 550 495 16 M27 30
AS 2129 Table C 525 470 12 M24 26
Table D 525 470 12 M24 26
Table E 525 470 12 M24 26
Table F 550 495 16 M27 30
Table H 550 495 16 M27 30
Table J 550 495 16 M30 33
ANSI B16.5 ANSI 150 533 476 12 1" (M24) 29
ANSI 300 584 514 20 1-1/8" (M27) 32
ANSI 600 603 527 20 1-3/8" (M36) 41
ANSI 900 641 559 20 1-1/2" (M42) 41
ANSI 1500 749 635 16 2-1/4" (M56) 60
ISO 7005 (DIN) PN6 490 445 12 M20 22
PN10 505 460 16 M20 22
PN16 520 470 16 M24 26
PN20 535 476 12 M27 35
PN25 555 490 16 M30 33
PN40 580 510 16 M33 36


400mm (16")

Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS 4087 PN14 580 521 12 M24 26
PN16 580 521 12 M24 26
PN21 610 552 20 M27 30
PN35 610 552 20 M27 30
AS 2129 Table C 580 521 12 M24 26
Table D 580 521 12 M24 26
Table E 580 521 12 M24 26
Table F 610 552 20 M27 30
Table H 610 552 20 M27 30
Table J 610 552 20 M30 33
ANSI B16.5 ANSI 150 597 540 16 1" (M24) 29
ANSI 300 648 572 20 1-1/4" (M30) 35
ANSI 600 686 603 20 1-1/2" (M36) 41
ANSI 900 705 616 20 1-5/8" (M42) 44
ANSI 1500 826 705 16 2-1/2" (M64) 67
ISO 7005 (DIN) PN6 540 495 16 M20 22
PN10 565 515 16 M24 26
PN16 580 525 16 M27 30
PN20 600 540 16 M27 29.5
PN25 620 550 16 M33 36
PN40 660 585 16 M36 39



450mm (18")

Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS 4087 PN14 Flange 640 584 12 M24 26
PN16 Flange 640 584 12 M24 26
PN21 Flange 675 610 20 M30 33
PN35 Flange 675 510 20 M30 33
AS 2129 Table C Flange 640 584 12 M24 26
Table D Flange 640 584 12 M24 26
Table E Flange 640 584 16 M24 26
Table F Flange 675 610 20 M30 33
Table H Flange 675 610 20 M30 33
Table J Flange 675 610 20 M33 36
ANSI B16.5 ANSI 150 Flange 635 578 16 1-1/8" (M27) 32
ANSI 300 Flange 711 629 24 1-1/4" (M30) 35
ANSI 600 Flange 743 654 20 1-5/8" (M42) 44
ANSI 900 Flange 787 686 20 1-7/8" (M48) 51
ANSI 1500 Flange 914 775 16 2-3/4" (M72) 73
ISO 7005 (DIN) PN6 Flange 595 550 16 M20 22
PN10 Flange 615 565 20 M24 26
PN16 Flange 640 585 20 M27 30
PN20 Flange 635 578 16 M30 32.5
PN25 Flange - - - - -
PN40 Flange - - - - -


500mm (20") 

Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS 4087 PN14 Flange 705 641 16 M24 26
PN16 Flange 705 641 16 M24 26
PN21 Flange 735 673 24 M30 33
PN35 Flange 735 673 24 M30 33
AS 2129 Table C Flange 705 641 16 M24 26
Table D Flange 705 641 16 M24 26
Table E Flange 705 641 16 M24 26
Table F Flange 735 673 24 M30 33
Table H Flange 735 673 24 M30 33
Table J Flange 735 673 24 M33 36
ANSI B16.5 ANSI 150 Flange 699 635 20 1-1/8" (M27) 32
ANSI 300 Flange 775 686 24 1-1/4" (M30) 35
ANSI 600 Flange 813 724 24 1-5/8" (M42) 44
ANSI 900 Flange 857 749 20 2" (M48) 54
ANSI 1500 Flange 984 832 16 3" (M80) 79
ISO 7005 (DIN) PN6 Flange 645 600 20 M20 22
PN10 Flange 670 620 20 M24 26
PN16 Flange 715 650 20 M30 33
PN20 Flange 700 635 20 M30 32.5
PN25 Flange - - - - -
PN40 Flange - - - - -

 

600mm (24")  

Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS 4087 PN14 Flanges 825 756 16 M27 30
PN16 Flanges 825 756 16 M27 30
PN21 Flanges 850 781 24 M33 36
PN35 Flanges 750 781 24 M33 36
AS 2129 Table C Flanges 825 756 16 M27 30
Table D Flanges 825 756 16 M27 30
Table E Flanges 825 756 16 M30 33
Table F Flanges 850 781 24 M33 36
Table H Flanges 850 781 24 M33 36
Table J Flanges 850 781 24 M36 39
ANSI B16.5 ANSI 150 Flanges 813 749 20 1-1/4" (M30) 35
ANSI 300 Flanges 914 813 24 1-1/2" (M36) 41
ANSI 600 Flanges 940 838 24 1-7/8" (M48) 51
ANSI 900 Flanges 1041 902 20 2-1/2" (M64) 67
ANSI 1500 Flanges 1168 991 16 3-1/2" (M90) 92
ISO 7005 (DIN) PN6 Flanges 755 705 20 M24 26
PN10 Flanges 780 725 20 M27 30
PN16 Flanges 840 770 20 M33 36
PN20 Flanges 815 749.5 20 M33 36
PN25 Flanges - - - - -
PN40 Flanges - - - - -