DN500 (20" NB) ASA300 RF BOSSED SLIP ON FLANGE CS A105N

Flange outside diameter: 774.7mm (O)
Flange thickness: 63.5mm (C)
Flange hub height: 95.2mm (Y)
Pitch Circle Diameter (PCD): 685.8mm (K)
Raised Face Height: 1.5mm (RF)
Bolt Holes: 24 off 35.0mm diameter
Bore Diameter: 513.0mm (B)
Material: Carbon Steel
Grade: A105N
Standards: ASME B16.5
Flange Face: Raised Face
Certification Available: 3.1 BS EN 10204 Material Certification

Alternative terminology:
Slip on Flange, Weld on, Carbon Steel, Raised Faced, ASA 300LB, SOB