JIS B 8363 4-Bolt Flange
For JIS B 8363 4-Bolt Flange, governing standard is JIS B 8363; region of origin is Japanese Connections; thread type (tapered or parallel) is flange bolts; seat or flare angle is flat surface; seal method is The male connector has a flanged head with a groove for seating an O-ring and either a captive flange or split flange with bolt holes to correspond to the port. The seal is made where the O-ring is compressed between the flanged head and the flat surface of the port. The connection is held by threaded bolts, recorded from its source on 2026-08-13.
- Connection type
- JIS B 8363 4-Bolt Flange verified
- Governing standard
- JIS B 8363 verified
- Region of origin
- Japanese Connections our reading
- Thread type (tapered or parallel)
- flange bolts
- Seat or flare angle
- flat surface verified
- Seal method
- The male connector has a flanged head with a groove for seating an O-ring and either a captive flange or split flange with bolt holes to correspond to the port. The seal is made where the O-ring is compressed between the flanged head and the flat surface of the port. The connection is held by threaded bolts. verified
- Interchangeability notes
- Excluding bolt sizes, SAE J518, JIS B 8363, ISO/DIS 6162 and DIN 20066 are interchangeable.
Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.
What the source says
JIS B 8363 4-Bolt Flange connections are frequently used in fluid power systems. There are two pressure ratings for JIS B 8363 4-Bolt Flange fittings: Type I Code 61 is the standard series 4-Bolt Flange Type II Code 62 is the 6000 PSI series Each design concept is the same, yet the flanged head diameters and bolt hole spacing are larger for the Type II 6000 PSI connection. Metric and inch bolts are each used with these connectors. The male connector has a flanged head with a groove for seating an O-ring and either a captive flange or split flange with bolt holes to correspond to the port. The female port of the fitting is a smooth, un-threaded port with four bolt holes set in a rectangular pattern in around the port. The seal is made where the O-ring is compressed between the flanged head and the flat surface of the port. The connection is held by threaded bolts.
— brennaninc.com, retrieved 2026-08-13
Source
- brennaninc.comhttps://brennaninc.com/connection-types/