BS 6276:1987

Foreword
Committees responsible
Specification
1 Scope
2 Dimensions
3 Tolerances
4 Identification code
5 Marking of oval, square and rectangular flanges
6 Mating components
Appendices
A Non-preferred flanges and additional features
B Recommendations for the use of existing castings
C Examples of methods for sealing mounting flanges and
    their mating surfaces
Tables
1 Dimensions for oval mounting flanges
2 Dimensions for square mounting flanges
3 Dimensions for rectangular mounting flanges
4 Dimensions for polygonal and circular mounting
    flanges
5 Nominal shaft diameter relationship to spigot
    diameter for oval, square and rectangular flanges
6 Nominal shaft end diameters for polygonal and
    circular flanges
7 Metric involute spline shaft ends
8 Non-preferred dimensions for oval mounting flanges
9 Non-preferred dimensions for square mounting flanges
10 Non-preferred dimensions for rectangular mounting
    flanges
11 Nominal shaft diameter relationship to spigot
    diameter for non-preferred flanges
12 Relationship between standards for flange castings
13 'O'-rings which can be accommodated in flange
    spigots
Figures
1 Basic layout for oval mounting flanges
2 Basic layout for square mounting flanges
3 Basic layout for rectangular mounting flanges
4 Basic layout for polygonal and circular mounting
    flanges
5 Cylindrical shaft end with parallel key or with
    metric involute metric spline shaft
6 Conical shaft end with key and external thread
7 Basic layout for oval mounting flanges

Applies to positive displacement rotary hydraulic fluid power pump and motor mounting flanges and shaft ends. Four types of flanges are covered.