BS 3SP 157-163:2019 Aerospace series. Rivets, solid, universal head, imperial diameters in metric units, aluminium alloys (colour coded) and nickel-copper alloy, cadmium plated or natural finish. Specification

Threadless fasteners
Protective coatings
Fasteners
Aircraft components
Length
Dimensions
Marking
Marks
Heat treatment
Symbols
Round-head fasteners
Designations
Aluminium alloys
Rivets
Colour codes

Link: BS 3SP 157-163:2019 Aerospace series. Rivets, solid, universal head, imperial diameters in metric units, aluminium alloys (colour coded) and nickel-copper alloy, cadmium plated or natural finish. Specification
Source: BSI Standards