Size
Brass
Threaded fasteners
Fasteners
Threaded components
Aircraft components
Designations
Protective coatings
Dimensions
Hexagonal-head fasteners
Internal-thread fasteners
Nuts
Unified screw threads
Air transport engineering
Link: BS 3A 210:2019 Aerospace series. Nuts, hexagonal, ordinary and thin, Unified threads (below .250 inch) in brass, tin plated. Specification
Source: BSI Standards