BS 3A 210:2019 Aerospace series. Nuts, hexagonal, ordinary and thin, Unified threads (below .250 inch) in brass, tin plated. Specification

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

BS ISO 6336-2:2019 Calculation of load capacity of spur and helical gears Calculation of surface durability (pitting)

Spur gears
Durability
Lubrication
Gear drives
Load capacity
Mechanical transmission systems
Helical gears
Stress analysis
Surface defects
Design calculations
Mathematical calculations
Formulae (mathematics)

Link: BS ISO 6336-2:2019 Calculation of load capacity of spur and helical gears Calculation of surface durability (pitting)
Source: BSI Standards

BS 7883:2019 Personal fall protection equipment. Anchor systems. System design, installation and inspection. Code of practice

Accident prevention
Safety anchorages
Installation
Industrial
Marking
Restraint systems (protective)
Inspection
Falling (accident)
Structural members
Safety lines
Safety harnesses
Instructions for use
Examination (quality assurance)
Safety devices
Design
Classification systems

Link: BS 7883:2019 Personal fall protection equipment. Anchor systems. System design, installation and inspection. Code of practice
Source: BSI Standards