BS 3A 210:2019 pdf free.Aerospace series -Nuts, hexagonal, ordinary and thin, Unified threads (below .250 inch), brass, tin plated - Specification. 5 Material and manufacture 5.1 The nuts shall he machined from free machining leaded brass bar in accordance with BS EN 12163, BS EN 12164 or BS EN 12167 alloy CW614N-R430. NOTE BS249 and BS2874 have been withdrawn but...
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