Keywords: Fasteners, Bolts, Nuts, ScrewsA fastener’s thread is its heart. Bolts and screws must have threads that precisely match those of the nuts or tapped holes they engage with. Common standards include UNC/UNF (Imperial) and metric threads. Mismatched threads can cause cross-threading, stripping, or a weak joint. Always verify thread pitch and diameter. For high-strength bolts in critical assemblies, thread quality and fit are especially scrutinized to achieve the designed preload.
