Nuts & Washers

The Standard Hex Nut (standardized under ISO 4032, DIN 934, and ASME B18.2.2) is a 6-sided internal-threaded mechanical fastener. Paired with mating machine screws and structural bolts, it converts rotational tightening torque into axial clamping preload across industrial and architectural assemblies.

6 specs

The Nyloc Nut (Nylon-Insert Lock Nut / Prevailing Torque Nut, standardized under ISO 7040 and DIN 985) incorporates a non-threaded polymer nylon ring permanently captured in an upper crown collar. When threaded onto a bolt, the nylon insert deforms elastically around the bolt threads, generating high frictional prevailing torque that prevents vibrational back-off.

6 specs

The Flange Nut (standardized under DIN 6923 and ISO 4161) is a hexagonal nut featuring an integrated wide, circular washer-like flange base. Available in smooth and serrated locking variants, it distributes clamping pressure over a larger surface area and eliminates the need for separate flat washers in high-speed automotive and industrial assembly.

6 specs

The Wing Nut (Butterfly Nut, standardized under DIN 315 and ASME B18.6.9) features two large ergonomic metallic side projections ('wings') extending vertically from the central threaded boss. Designed for rapid, tool-free tightening and loosening by hand, it is the standard fastener on stage lighting C-clamps, drum set cymbal stands, and battery terminals.

6 specs

The Flat Washer (Plain Washer, standardized under ISO 7089, DIN 125, and ASME B18.21.1) is a flat annular metallic or polymer disc with a central clearance hole. Positioned under screw heads or nuts, it distributes clamping load across a wider surface area, prevents surface gouging during tightening, and bridges oversized holes.

6 specs

The Split Lock Washer (Helical Spring Washer, standardized under DIN 127 and ASME B18.21.1) is a split ring formed into a helical spring shape with trapezoidal or rectangular cross-sections. When compressed flat under a bolt head, it exerts continuous axial spring pressure to compensate for minor settling and prevent loosening under low-vibration loads.

5 specs

The Belleville Washer (Conical Disc Spring / Cupped Spring Washer, standardized under DIN 2093 and DIN 6796) is a conical annular spring disc invented by Julien Belleville in 1858. Engineered to deliver massive axial spring clamping force across microscopic deflection distances, it maintains bolted joint tension under extreme thermal expansion and dynamic vibration.

6 specs