Product Overview

Application Scenarios

Wing nuts (DIN 315), also called butterfly nuts, have two upright wings that let them be threaded on and off quickly by hand with no tool. They are the standard choice wherever a fastening must be adjusted, opened or removed often — machine guards and covers, filter housings, battery terminals, electrical panels, HVAC access panels, test rigs, furniture, sports and camping equipment. The American-form wings give a firm finger grip; stainless A2 / A4 versions suit damp, outdoor and food-contact use, and the low clamp force keeps them best for light-duty, frequently-serviced joints rather than structural loads.

Installation Notes

Run the wing nut down by hand until the wings meet the surface, then nip it up firmly with finger-and-thumb pressure on the wings — no wrench is needed or wanted, as heavy tooling can bend the wings. Use a flat washer under the nut to spread the load and protect the surface, and a spring washer where mild vibration is present. Wing nuts give a modest clamp force by design, so use them for covers, guards and adjustable joints rather than high-load structural connections, and choose stainless or plated finishes for wet or outdoor use.

Material & Certification

Cold-forged from austenitic stainless steel — A2 (AISI 304) or A4 (AISI 316) — to DIN 315, with wing span and thread gauge-checked and every batch traceable to raw material certificates. Each lot passes dimensional inspection before packaging; EN 10204 3.1 material certificates are available on request.