304 Stainless Steel Flag Weld Hinge (Removable Pin, 3-6 Inch)

Welded flag hinge machined from 304 stainless steel for fire doors, steel doors and industrial enclosures where regular screws cannot hold. The flag design lets the door leaf lift off its frame for quick removal, making maintenance, cleaning and door replacement simple without removing the frame plate. Available in 3, 4, 5 and 6 inch sizes, the hinge welds directly to steel frames and door edges for a permanent, tamper-resistant fix. The smooth stainless surface resists rust in humid coastal and high-moisture settings, and the precise pin alignment keeps heavy doors swinging freely without sag. Popular with metal door fabricators, fire-door installers, equipment cabinet makers and hardware importers who supply commercial and industrial projects. Factory-direct supply supports bulk packing and custom size runs for distributors and OEM programs, and the weld-on format suits both new builds and retrofits of steel doors and gates.