Square Nut
Qi Sheng square nuts provide a larger bearing surface and can be easier to hold in place in certain assemblies compared with hex nuts. They are often used in maintenance, retrofit applications, and traditional fastening designs where alignment and holding during tightening are important.
We supply square nuts in multiple thread sizes with options for material, grade, and corrosion-resistant finishes. Bulk supply and specification-based sourcing are available for B2B buyers.
For quoting, share thread size, material/grade, finish, and quantity.
DIN315 Wing Nuts Butterfly Nut
- Complies with ISO 3161, DIN 315, ANSI B18.17; hand-operated quick-lock fasteners
- Material: Carbon steel, stainless steel (304), plastic, brass; strength grades 4.8–8.8
- Structure: Double wing-shaped head (for hand twisting) + internal coarse/fine thread
- Surface treatments: Zinc plating, black oxide, passivation
- Size M3–M16 (matches standard bolts)
DIN557 Square Nut
- Complies with ISO 8992, DIN 557, ANSI B18.2.2; universal anti-rotation locking fasteners
- Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–12.9
- Structure: Square profile + standard thickness + internal coarse/fine thread
- Surface treatments: Zinc plating, black oxide, passivation, hot-dip galvanizing
- Size M2–M36 (matches standard bolts)
DIN562 Square Thin Nut
- Complies with ISO 4036, DIN 562, ANSI B18.2.2; space-saving anti-rotation fasteners
- Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–10.9
- Structure: Square profile + thin thickness (1/2–2/3 of standard square nuts) + internal thread
- Surface treatments: Zinc plating, black oxide, passivation
- Size M2–M24 (matches standard bolts)
Rhombic Nut
- Space-saving anti-rotation fasteners
- Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–9
- Structure: Rhombic (diamond-shaped) profile + standard/thin thickness + internal coarse/fine thread
- Surface treatments: Zinc plating, black oxide, passivation;
- Size M2–M24 (matches standard bolts)
Square Cage Nut
- Sheet metal quick-install fasteners
- Material: Carbon steel, stainless steel (304), brass; strength grades 4.8–10.9
- Structure: Square outer cage + internal threaded insert + spring clip/claw (for clamping)
- Surface treatments: Zinc plating, passivation, black oxide
- Size M3–M12 (matches standard bolts), square size 8–20mm