Qi Sheng lock nuts are used to help resist loosening under vibration and dynamic loads, improving joint reliability in machinery, automotive parts, and industrial equipment. Different locking designs are selected based on reusability, installation method, and performance requirements.
We can supply lock nuts in multiple thread standards and sizes, with material and finish options to match strength and corrosion needs. OEM and bulk orders are supported with specification-based sourcing.
Share your thread size, preferred lock type (if specified), material/grade, finish, and quantity for a quotation.

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DIN 935 Hexagon Slotted and Castle Nut
DIN 935 Hexagon Slotted and Castle Nut

DIN 935 Hexagon Slotted and Castle Nut

  1. Complies with ISO 8673, DIN 935, ANSI B18.2.2; high-reliability anti-loosening fasteners
  2. Material: Carbon steel (45#), alloy steel (42CrMo), stainless steel (304/316); strength grades 4.8–12.9
  3. Structure: Hexagonal body + top axial slots (3–6 slots) + internal coarse/fine thread
  4. Surface treatments: Zinc plating, black oxide, passivation, hot-dip galvanizing
  5. Size M5–M36 (matches bolts with cotter pin holes)
DIN6926 Hexagon Flange Nylon Lock Nut
High-quality DIN6926 nylon lock nut with flange for secure fastening.

DIN6926 Hexagon Flange Nylon Lock Nut

  1. Complies with ISO 10511, DIN 6926, ANSI B18.16.6; integrated anti-loosening & pressure-dispersing fasteners
  2. Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–10.9
  3. Structure: Hexagonal body + integral flange (with anti-slip serrations) + internal nylon insert + coarse/fine thread
  4. Surface treatments: Zinc plating, black oxide, passivation
  5. Size M2–M36 (matches standard bolts)
Keps Lock Nut with External Tooth Washer K Nut
Keps Lock Nut with External Tooth Washer K Nut

Keps Lock Nut with External Tooth Washer K Nut

  1. Integrated anti-loosening locking fasteners
  2. Material: Carbon steel (45#), stainless steel (304/316); strength grades 4.8–10.9
  3. Structure: Hexagonal body + one-piece external tooth washer (serrated) + internal coarse/fine thread
  4. Surface treatments: Zinc plating, black oxide, passivation
  5. Size M3–M24 (matches standard bolts)
Nylon Insert Lock Nut
Nylon Insert Lock Nut

Nylon Insert Lock Nut

  1. Complies with ISO 10511, DIN 985, ANSI B18.16.6; self-locking anti-loosening fasteners
  2. Material: Carbon steel (45#), stainless steel (304/316), brass; strength grades 4.8–10.9
  3. Structure: Hexagonal body + internal nylon insert (elastic) + coarse/fine internal thread
  4. Surface treatments: Zinc plating, black oxide, passivation
  5. Size M2–M36 (matches standard bolts)