Product description：Zhuhai Jiali Hardware supplies high quality nut din934 (DIN934) with complete specifications, multiple materials and custom manufacturing. Fast delivery and competitive price.
Materials Used in Manufacturing
Alloy steels: 40Cr, 35K
Carbon steels: 45# steel, Q235 (A3 steel)
Stainless steel
Other materials (e.g., plastic-steel for specific scenarios)
Hardness Grades
4, 5, 6, 8, 10, and 12 grades
Core Definition
A nut is a fastener with internal threads, designed to mate with bolts for connecting mechanical components. It can also be used with studs to transmit motion or power in mechanical systems. As an essential component in all mechanical manufacturing processes, nuts fasten parts by screwing onto bolts or studs.
Classification of Nuts
Nuts are categorized by multiple criteria, including standards (regional specifications), materials, and thread sizes:
1. By Regional Standards
Common standards include Chinese (GB), British (BS), American (ANSI/ASME), and Japanese (JIS) standards.
2. By Material
Carbon steel nuts
High-strength alloy nuts
Stainless steel nuts
Plastic-steel nuts
3. By Product Attributes & Standards
Ordinary nuts
Non-standard nuts
Old GB standard nuts
New GB standard nuts
American standard nuts
British standard nuts
German standard (DIN) nuts
4. By Thread Size & Identification
Thread specifications vary by standard, and only nuts and screws/bolts of matching specifications can be used together:
Metric system (GB, DIN, JIS): Marked with "M" + number (e.g., M8, M16). For example, an M3-0.5 nut has an inner diameter of approximately 3mm, with a thread pitch (distance between two adjacent thread crests) of 0.5mm.
American standard: Marked with "#" + number or fractions (e.g., 8#, 10#, 1/4", 3/8"). American standard nuts can only mate with American standard external threads.
British standard: Marked with fractions (e.g., 1/8", 1/4", 3/8").
Detailed Nut Types & Corresponding Standards
Nut Type
Corresponding Chinese Standard (GB)
Square nut (Grade C)
GB 39-88
Hexagon nut (Grade C)
GB/T 41-2000
Thick hexagon nut
GB 56-88
Wing nut
GB 62-88
Ring nut
GB 63-88
Combined acorn nut
GB 802-88
Hexagon nut with spherical top
GB 804-88
Lock nut (clinch type)
GB 805-88
Knurled high nut
GB 806-88
Knurled thin nut
GB 807-88
Extra-thin fine-thread small hexagon nut
GB 808-88
Inserted round nut
GB 809-88
Small round nut
GB 810-88
Round nut
GB 812-88
Round nut with holes on end face
GB 815-88
Round nut with holes on side
GB 816-88
Slotted round nut
GB 817-88
Type 1 hexagon lock nut with non-metallic insert
GB/T 889.1-2000
Type 1 fine-thread hexagon lock nut with non-metallic insert
GB/T 889.2-2000
Acorn nut
GB 923-88
Type 1 hexagon nut
GB/T 6170-2000
Type 1 fine-thread hexagon nut
GB/T 6171-2000
Thin hexagon nut
GB/T 6172.1-2000
Thin hexagon lock nut with non-metallic insert
GB/T 6072.2-2000
Fine-thread thin hexagon nut
GB/T 6173-2000
Thin hexagon nut without chamfer
GB/T 6174-2000
Type 2 hexagon nut
GB/T 6175-2000
Type 2 fine-thread hexagon nut
GB/T 6176-2000
Hexagon flange nut
GB/T 6177.1-2000
Fine-thread hexagon flange nut
GB/T 6177.2-2000
Type 1 slotted hexagon nut (Grade A & B)
GB 6178-86
Type 1 slotted hexagon nut (Grade C)
GB 6179-86
Type 2 slotted hexagon nut (Grade A & B)
GB 6180-86
Thin slotted hexagon nut (Grade A & B)
GB 6181-86
Type 2 hexagon lock nut with non-metallic insert
GB/T 6182-2000
Hexagon flange lock nut with non-metallic insert
GB/T 6183.1-2000
Fine-thread hexagon flange lock nut with non-metallic insert
GB/T 6183.2-2000
Type 1 all-metal hexagon lock nut
GB/T 6184-2000
Type 2 all-metal hexagon lock nut
GB/T 6185.1-2000
Type 2 fine-thread all-metal hexagon lock nut
GB/T 6185.2-2000
Type 2 all-metal hexagon lock nut (Grade 9)
GB/T 6186-2000
All-metal hexagon flange lock nut
GB/T 6187.1-2000
Fine-thread all-metal hexagon flange lock nut
GB/T 6187.2-2000
Type 1 fine-thread slotted hexagon nut (Grade A & B)
GB 9457-88
Type 2 fine-thread slotted hexagon nut (Grade A & B)
GB 9458-88
Fine-thread thin slotted hexagon nut (Grade A & B)
GB 9459-88
Welded square nut
GB/T 13680-92
Welded hexagon nut
GB/T 13681-92
Flat head rivet nut
GB/T 17880.1-1999
Countersunk head rivet nut
GB/T 17880.2-1999
Small countersunk head rivet nut
GB/T 17880.3-1999
120° small countersunk head rivet nut
GB/T 17880.4-1999
Flat head hexagon rivet nut
GB/T 17880.5-1999
Hexagon nut for precision machinery
GB/T 18195-2000
Key Notes
Thread Compatibility: Nuts and bolts must match in thread standard (metric/American/British), nominal diameter, and pitch to ensure secure connection. Mismatched threads may cause assembly failure or looseness.
Standard Application: Chinese national standards (GB) are widely used in domestic machinery manufacturing; American (ASME) and German (DIN) standards are common in imported equipment or international projects.
Material Selection: Choose materials based on environmental conditions (e.g., stainless steel for corrosion-prone environments, high-strength alloys for heavy-load scenarios) and hardness grades based on load requirements.
