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GB807 Knurled Nuts 304 Stainless Steel Flat Nuts Hand-Tightened Thin Nuts Pan Nuts M3 M4 M5 M6 M8 M10
This GB807 standard knurled nut series is manufactured from 304 stainless steel with metric sizes from M3 to M10. The knurled outer surface enables hand-tightened operation without tools, while the thin-profile design suits applications with limited clearance. Material options include carbon steel, aluminum, titanium, brass, and copper, with various surface treatments available. CE, ISO9001, and ISO14001 certifications support quality and environmental management standards.
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Tool-Free Hand Tightening and Quick Adjustment: The knurled surface provides reliable grip for hand-tightened operation, enabling fast installation and removal without wrenches. This feature supports equipment adjustments during normal operation, reduces downtime during maintenance, and simplifies component changes in production environments. For applications requiring frequent access to adjustment points or routine inspection, the tool-free operation improves workflow efficiency. The knurling pattern also provides consistent grip under various handling conditions, supporting reliable tightening by operators.
Thin Profile for Space-Constrained Installations: The low-profile design provides practical advantages in applications with limited clearance. The reduced height allows these nuts to be used in areas where standard hex nuts would protrude or interfere with adjacent components. This thin construction also makes the nuts suitable for use as lock nuts, where the additional nut thickness is minimized to preserve thread engagement. The flat pan nut shape provides a clean, low-visibility appearance for equipment surfaces and visible assemblies where fastener profile is a design consideration.
Extensive Material and Surface Finish Selection: The range of available materials and finishes supports specification based on environmental and performance requirements. 304 stainless steel suits general corrosion-resistant applications. Brass and copper offer decorative finishes and electrical conductivity properties. Aluminum and titanium provide weight reduction for lightweight assemblies. The broad surface treatment options support aesthetic requirements, additional corrosion protection, and specific functional properties. This flexibility allows engineers to specify appropriate materials without redesigning standard components.
Certified Quality and Design Privacy Protection: The ISO9001:2015 certification provides documented quality management processes, supporting consistent product quality across production batches. The ISO14001:2015 certification indicates environmental management practices are in place. The CE marking confirms compliance with applicable European health, safety, and environmental protection standards. The availability of a confidentiality agreement protects customer design and specification information, which is particularly valued by original equipment manufacturers and engineering firms developing proprietary products.
Food and Medical-Grade Equipment Applications: In the food processing industry, these knurled nuts are used for securing covers, access panels, and inspection ports on processing equipment. The hand-tightened operation allows for quick opening and closing during cleaning procedures and inspection routines. The 304 stainless steel material supports washdown requirements and corrosion resistance to cleaning chemicals. Medical apparatus manufacturing specifies these nuts for equipment requiring frequent adjustments and where tool access may be limited. The hand-tightened design supports rapid configuration changes in clinical settings, while the material options support sterilization protocols. Packaging machinery incorporates these nuts for adjustment points on guides, forming stations, and sealing assemblies, where quick changeovers between product runs require efficient adjustment without specialized tools.
Industrial Automation and Production Line Components: Within the conveying equipment sector, these knurled nuts are used for securing sensor mounts, guard rails, and guide assemblies. The thin profile is particularly useful where clearance between the conveyor frame and adjacent equipment is limited. The hand-tightened feature supports rapid position adjustments during system setup and reconfiguration. The machinery for canning sector uses these nuts for quick-access covers on filling stations and seaming heads, enabling maintenance and cleaning procedures without tools. As machine parts, these knurled nuts serve as standard hardware for adjustment points on various industrial equipment types, supporting on-the-fly settings and routine service access.
Heavy Industry and Specialized Environment Equipment: In chemical equipment installations, material selection is informed by the specific chemical exposure conditions. The 304 stainless steel option provides corrosion resistance for many chemical environments. For more demanding conditions, alternative materials such as titanium or specific plating options can be specified. Ship manufacturing uses these nuts in marine equipment where hand-tightened operation and corrosion resistance are both considerations. The material range supports selection for saltwater exposure conditions. The water treatment industry applies these nuts in filtration equipment, pump stations, and chemical dosing systems, where moisture exposure is constant and where quick access for inspection and maintenance supports operational efficiency. The ability to select from various materials and surface treatments supports the specific environmental requirements of different water treatment applications. The certification status and design confidentiality provisions provide additional value for engineering specification in these critical infrastructure applications.
The GB807 Knurled Nut, also known as a flat nut, thin nut, or pan nut, is a specialized threaded fastener designed for applications requiring hand-tightened installation and removal without specialized tools. This product conforms to GB807, a Chinese national standard that specifies the dimensional and performance requirements for knurled nuts. The GB807 designation provides a documented reference for design consistency and interchangeability, supporting engineering specifications and procurement processes.
The defining feature of this product is the knurled outer surface. Knurling is a metalworking process that creates a patterned texture on the external circumference of the nut. This textured surface provides enhanced grip when the nut is turned by hand, enabling operators to tighten or loosen the fastener without wrenches or other tools. The hand-tightened operation is particularly valuable in applications where frequent adjustment or disassembly is required, or where tool access is limited. The knurling pattern is typically a diamond or straight-line configuration that increases friction between the operator's fingers and the nut surface.
The nut body features a thin, flat profile. This low-profile design is suitable for applications where standard-height nuts would exceed available clearance. The thin construction also provides a practical option for use as a locking nut, where it can be tightened against a standard nut to help maintain thread position. The flat pan nut shape offers a clean appearance for visible applications where the fastener is part of the finished product surface.
The material range for these nuts is extensive. The standard offering is 304 stainless steel, which provides a practical combination of mechanical properties and corrosion resistance. Alternative materials available include carbon steel, aluminum, titanium, brass, and copper. This material flexibility supports selection based on specific application requirements such as weight reduction, electrical conductivity, magnetic properties, or cost considerations. The surface treatment options are similarly diverse, including plain, polishing, passivation, black oxide, Dacromet, zinc-nickel alloy, gold plating, chromium plating, chemical nickel plating, black nickel plating, tin plating, silver plating, matte black, and bright black finishes.
The size range covers M3, M4, M5, M6, M8, and M10 metric thread diameters. This range addresses commonly specified fastening sizes for light to medium-duty industrial, electronic, and mechanical applications. The CE marking, ISO9001:2015 quality management certification, and ISO14001:2015 environmental management certification provide documented assurance of production standards. A confidentiality agreement is available to protect client design and specification information.
Material |
Corrosion Resistance |
Temperature Resistance |
Magnetic |
Carbon Steel |
Low |
-20°C to 300°C (-4°F to 572°F) |
Yes |
Alloy Steel |
Low to Medium |
-50°C to 450°C (-58°F to 842°F) |
Yes |
SS304 Stainless Steel |
Good |
-196°C to 800°C (-321°F to 1472°F) |
No |
SS316 Stainless Steel |
Excellent |
-196°C to 800°C (-321°F to 1472°F) |
No |
Brass |
Good |
-20°C to 200°C (-4°F to 392°F) |
No |
Aluminum Alloy |
Good |
-200°C to 150°C (-328°F to 302°F) |
No |
Titanium Alloy |
Excellent |
-200°C to 600°C (-328°F to 1112°F) |
No |
Specification | ||||
MATERIAL |
Aluminum,Brass,Hardened Metals,Stainless Steel,Steel Alloys |
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PROCESSING |
Cold Heading,Die Forging,Lathe,Turn-Mill Composite,CNC Machining,Sliding Headstock Lathe,Cylindrical Grinding,Gear Hobbing,Wire Cutting,Laser Welding,Tapping |
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Production Name: |
GB807 Knurled Nuts 304 Stainless Steel Flat Nuts Hand-Tightened Thin Nuts Pan Nuts M3 M4 M5 M6 M8 M10 |
Material: |
Carbon Steel, Stainless Steel, Aluminum, Titanium, Copper, Brass, or as your requirements |
Surface Treatment: |
Plain, Polishing, Passivation, Black, Dacromet, Zinc-nickel Alloy, Gold Plated, Chromium Plating, Chemical Nickel Plating, Black Nickel Plating, Tin Plating, Silver Plating, Matte Black, Bright Black, according to your requirement |
Technical Standard: |
All parameters can be customized according to your specific requirements for materials, processes, and performance indicators. |
Confidentiality Agreement: |
100% protection of client design privacy |
Certification: |
CE,ISO9001:2015,ISO14001:2015 |
Packaging : |
Standard Carton Or Plastic Tray, Sponge Tray, CardboardTray, etc. |
Can Be Customized According To CustomerRequirements. |
The versatility of the GB807 Knurled Nut makes it applicable across a broad range of industrial sectors. The following examples illustrate how this product is used in different operational environments:
