Professional Stainless Steel & Industrial Nuts Manufacturer
Ningbo Teng Qi Fasteners Co.,Ltd is a professional manufacturer and supplier of stainless steel and industrial nuts, specializing in the production of standard and custom nuts for global customers. With ISO9001 certified quality management and advanced manufacturing capabilities, we produce high-quality nuts according to international standards including DIN, ISO and ASME/ANSI specifications. Our products are widely used in machinery, automotive, construction, industrial equipment and other fastening applications. Our product range includes hex nuts, heavy hex nuts, structural nuts, castle nuts, flange nuts, nylon lock nuts, square nuts, T slot nuts, dome nuts, coupling nuts, wing nuts, weld nuts and other special customized nuts. We manufacture nuts from various materials including stainless steel 304, stainless steel 316, carbon steel, brass and aluminum through advanced cold heading, tapping and hot forging processes.
From raw material inspection to nut forming, threading, heat treatment and surface treatment, every production stage is strictly controlled to ensure stable quality and reliable performance. Equipped with cold heading machines, tapping machines and hot forging equipment, we are capable of producing nuts with accurate dimensions, precise threads and consistent mechanical properties. We also provide various surface treatments to meet different application requirements and deliver reliable fastening solutions to customers worldwide.
Types of Nuts
Industrial nuts are mechanical fasteners with internal threads designed to work together with bolts, screws or threaded rods to create secure and detachable connections. By tightening the nut onto a threaded fastener, a strong clamping force is generated to hold components together. Industrial nuts are widely used in machinery, construction, automotive, electrical equipment and various industrial applications where reliable fastening is required.
Industrial nuts are available in different designs, materials and specifications to meet various application requirements. Common types include hex nuts, heavy hex nuts, flange nuts, lock nuts, castle nuts, square nuts, T nuts, coupling nuts and customized nuts. Depending on the working environment and performance requirements, nuts can be manufactured from stainless steel, carbon steel, brass, aluminum and other materials with different surface treatments for improved corrosion resistance and durability.
Material option for Nuts:
We provide a wide range of material options for industrial nuts to meet different application requirements. As an experienced nut manufacturer, we are capable of producing standard and custom nuts from various metal materials, including stainless steel, carbon steel, aluminum and copper alloys. With advanced cold heading, hot forging and precision machining capabilities, we manufacture nuts with accurate dimensions, reliable thread performance and consistent quality according to customer specifications.
Stainless steel nuts, including SS304 and SS316, offer excellent corrosion resistance and durability for demanding environments. Carbon steel nuts provide high strength and cost-effective solutions for general industrial and heavy-duty applications. Aluminum nuts are lightweight and corrosion resistant, while copper and brass nuts provide excellent electrical conductivity and corrosion resistance for specialized applications. We can manufacture nuts in different materials, sizes and specifications according to drawings, samples or international standards.
| Material | Main Fertures | Typical Application |
|---|---|---|
| Stainless Steel 304 | Good corrosion resistance, excellent durability and suitable for general industrial environments. | Machinery, construction, automotive, outdoor equipment |
| Stainless Steel 316 | Superior corrosion resistance and excellent performance in marine and chemical environments. | Marine equipment, chemical processing, food equipment |
| Carbon Steel | High mechanical strength, good hardness and cost-effective performance. Suitable for high-load fastening. | Heavy machinery, construction, structural fastening |
| Copper / Brass | Excellent electrical conductivity, good corrosion resistance and good machining performance. | Electrical equipment, electronic components, precision applications |
| Aluminum | Lightweight, corrosion resistant and non-magnetic with good machinability. | Aerospace, electronics, lightweight equipment |
| Alloy Steel | High strength, high hardness and excellent fatigue resistance. Suitable for applications requiring superior mechanical performance under heavy loads. | Automotive, industrial machinery, high-strength fastening applications |
Industrial Nuts Manufacturing Process:
Our industrial nuts are manufactured through a complete production process, from raw material preparation to final surface treatment and quality inspection. With advanced cold heading machines, hot forging equipment, tapping machines and precision machining equipment, we are capable of producing standard and customized nuts with accurate dimensions, reliable thread performance and consistent quality.
Each manufacturing stage is strictly controlled to ensure that our nuts meet customer specifications and international standards. From material preparation, forming, threading, machining, heat treatment and surface finishing, we focus on process control and quality management to provide reliable fastening solutions for customers worldwide.
1. Raw Material Preparation and Wire Drawing
Raw materials are carefully selected according to product requirements, including stainless steel, carbon steel, aluminum and copper alloys. Wire drawing is performed to achieve the required diameter, surface condition and material consistency, preparing the material for further forming processes.
2. Cold Heading Process
Cold heading is one of our main manufacturing processes for producing standard nuts in high volume. This process forms the basic shape of nuts with high production efficiency and consistent dimensions while maintaining excellent material strength.
3. Hot Forging (Hot Heading)
For larger sizes or special nut designs, hot forging is used to improve formability and achieve the required shape. This process is suitable for heavy-duty nuts requiring higher strength and durability.
4. Tapping and Thread Processing
Precision tapping is performed to create accurate internal threads. We control thread dimensions and accuracy through professional equipment and thread inspection methods to ensure proper fitting with bolts.
5. CNC Turning and Machining
For special nuts, non-standard nuts and precision components, CNC turning and machining processes are used to achieve complex designs, special dimensions and tight tolerances according to customer drawings.
6. Heat Treatment
Heat treatment is applied when required to improve mechanical properties such as hardness, strength and durability. This process ensures that nuts can meet different load and performance requirements.
7. Surface Treatment
We provide various surface treatment options to improve corrosion resistance, appearance and service life, including:
* Zinc Plating * Hot Dip Galvanizing * Black Oxide * Nickel Plating * Dacromet Coating * Stainless Steel Passivation
Quality Control of Nuts:
Quality control is an essential part of our nut manufacturing process. As an ISO9001 certified nut manufacturer, we implement strict quality management procedures throughout the entire production process, from raw material inspection to final shipment. We carefully control each manufacturing stage, including material preparation, forming, threading, machining, heat treatment and surface treatment, to ensure that every nut meets customer specifications and international standards.
With professional inspection equipment and experienced quality control personnel, we perform comprehensive inspections on critical parameters such as material grade, dimensional accuracy, thread performance, mechanical strength and surface quality. Whether producing standard DIN, ISO, ASME/ANSI nuts or customized nuts according to drawings and samples, we are committed to providing reliable and consistent fastening solutions for customers worldwide.
| Inspection Item | QUality Control Method |
|---|---|
| Raw Material Inspection | Verify material grade, chemical composition and mechanical properties to ensure material consistency |
| Dimensional Inspection | Check nut width across flats, height, diameter and other critical dimensions according to drawings and standards |
| Thread Inspection | Use thread plug gauges and other inspection tools to verify internal thread size, pitch and fitting accuracy |
| Mechanical Testing | Perform hardness testing, Proof load performance checks when required |
| Heat Treatment Inspection | Verify hardness and mechanical properties after heat treatment processes |
| Surface Treatment Inspectio | Check coating thickness, surface appearance and corrosion resistance requirements |
Standard of Screws we produce
ASME/ANSI American Standard:
A194 Grade 2HM Heavy Hex Nuts A194 Grade 7M Heavy Hex Nuts A563 Heavy Hex Nuts A194 Grade 2H Heavy Hex Nuts A194 Grade 7 Heavy Hex Nuts
ANSI/ASME B18.2.2 Hex Nuts ASME B 18.16.6 Nylon Nuts ASME/ANSI B 18.2.2 Hex Thick Nuts ASME/ANSI B 18.2.2 Slotted Nuts ASME/ANSI B18.2.2 Hex Flange Nuts
DIN Germany Standard:
DIN985 Nylon Nuts DIN934 Hex Nut Stainless Steel DIN466 Knurled Nuts DIN6923 Hex Flange Nut DIN508 Nuts for T-slots DIN439 Chamfered Stainless Steel DIN7967 Self-Locking Counter Nuts DIN1587 Hex Domed Cap Nuts Acorn Nut DIN6330 1.5d Hex Thick Nuts DIN6334 Hex Coupling Nuts DIN6915 Steel Structural Hex Nuts DIN982 Nylon Nuts DIN981 Locknuts DIN986 Hex Domed Cap Nuts DIN980V Three-Point Locking Hexagon Nuts DIN928 Square Weld Nuts DIN935 Hexagon Slotted and Castle Nuts
EN Europe Standard:
EN14399-3 High-strength Structural Hex Nut Stainless Steel Single Leaf Spring T-Slot Sliding Nut Stainless Steel Roll-in T Slot Nut for 20 Series
GOST Russia Standard:
GOST 28919 Hex Nuts GOST 5915 Hex Nut GOST R 52645 Structural Hex Nuts
UNI Italt Standard:
UNI5587 Thick Hex Nuts UNI5588 Hex Nuts UNI5713 High-Strength Large Hexagon Nuts
AS Australian Standard:
AS1112.1 Hex Nuts AS/NZS 2451 Double Chamfer Hex nuts AS/NZS 2465 Australian Standard Hexagon Nuts AS1252 High Strength Hex Nuts