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NXF UNS S30400 ASTM 304/JIS 304/EN 1.4301 Grade 4-12 Diameter M1-110 Stainless Steel Fastener 304 Hexagonal Flange Nut
2026-11-04 16:20 NXF GROUP
1
Products Description
304 Introduction
Grade 304 stainless steel (UNS S30400, EN 1.4301, GB 06Cr19Ni10), commonly known as 18/8 stainless steel, is a widely used chromium‑nickel austenitic stainless steel and the base grade of the 300 series. It contains 18.0–20.0% chromium, 8.0–10.5% nickel and a maximum of 0.08% carbon, with iron as the balance. Chromium forms a self‑healing passive oxide film for corrosion resistance, while nickel stabilizes the austenitic structure and improves ductility, toughness and low‑temperature performance. In the annealed condition, it has a density of 7.93 g/cm³, minimum yield strength of 205 MPa, tensile strength of 520–750 MPa and elongation over 40%. It cannot be hardened by heat treatment; strength increases only by cold working, which may cause slight magnetism, a normal characteristic. It resists corrosion in air, fresh water, weak acids and alkalis and is easy to clean for sanitary use, but it is susceptible to pitting corrosion in chloride‑rich environments. When held at 425–850 ℃, it becomes sensitized and prone to intergranular corrosion. Solution annealing at 1010–1120 ℃ followed by rapid cooling restores its corrosion resistance. It has good formability and weldability yet relatively poor machinability.
This material is widely used in food equipment, kitchenware, pharmaceutical vessels, architectural decoration, heat exchangers, fasteners and cryogenic components, and is not recommended for service in seawater or strong reducing acids.
304 Hex Flange Nut Introduction
304 Hex Flange Nut is an all-in-one stainless steel fastener with serrated anti-slip teeth on the flange face. It combines
a hexagonal nut and a flange washer as one piece, which removes the need for separate plain washers during assembly. The serrated pattern on the flange improves friction significantly after tightening, providing stable anti-loosening performance against vibration. Manufactured from 304 stainless steel, it features excellent rust-proof property and good corrosion resistance, performing steadily in outdoor, humid and mild corrosive environments. The flange design expands the contact area, evenly distributes fastening pressure and protects the workpiece surface from damage. It can be installed easily with standard spanners or sockets, available in a full range of metric and imperial thread sizes. It is widely adopted in mechanical assembly, equipment frames, pipeline systems, automotive parts, solar brackets and metal construction fastening projects.
a hexagonal nut and a flange washer as one piece, which removes the need for separate plain washers during assembly. The serrated pattern on the flange improves friction significantly after tightening, providing stable anti-loosening performance against vibration. Manufactured from 304 stainless steel, it features excellent rust-proof property and good corrosion resistance, performing steadily in outdoor, humid and mild corrosive environments. The flange design expands the contact area, evenly distributes fastening pressure and protects the workpiece surface from damage. It can be installed easily with standard spanners or sockets, available in a full range of metric and imperial thread sizes. It is widely adopted in mechanical assembly, equipment frames, pipeline systems, automotive parts, solar brackets and metal construction fastening projects.
304 Hex Flange Nut Drawing
304 Chemical Composition And Mechanical Properties
Factory and Product Pictures
304 Hex Flange Nut Product Pictures
304 PMI spectral testing proves
Video of a customer visiting us
Product processing
304 Hex Flange Nut Product Processing
1.Raw Material Inspection:
We source certified 304 stainless steel wire rods. Upon incoming, we cross-check material test certificates, perform spectrometer composition analysis and hardness testing. Visual inspection is carried out to detect surface cracks, scratches, rust, segregation and other defects. Qualified wire rods go through precision wire drawing to reach the required blank diameter, followed by surface pickling and lubricant coating, to reduce friction and prevent die damage in the cold heading process.
2.Cold Heading Forming:
3.Thread Tapping:
4.Degreasing, Cleaning & Passivation:
5.Finished Product Inspection:
6.Packaging & Shipment:
2.Cold Heading Forming:
The prepared wire rod is fed into multi-station cold heading machine, cut into fixed-length cylindrical blanks. Under continuous stamping of customized moulds, the blank is upset and extruded step by step to form the hexagonal body, integrated flange base and serrated anti-slip knurling on the flange face. Critical dimensions including hex across flats, flange outer diameter, flange thickness and serration profile are monitored in real time to avoid deformation or incomplete tooth forming.
3.Thread Tapping:
Cold-formed nut blanks are conveyed to high-speed tapping equipment. Precision HSS taps machine internal threads following metric, UNC or UNF standard specifications. Coolant is continuously supplied to lower cutting temperature and reduce thread burrs. Operators use go and no-go thread gauges for 100% on-line sampling check, ensuring thread tolerance, pitch and thread engagement comply with standard requirements.
4.Degreasing, Cleaning & Passivation:
All blanks are sent to ultrasonic cleaning tanks to remove drawing lubricant, tapping oil, fine metal chips and residual burrs. After thorough rinsing and drying, stainless steel passivation treatment is performed. A uniform chromium-rich passive film forms on the surface, which significantly enhances anti-corrosion and salt spray performance of 304 material, while retaining the original bright stainless steel appearance.
5.Finished Product Inspection:
Multi-item sampling inspection is implemented. Inspection items cover overall dimensional measurement, thread assembly test, serration completeness, surface defect check, flatness of flange face. If required by customers, neutral salt spray test will be arranged to verify anti-rust performance. Unqualified products are sorted out separately for rework or scrapping.
6.Packaging & Shipment:
All qualified flange nuts are fully dried to avoid moisture residue. Products are packed into inner PE bags and outer export cartons as per customer packing standard. Each package is affixed with clear labels marked with part number, specification, material grade, batch number and quantity. After final stock audit, goods are arranged for delivery.
Our NXF GROUP advantage as follow
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Packing & Delivery
Packing
Delivery
Company Profile
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories.Established in1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management and Craftsmanship." Our advantage:3S Service(Small Quantity/Short Time/Special Material)
Certification
FAQ
1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
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