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NXF UNS C28000/JIS C2800/H62/ISO CuZn40/CZ109 Diameter 1-100mm Grade 100-450HV Brass Fastener C28000 Brass Flat Washer
2026-11-02 15:58 NXF GROUP
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Products Description
C2800 Introduction
Brass is a versatile copper-zinc alloy series with comprehensive mechanical and physical properties, including excellent
electrical and thermal conductivity, structural strength, surface hardness, wear resistance, ductility and outstanding corrosion resistance. Brass materials feature rich and adjustable surface colors ranging from yellow, red, silver to golden tones, which are widely adopted by designers and architects to optimize interior and exterior decorative effects for architectural projects. UNS C28000 (C2800) is a high-quality standard yellow brass alloy within the brass material system. It inherits superior ductility and stable machinability, supporting precision stamping, bending, forging and pressing forming processes. With uniform material texture, bright polishing performance and reliable atmospheric and freshwater corrosion resistance, C2800 brass maintains stable mechanical performance and long service life under conventional working conditions. Widely applied in plumbing pipe fittings,press-fit pipeline components, architectural decorative hardware, instrumentation accessories, valve parts and general mechanical engineering components, UNS C28000 brass serves as a cost-effective and multi-functional alloy for industrial connection and architectural decoration scenarios
electrical and thermal conductivity, structural strength, surface hardness, wear resistance, ductility and outstanding corrosion resistance. Brass materials feature rich and adjustable surface colors ranging from yellow, red, silver to golden tones, which are widely adopted by designers and architects to optimize interior and exterior decorative effects for architectural projects. UNS C28000 (C2800) is a high-quality standard yellow brass alloy within the brass material system. It inherits superior ductility and stable machinability, supporting precision stamping, bending, forging and pressing forming processes. With uniform material texture, bright polishing performance and reliable atmospheric and freshwater corrosion resistance, C2800 brass maintains stable mechanical performance and long service life under conventional working conditions. Widely applied in plumbing pipe fittings,press-fit pipeline components, architectural decorative hardware, instrumentation accessories, valve parts and general mechanical engineering components, UNS C28000 brass serves as a cost-effective and multi-functional alloy for industrial connection and architectural decoration scenarios
C28000 Brass Flat Washer Introduction
C28000 Brass Flat Washer, also known as H62 plain brass washer, is a flat annular fastener made of UNS C28000 (60Cu-40Zn) brass. It is designed to distribute clamping load, protect the surface of connected parts, reduce loosening risk and compensate for gaps between bolted joints. C28000 brass delivers good mechanical strength, favorable corrosion resistance and superior thermal & electrical conductivity. It features great machinability, easy brazing and forming performance. Manufactured with precise stamping or CNC machining, this washer keeps flat surface and tight dimensional tolerance. It is widely used in electrical assemblies, plumbing fittings, marine hardware, mechanical equipment and general fastening systems. Various inner diameter, outer diameter and thickness sizes are available, and custom specifications can be supplied according to drawings.
C28000 Brass Flat Washer Drawing
C2800 Chemical Composition And Mechanical Properties
Factory and Product Pictures
C28000 Brass Flat Washer Product Pictures
C2800 PMI spectral testing proves
Video of a customer visiting us
Product processing
C28000 Brass Flat Washer Product Processing
1.Raw Material Inspection:
Adopt C28000 (CuZn40) brass coil / brass sheet as raw material. Verify the material certificate, chemical composition and mechanical properties. Conduct on-site spectrum analysis to confirm alloy composition conforms to C28000 standard. Check sheet thickness uniformity, and visually inspect the surface for scratches, oxidation spots, cracks, pits and folding defects. Unqualified materials will be segregated and returned; only qualified brass stock can enter the stamping procedure.
2.Stamping & Blanking:
4.Heat Treatment (Annealing):
5.Ultrasonic Cleaning & Surface Treatment:
6.Final Inspection & Packaging:
2.Stamping & Blanking:
Fix the calibrated high-precision stamping die on the high-speed punch press. Feed the qualified brass sheet or coil into the stamping station continuously. Complete one-step blanking and punching to form flat washer blanks, strictly controlling inner diameter, outer diameter and thickness tolerance according to DIN125 or customer drawing requirements. Adjust stamping speed and pressure properly to prevent workpiece deformation, warping and tearing. Regularly check die wear during mass production to guarantee dimensional consistency.
3.Deburring & Edge Finishing:
Collect stamped washer blanks and put them into the vibratory finishing machine with ceramic abrasive media for tumbling deburring. Remove sharp cutting burrs, flash and micro irregular edges generated in stamping. Control the tumbling time to avoid excessive material loss and size deviation. After tumbling, separate washers from abrasives through screening, and spot-check edge smoothness to ensure no sharp edges that may scratch mating surfaces during assembly.
4.Heat Treatment (Annealing):
For washers requiring high ductility, carry out low-temperature stress relief annealing. Place washers in the protective atmosphere furnace, heat to the specified temperature and hold for proper time to eliminate stamping residual stress, improve brass plasticity and avoid later deformation. Slow cooling is adopted to prevent surface discoloration. Random sampling for hardness test after annealing to meet the required hardness range.
5.Ultrasonic Cleaning & Surface Treatment:
Put the deburred washers into ultrasonic cleaning tank with alkaline degreasing agent to remove stamping oil, metal dust and dirt on the surface. Then rinse fully with clean water and dry with hot air to avoid water stains and brass oxidation. If required, anti-tarnish passivation treatment can be applied to form a thin protective film on the brass surface, slowing down surface discoloration and improving corrosion resistance. Full visual surface inspection is carried out after drying.
6.Final Inspection & Packaging:
Carry out batch inspection. Use micrometer and caliper to detect outer diameter, inner diameter and thickness; check flatness and surface condition one by one. Mark batch number, material grade and specification as required. Sort out defective products for rework or scrapping. Pack qualified C28000 brass flat washers into anti-static plastic bags, add desiccant to prevent oxidation, then put into cartons with shipping marks and labels for warehouse storage and 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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