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NXF UNS S316/DIN1.4401/AISI 316/0Cr17Ni12Mo2 M2-M30 Grade 8-12.9 Diameter M3-20 Pan Head Hexagon Socket Head Screw Bolt
2026-09-11 18:44 NXF GROUP
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Product Description
Stainless Steel 316 Introduction
316 is chrome-nickel austenitic alloy. It also contains molybdenum which increases general corrosion resistance, improves resistance to pitting from chloride ion solutions, and provides increased strength at high temperatures.316 also provide excellent fabricability and formability. It is also called Marine Grade Stainless Steel.
316 Pan Head Hexagon Socket Head Screw Bolt Introduction
Pan Head Hexagon Socket Head Screw Bolt is a high-precision countersunk fastening component widely used for flush mounting and concealed connection requirements. Featuring a pan countersunk head and internal hexagon drive structure, this screw can be fully embedded into the workpiece surface to achieve a pan, tidy and obstruction-free assembly effect. Compared with external hex fasteners, the socket drive provides higher torque transmission accuracy, stronger locking force and better anti-loosening performance during installation. Manufactured from premium carbon steel, alloy steel and stainless steel compliant with ISO, DIN and ASTM standards, flat head hexagon socket screws deliver high hardness, excellent tensile strength and stable fatigue resistance. They are extensively applied in precision machinery, electronic equipment, automotive parts, mold manufacturing and industrial assembly, especially suitable for limited-space installation and flat-surface fastening scenarios.
316 Pan Head Hexagon Socket Head Screw Bolt Drawing
316 Chemical Composition And Mechanical Properties
Factory and Product Pictures
316 Pan Head Hexagon Socket Head Screw Bolt Product Pictures
316 PMI spectral testing proves
Video of a customer visiting us
Product processing
316 Pan Head Hexagon Socket Head Screw Bolt Product Processing
1.Raw Material Inspection & Blanking:
Adopt high-quality carbon steel, alloy steel and stainless steel wire rods that comply with ISO, DIN and ASTM industrial standards. Strictly inspect the chemical composition, mechanical properties, surface smoothness and internal metallographic structure to eliminate cracks, inclusions, oxide scales and surface defects. Qualified raw materials are precisely cut into fixed-length blanks according to screw specifications, providing standardized raw materials for subsequent cold forming processing.
2.Surface Pretreatment & Cold Heading Forming:
2.Surface Pretreatment & Cold Heading Forming:
Conduct professional surface pretreatment including degreasing, pickling and phosphating to optimize surface lubrication and forming performance. Adopt multi-station precision cold heading technology to complete one-time integral forming of countersunk flat head, inner hexagonal socket and screw rod. The cold forming process ensures continuous metal fiber flow, compact internal structure and high dimensional accuracy, effectively improving the structural strength and assembly conformity of the screw.
3.Trimming, Shaping & Heat Treatment:
3.Trimming, Shaping & Heat Treatment:
Remove tiny burrs and residual flashes on the countersunk surface, inner hex hole and rod body. Carry out fine shaping to ensure flatness of the countersunk head and standard size of the hexagonal socket.Implement targeted heat treatment including quenching and tempering for high-strength screws and stress relief annealing for stainless steel products, eliminating cold forming residual stress and stabilizing hardness, toughness and fatigue resistance.
4.Precision Thread Rolling:
4.Precision Thread Rolling:
Adopt high-precision thread rolling process to form standard full-section threads. Strictly control thread pitch, tooth profile and tolerance grade in accordance with international standards. The rolling forming mode creates dense and smooth thread teeth with high meshing accuracy, ensuring stable locking performance, uniform stress bearing and reliable anti-loosening effect during long-term assembly and vibration working conditions.
5.Surface Treatment & Quality Testing:
5.Surface Treatment & Quality Testing:
Perform customized surface treatments such as electro-galvanizing, blackening, nickel plating and passivation to enhance corrosion resistance, oxidation resistance and surface finish. Conduct full-range professional inspections including dimensional tolerance detection, inner hex precision calibration, hardness testing, tensile strength test and nondestructive flaw detection to ensure all indicators meet precision fastener industry standards.
6.Marking, Packaging & Warehousing:
Mark qualified flat head hexagon socket screws with strength grade, specification, execution standard and production batch. Complete automatic sorting and counting, and adopt dust-proof, moisture-proof and collision-proof standardized packaging. All finished products are classified and stored in warehouses and delivered after strict final inspection.
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:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
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
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:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled seriously. We Specialize in manufacturing about 21 years. We have professional testing department and testing equipment.
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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Phone
+8613917160311
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+8613917160311
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Email
info@nxf-group.com
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