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NXF UNS S316/DIN1.4401/AISI 316/0Cr17Ni12Mo2 Diameter M2-M30 Grade8-12.9 Length 2-200mm 316 Fastener Hex Socket Head Cap Screw
2026-10-09 19:42 NXF GROUP
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Products 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.
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 Fastener Hex Socket Head Cap Screw Introduction
316 Hex Socket Head Cap Screw is a high-precision stainless steel fastener manufactured from premium 316 stainless steel material.Featuring a cylindrical head and an internal hexagonal socket design, this screw is installed and tightened with an Allen wrench,allowing efficient operation in narrow, confined spaces where traditional wrenches cannot work. Its compact head structure enables flush mounting, making the overall assembly neat, stable and aesthetic.
Compared with ordinary 304 stainless steel, 316 stainless steel contains molybdenum element, which provides superior corrosion resistance, acid and alkali resistance, and excellent anti-rust performance in humid, marine and chemical environments. The product is produced in strict accordance with ISO 4762, DIN 912 and GB/T 70.1 standards, with precise thread tolerance, stable clamping force and reliable locking performance. Common surface treatments include natural pickling passivation and polishing to maintain the original metallic texture and anti-corrosion capability. It is widely used in marine equipment, chemical machinery,food processing equipment, medical devices and precision electronic installations, serving as a durable and high-reliability fastening solution for harsh working conditions.
Compared with ordinary 304 stainless steel, 316 stainless steel contains molybdenum element, which provides superior corrosion resistance, acid and alkali resistance, and excellent anti-rust performance in humid, marine and chemical environments. The product is produced in strict accordance with ISO 4762, DIN 912 and GB/T 70.1 standards, with precise thread tolerance, stable clamping force and reliable locking performance. Common surface treatments include natural pickling passivation and polishing to maintain the original metallic texture and anti-corrosion capability. It is widely used in marine equipment, chemical machinery,food processing equipment, medical devices and precision electronic installations, serving as a durable and high-reliability fastening solution for harsh working conditions.
316 Fastener Hex Socket Head Cap Screw Drawing
316 Chemical Composition And Mechanical Properties
Factory and Product Pictures
316 Fastener Hex Socket Head Cap Screw Product Pictures
316 PMI spectral testing proves
Video of a customer visiting us
Product processing
316 Fastener Hex Socket Head Cap Screw Product Processing
1.Raw Material Inspection & Blanking:
Adopt high-standard 316 stainless steel wire rods, complying with international fastener manufacturing specifications. Strictly inspect raw material surface smoothness, internal metallographic structure, tensile strength and corrosion resistance performance to eliminate raw materials with cracks, oxide spots, inclusions and dimensional defects. According to screw specifications and length standards, implement precise fixed-length blanking to ensure uniform blank size and consistent material foundation for subsequent cold forming processing.
2.Surface Pretreatment & Precision Cold Heading:
2.Surface Pretreatment & Precision Cold Heading:
Complete professional degreasing, cleaning and surface lubrication pretreatment to remove oil stains, dust and oxide layers on blank surfaces, reducing extrusion friction during cold working. Adopt multi-station precision cold heading process to complete integral forming of cylindrical head and internal hexagonal socket. Strictly control forming pressure and die precision to ensure standard inner hexagon depth, regular head outline and compact metal structure without deformation, collapse or micro cracks.
3.Deburring, Shaping & Thread Rolling:
3.Deburring, Shaping & Thread Rolling:
Thoroughly remove tiny burrs and sharp flashing generated during cold heading forming. Conduct fine shaping and calibration on screw head and rod body to optimize overall flatness and straightness. Adopt high-precision thread rolling technology to form standard, uniform and full-tooth external threads with smooth surface and accurate pitch, ensuring precise assembly matching and stable fastening performance with supporting nuts and threaded holes.
4.Stress Relief & Anti-Corrosion Passivation:
4.Stress Relief & Anti-Corrosion Passivation:
Implement professional stress relief treatment to fully eliminate residual internal stress produced by cold extrusion and thread rolling, stabilizing internal metal grain structure and improving structural fatigue resistance. Conduct dedicated surface passivation treatment for 316 stainless steel to form a dense and stable anti-corrosion protective film, effectively enhancing oxidation resistance, salt spray resistance and overall durability in humid and corrosive working environments.
5.Full-Range Dimensional & Performance Inspection:
5.Full-Range Dimensional & Performance Inspection:
Carry out comprehensive quality inspection covering key dimensional tolerance detection of screw length, head diameter, inner hexagon size and thread accuracy. Conduct sampling tests on hardness, tensile strength, thread fitting performance and salt spray corrosion resistance. Strictly screen defective products with dimensional deviation, thread damage, surface flaws and unqualified performance to ensure all finished products meet industrial fastener standards.
6.Sorting, Packaging & Standard Warehousing:
6.Sorting, Packaging & Standard Warehousing:
Automatically classify and count qualified 316 hex socket head cap screws by complete specifications and models. Adopt dust-proof, moisture-proof and anti-collision standardized packaging to protect thread teeth and smooth screw surface from scratch and deformation. Paste clear labels including material grade, specification, batch number and inspection information. All finished products are classified and stored in standardized warehouses and delivered after final quality verification.
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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