NXF UNS S31603 OD DN15-1200 Stainless Steel Hexagonal Bushing Casting Internal and External Thread Joint NPT BSP Female Thread

2026-07-14 15:03 NXF GROUP
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Product Description
316L Introduce
Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.
Grade 316L, the low carbon version of 316 and is immune from sensitization (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.
The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures.

316L Stainless Steel Hexagonal Bushing Introduce

Internal and external thread joints, commonly known as internal and external threads, are straight-through transfer fittings with internal threads on one end and external threads on the other. They are divided into two categories: equal diameter and variable diameter. They mainly realize the transfer and adaptation of pipeline thread specifications and interface types. They are widely used in plumbing, pneumatic, hydraulic, chemical, instrumentation and other piping systems. Products are commonly made of brass, 304/316 stainless steel, malleable steel, and forged carbon steel, and are suitable for different pressures and media: brass is mostly used for household water supply and drainage, and low-pressure gas; stainless steel is resistant to acid and alkali corrosion and is suitable for high-pressure working conditions in food and chemical industries; malleable steel and carbon steel are mostly used for fire protection, steam, oil and gas pipelines. Common threads include 55° parallel G thread, 55° tapered pipe R/Rc thread, 60° American standard NPT tapered thread and special metric M thread for pressure gauges. There are differences in the sealing methods of different threads. Tapered threads rely on thread surface sealing, and parallel threads need to be equipped with sealing gaskets to prevent leakage. There is a hexagonal clamping position in the middle of the joint, which facilitates the disassembly and assembly of the wrench. The integral molding is stable in pressure bearing and takes up little installation space.
Complying with national standards such as GB/T3287 and GB/T14383, the tapered thread can be wrapped with raw material tape to enhance sealing during installation. Only the hexagonal part is clamped during operation to avoid cracking of the thread slide wire. Compared with the split union, the integrated inner and outer wire has a simple structure and lower cost. It is suitable for fixed pipelines that do not require frequent disassembly. It is the most basic and most used transfer accessory in the pipeline system.
316L Stainless Steel Hexagonal Bushing Grawing
316L Chemical Composition and Mechanical Properties
Factory and Product Pictures
316L Stainless Steel Hexagonal Bushing Product Pictures
316L PMI spectral testing proves

Video of a customer visiting us



Product processing

316L Stainless Steel Hexagonal Bushing Product Processing

1. Raw material selection and cutting: Select high-quality forged brass rods or stainless steel rods, inspect the raw materials for any sand holes or cracks, cut the raw materials according to the product dimensions, remove the surface oil and oxide scale, ensure the uniformity of the material texture, and prepare for forging.

2. High-temperature forging and shaping: Heat the blank to the appropriate temperature, place it in the special hexagonal forging mold, and shape it by pressing with a forging machine. Forge the hexagonal shape and the main body blank at one time, making the overall structure dense, improving the product's pressure resistance, and avoiding cracking in the later stage.

3. Machining and cutting: After the forging piece cools down, clamp it on the CNC lathe, machine the end face and chamfer, control the length and outer diameter size of the workpiece, reserve the processing allowance for the thread, and control the external dimensions within the tolerance range.

4. Internal and external thread processing: Use special taps and threading equipment to process the internal and external threads respectively, strictly follow the standard pitch for processing, clean the thread chips, and ensure smooth thread engagement.

5. Surface treatment and inspection: Perform deburring and cleaning, polish the stainless steel, and passivate the brass for rust prevention. Then, inspect the thread accuracy, wall thickness one by one, conduct pressure testing, and eliminate defective products. Qualified products are cleaned, sorted, and packed.The overall process is strictly controlled at each step. After forging, the internal structure is tight, and the joint's pressure-bearing capacity is stronger, the sealing effect is reliable, and it is widely used in pipe connections.

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.
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 in 1980, 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."    
316L Stainless Steel Hexagonal Bushing 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




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