Custom CNC 316L Stainless Steel Threaded Adapter Fitting Components
Product Overview
Custom CNC 316L Stainless Steel Threaded Adapter Fittings are manufactured for applications requiring dependable threaded connections, corrosion resistance, and controlled dimensional accuracy.
The component combines CNC turning, precision thread machining, and welding to create a compact connection component for customized mechanical and fluid‑handling assemblies.
316L stainless steel is frequently selected where resistance to corrosion, cleaning chemicals, moisture, or chloride‑containing environments is more important than using a lower‑cost stainless grade.
Product Specification
| Specification | Product Information |
|---|---|
| Product Name | Custom CNC 316L Stainless Steel Threaded Adapter Fitting |
| Material | Stainless Steel 316L |
| Material Grade | 316L / UNS S31603 |
| Primary Process | CNC Turning |
| Secondary Process | Thread Machining |
| Joining Process | Welding |
| Component Type | Threaded Adapter / Connector / Fitting |
| Geometry | Stepped Cylindrical Profile With Flanged Section |
| Internal Feature | Precision Bore |
| Thread Type | Customized According To Drawing |
| Thread Size | Customer Specified |
| Thread Standard | NPT / BSP / Metric / UN / Custom, According To Drawing |
| Dimensional Tolerance | Drawing‑Specified; Factory Capability Up To ±0.01 mm Where Applicable |
| Special Tolerance | Up To ±0.005 mm For Selected Features Where Applicable |
| Surface Roughness | Ra 0.1–3.2 μm Depending On Feature And Finish |
| Surface Finish | CNC Machined / Polished / Custom Finish |
| Welding | Custom Welded Construction According To Design |
| Inspection | Dimensional, Thread, Surface And Visual Inspection |
| Drawing Formats | STEP, STP, IGES, DWG, DXF, PDF |
| Production Volume | Prototype, Low Volume, Batch Production |
| MOQ | From 1 Piece For Custom Projects |
| Customization | CAD Drawing, Sample Or Engineering Specification |
| Application | Fluid Systems, Industrial Equipment, Machinery, Process Equipment |
Important: Thread size, pressure rating, weld specification, exact tolerance, and surface treatment should be confirmed against the customer's engineering drawing. PFTWORLD's published general CNC capability includes ±0.01 mm tolerance, ±0.005 mm special areas, Ra 0.1–3.2, 3/4/5/6‑axis machining, and MOQ from one piece.
6. Material Specification
316L Stainless Steel
316L is a low‑carbon austenitic stainless steel containing molybdenum, making it particularly useful where corrosion resistance is important.
Typical advantages include:
- Good Corrosion Resistance
- Strong Resistance To Chloride Exposure
- Good Weldability
- Good Surface Finishing Capability
- Suitable For Fluid‑Contact Components
- Suitable For Hygienic Applications
316L is widely used for pharmaceutical, food‑processing, marine, medical, chemical‑processing, and fluid‑system components.
7. Manufacturing Process
CNC Turning
CNC turning forms the primary cylindrical geometry, including:
- Outside Diameters
- Internal Bores
- Shoulders
- Grooves
- Threaded Sections
- Flange Profiles
Threaded components are commonly produced using CNC turning or related thread‑machining processes, with thread gauges and dimensional inspection used to verify critical features.
Thread Machining
Thread geometry is controlled according to the customer's specified:
- Thread Diameter
- Pitch
- Thread Form
- Thread Class
- Engagement Length
- Internal Or External Configuration
Welding
For welded constructions, the welding process joins the machined sections according to the approved design.
The welding requirement should specify:
- Weld Location
- Weld Type
- Weld Size
- Weld Appearance
- Post‑Weld Treatment
- Inspection Requirements
The low‑carbon characteristic of 316L makes it particularly suitable for welded assemblies where corrosion performance around the weld area is important.
8. Surface Finishing
Depending on the application, finishing can include:
CNC Machined Finish
For general industrial components.
Polished Finish
For applications requiring smoother surfaces and improved appearance.
Passivation
For corrosion‑sensitive applications where surface contamination control is important.
Electropolishing
For applications requiring a highly clean and smooth stainless‑steel surface.
316L suppliers commonly offer passivation and electropolishing for medical, food, marine, and corrosion‑critical applications.
9. Quality Control
Dimensional Inspection
Critical dimensions can be verified using:
- Micrometers
- Calipers
- Height Gauges
- CMM
- Precision Gauges
Thread Inspection
Critical threaded features can be checked using:
- Go/No‑Go Gauges
- Thread Plug Gauges
- Thread Ring Gauges
- Pitch Measurement
Surface Inspection
Inspection can include:
- Visual Inspection
- Surface Roughness Measurement
- Burr Inspection
- Weld Appearance Inspection
For fitting‑type stainless‑steel parts, thread accuracy and sealing surfaces are particularly important functional characteristics.
10. Typical Applications
Fluid Handling Equipment
- Fluid Connectors
- Tube Adapters
- Process Fittings
- Manifold Components
- Valve Assemblies
- Process Connections
- Fluid Transfer Components
- Sanitary Equipment
- Stainless Fluid Connections
- Processing Machinery
- Cleaning‑System Components
- Corrosion‑Resistant Connectors
- Instrument Connections
- Process Equipment
- Corrosion‑Resistant Fittings
- Fluid Connections
- Marine Hardware
Pharmaceutical Equipment
Food Processing Equipment
Chemical Processing
Marine Equipment
These application areas are consistent with published 316L machining use cases across pharmaceutical, food, marine, chemical, medical, and fluid‑processing equipment.
11. Buyer Pain Points → Solutions
| Buyer Concern | Manufacturing Response |
|---|---|
| Thread Does Not Fit | Drawing‑Based Thread Machining And Gauge Inspection |
| Corrosion Exposure | 316L Stainless Steel Selection |
| Leakage Risk | Controlled Thread And Sealing Features |
| Weld Distortion | Process‑Controlled Welding And Dimensional Verification |
| Poor Surface Finish | Controlled Machining And Optional Polishing |
| Small Production Quantity | Prototype And Low‑Volume Manufacturing |
| Difficult Custom Geometry | CNC Turning With Secondary Machining |
| Supplier Cannot Follow Drawings | CAD‑Based OEM Manufacturing |
About Us
Processing Material
Application
POSITIVE FEEDBACK
FAQ
1. Are you a manufacturer or a trading company?
We are a factory located in Shenzhen, China, with 20 years of rich experience, covering 6000 square meters. Complete facilities, including 3D quality inspection equipment, ERP system and 40 machines. If necessary, we can provide you with material certificates, sample quality inspection and other reports.
2. How to get a quote?
Detailed drawings (PDF/STEP/IGS/DWG...), including quality, delivery date, materials, quantity, surface treatment and other information.
3. Can I get a quotation without drawings? Can your engineering team draw for my creativity?
Of course, we are also glad to receive your samples, pictures or detailed size drafts for accurate quotation.
4. Can you provide samples before mass production?
Of course, the sample fee is necessary. If possible, it will be returned during mass production.
5. What is the delivery date?
Generally, the sample lasts for 1‑2 weeks and the batch production lasts for 3‑4 weeks.
6. How do you control quality?
(1) Material Inspection ‑ Check material surfaces and approximate dimensions.
(2) First inspection of production ‑ ensure critical dimensions in mass production.
(3) Sampling inspection ‑ check the quality before delivery to the warehouse.
(4) Preshipment inspection ‑ 100% inspection by QC assistant before shipment.
7. After‑sales service team
If you have any problems after receiving the product, you can provide feedback through voice call, video conference, email, etc. within one month. Our team will provide you with solutions within a week.
