DIN 908 Black Oxide A3 Carbon Steel Internal Threaded Plug

• Customization: Available
• Head Code: Round
• Connection: Female
• Model NO.: DIN 908 nternal Threaded Plug
• Material: ODM/OEM
• Technics: Casting
• Certification: ISO, ANSI, DIN, JIS, ASME, GB, BS, SH, HG, CE, CCS
• Special Function: High Voltage, Anti Corrosion, Good Elasticity, Low Value Steel
• Application: ODM/OEM
• Delivery Time: 4-40 Working Days
• Freight: Real-Time Quotation
• MOQ: Depends on The Size and Stock
• Logo: Customizable
• Transport Package: Carton
• Specification: ODM/OEM
• Trademark: ODM/OEM
• Origin: China
• Package Size: 35.00cm * 25.00cm * 15.00cm
• Package Gross Weight: 22.000kg

Product Description

The DIN 908 Black Oxide A3 Carbon Steel Internal Threaded Plug is designed for secure sealing of threaded holes in mechanical, hydraulic, and oil system applications.
Manufactured in accordance with DIN 908 standard, this internal hex plug ensures reliable sealing performance, easy installation, and stable quality for industrial use.

Made from A3 low-carbon steel with a black oxide finish, it offers a cost-effective and durable solution for oil sealing and hole blocking applications.
Standard sizes are available, and custom specifications are welcome to meet different industrial requirements.

 

Item	Description
Product Name	Internal Threaded Plug
Standard	DIN 908
Material	A3 Carbon Steel (Low Carbon Steel)
Surface Finish	Black Oxide
Drive Type	Internal Hex (Hex Socket)
Thread Type	Metric
Size Range	M8 – M52 (or as per requirement)
Sealing Type	With sealing washer
Application	Oil sealing, hydraulic systems, mechanical equipment
Manufacturing Process	Cold forging / CNC machining
OEM / ODM	Available

Applications

Oil drain and oil sealing systems

Hydraulic and pneumatic equipment

Automotive and engine components

Industrial machinery and gearboxes

This DIN 908 threaded plug is commonly used as an oil plug, blanking plug, or screw plug in demanding industrial environments.

Key Features & Benefits

Manufactured strictly according to DIN 908 standard

Internal hex design for easy and secure installation

Black oxide finish for basic corrosion resistance

Reliable sealing with sealing washer

Cost-effective alternative for industrial applications

Suitable for mass production and long-term supply

Why Choose Our Threaded Plugs

Consistent thread accuracy

Reliable sealing performance

Cost-effective alternative to imported parts

Strict quality control before shipment

Material & Surface Treatment

The plug is made of A3 carbon steel, equivalent to common low carbon steel grades, providing good machinability and stable mechanical properties.
The black oxide surface treatment improves corrosion resistance and gives a clean, professional appearance.

Customization & OEM Service

We support OEM and customized internal threaded plugs, including:

Custom sizes and tolerances

Alternative materials and surface treatments

Packaging and labeling options

Production based on customer drawings

Choose us, choose quality. Your reliable partner in fastening solutions.

Support the production and customization of various fasteners.
In Chinese, "Hongniu" means strength and excellence.
Our products live up to our name - high-quality fasteners that take your products to the next level.

Hongniu Fasteners

Business cooperation is based on honesty and trust.
We will do our utmost to be your reliable and long-term supplier, safeguarding the quality of your products.
Our relationship is not merely that of a buyer and a seller - we are partners who depend on each other to create both wealth and reputation.

Company Profile

About Hongniu Fasteners

Yangzhou Hongniu Import and Export Co., Ltd. is the foreign trade subsidiary of Jiangsu Hongding Automotive Parts Co., Ltd.
It was founded in June 2000 and is located in Tangzhuang Town Industrial Park, Gaoyou City, with convenient transportation.
The company covers an area of 35000 square meters and currently has over 300 employees, including 70 high-level and intermediate professional and technical personnel. Registered capital: 20 million yuan, total assets: 78 million yuan, and fixed assets: 56 million yuan. 
Main products: Various types of automotive parts and fasteners, castings and forgings, etc. 
Widely used in industries such as aerospace, machinery, wind power, textiles, automotive manufacturing, petroleum, forging, etc.
We have maintained cooperative relationships with dozens of large and medium-sized enterprises in China, and are highly valued by our customers due to our good reputation and excellent quality.

 

Why Choose Us 

1. 20+ Years Manufacturing Experience
2. ISO9001 Certified Factory
3. Support OEM / ODM & Custom Packaging
4. Fast Delivery and Competitive Price
5. Professional Export Team for the Europe, Australia, North and South America,etc.

Certifications

FAQ

Please feel free to talk more with us!

Q1: What is the minimum order quantity?
A1: Products in stock with no MOQ. If you need us to produce, the MOQ is 10,000pcs.
Q2: Can you provide a sample? 
A2: Sure, some samples are provided free of charge, but not including freight. 
Q3: How long is your delivery time? 
A3: Generally, it is 10-15 days if the products are in stock. or it is around 30 days to produce, and it is according to quantity. 
Q4: What is your payment method? 
A4:  T/T, 30% deposit in advance, balance payment before loading.  Order less than 5,000USD, 100% payment to reduce the bank charges. 
Q5: Can you customize the product according to the requirements of drawing sheets and so on? 
A5: Yes, please feel free to talk more details with us and send us the design drafts.