DIN 21547 Half-Thread Semi-Round Head Oval Neck Bolt M20 M24

• Customization: Available
• Material: ODM/OEM
• Type: Hexagon Head
• Model NO.: DIN21547
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW, GOST
• Grade: ODM/OEM
• Application: Machinery, Chemical Industry, Environmental, Building
• Finish: ODM/OEM
• Logo: Customizable
• Delivery Time: 4-40 Working Days
• Freight: Real-Time Quotation
• MOQ: Depends on The Size and Stock
• Transport Package: Carton
• Specification: ODM/OEM
• Trademark: ODM/OEM
• Origin: China
• HS Code: 3926901000
• Production Capacity: 1000tons/Month
• Package Size: 10.00cm * 5.00cm * 5.00cm
• Package Gross Weight: 0.500kg

Product Description

High-Quality Fastener for Reliable Industrial Applications
Our DIN 21547 half-thread bolts are precision-engineered to deliver superior strength, durability, and corrosion resistance. Ideal for heavy-duty machinery, automotive, and construction projects.

Applications

• Automotive assembly and repair

• Heavy machinery and equipment

• Construction and structural engineering

• Custom manufacturing projects

Parameter	Specification	Notes
Standard	DIN 21547	German Standard
Thread	Half-thread	Provides strong clamping without excess thread engagement
Head Type	Semi-Round	Smooth finish, easy to tighten
Neck Type	Oval	Reduces stress concentration
Material	Carbon Steel / Stainless Steel	Customizable on request
Surface Treatment	Zinc Plated / Black Oxide / Hot-dip Galvanized	Corrosion-resistant
Tensile Strength	8.8 / 10.9	According to material grade
Size Range	M6 - M20	Other sizes available on request
Application	Machinery, Automotive, Construction	Heavy-duty fastening solutions

• Standard: DIN 21547

• Thread Type: Half-thread

• Head Type: Semi-round

• Neck Type: Oval neck

• Material Options: Carbon Steel, Stainless Steel

• Surface Treatment: Zinc Plated, Black Oxide, Hot-dip Galvanized

• High Strength: Meets industry-grade mechanical requirements

• Precision Manufacturing: Ensures perfect fit and easy assembly

 

 

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.

Cooperative Partners

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.

 

Finish	Description
Natural / Plain	No surface treatment
Zinc Plated	Corrosion protection
Black Oxide	Industrial appearance
Painted	Custom colors available
Anodized	For aluminum rivets

Quality Control

• Incoming material inspection

• Dimensional inspection

• Tensile & shear strength testing

• Surface finish inspection

• Random sampling before shipment

Packaging & Delivery

Item	Details
Packaging	Small boxes / cartons / pallets
Custom Packaging	Available
MOQ	Negotiable
Delivery Time	15-30 days
OEM / ODM	Supported

Why Choose Us

• Professional fastener manufacturer & exporter

• Stable quality and competitive pricing

• Rich experience in DIN / ISO standards

• One-stop fastener supply service

• Fast response & technical support
  

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. 
Please feel free to talk more with Gianna about fasteners

 

 

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.