Semi-round Head Square Neck Bolts

As one of professional manufacturers in China, DONGSHAO would like to provide you Semi-round Head Square Neck Bolts. And we will offer you the best after-sale service and timely delivery.

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Product Description

DONGSHAO is a well-known supplier and manufacturer of semi-round head square neck bolts in China. Our semi-round head square neck bolts are characterized by their robustness, long service life, and easy installation.

Material Options:

Carbon Steel Semi-round Head Square Neck Bolts – Suitable for industrial applications, cost-effective

Stainless Steel Semi-round Head Square Neck Bolts – Corrosion resistant

Smooth Semi-round Head Square Neck Bolts – Exquisite appearance

Application Areas:

Construction and engineering projects

Mechanical equipment assembly

Automotive and transportation industry

Outdoor structures and facilities

Various engineering projects requiring both strength and aesthetics

Semi-round Head Square Neck Bolts Parameter

(mm)	M6	M8	M10	M12	M14	M16	M20
P	1	1.25	1.5	1.75	2	2	2.5
dk max	13.1	17.1	21.3	25.3	29.3	33.6	41.6
dk min	11.3	15.3	19.16	23.16	27.16	31	39
k1 max	4.4	5.4	6.4	8.45	9.45	10.45	12.55
k1 min	3.6	4.6	5.6	7.55	8.55	9.55	11.45
k max	4.08	5.28	6.48	8.9	9.9	10.9	13.1
k min	3.2	4.4	5.6	7.55	8.55	9.55	11.45
s max	6.3	8.36	10.36	12.43	14.43	16.43	20.52
s min	5.84	7.8	9.8	11.76	13.76	15.76	19.22
r min	0.5	0.5	0.5	0.8	0.8	1	1
ds max	6	8	10	12	14	16	20
ds min	5.35	7.19	9.03	10.86	12.70	14.70	18.38

Brand Strength

The company covers an area of approximately 10,000 square meters and has over 100 employees, including more than 20 engineering and technical personnel. It is a high-tech enterprise. Dongshao Company possesses advanced cold heading equipment, dozens of sets of professional hot stamping equipment, and the latest imported Taiwanese high-speed nut forming machines, demonstrating strong technical capabilities.

Main products include:

High-speed rail series bolts

Photovoltaic solar series bolts and accessories

Steel structure accessories, fasteners for infrastructure

Expansion anchoring series and hot-dip galvanized standard parts

Products can be customized according to customer drawings and requirements, and are widely used in construction, machinery, decoration, automotive, shipbuilding, rail transit, metallurgy, mining, and photovoltaic new energy industries.

Our Service – Service System

Pre-sales service: Introduction of product characteristics and advantages, providing technical advice and customized solutions

Sales service: Order processing, logistics tracking and delivery, ensuring smooth procurement

After-sales service: Providing maintenance, training and technical support to ensure long-term customer value

FAQ – Frequently Asked Questions

Q1: What materials are available for your semi-round head square neck bolts?

A1: We offer three materials: carbon steel, stainless steel, and smooth semi-round head, to meet the needs of different projects.

Q2: Can you customize special specifications or special surface treatments?

A2: Yes, according to customer drawings and requirements, we can process various non-standard and special parts and provide different surface treatment solutions.

Q3: Which industries are your products suitable for?

A3: Suitable for construction, machinery, decoration, automotive, rail transit, mining, and photovoltaic new energy industries.

Q4: Do you support export and bulk purchasing?

A4: We support domestic wholesale and international export, and have a stable supply capacity.

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