GB 12 Cup Head Square Neck Bolts
Product: GB 12 Cup Head Square Neck Bolts
Property Class:4.6,4.8,5.6,5.8,8.8,10.9,12.9,A2-70, A4-70,A4-80
Finish:Zinc Plating（Yellow Zinc, Zinc Blue, Rinse Color), Black, Phosphate & Oil, Zinc Phosphate, Hot-dip Galvanized(HDG),Dacromet, Geomet
Material:Steel
Export country: USA, Japan, Australia, Europe and so on
Support customer customization
Carriage bolt is a type of fastener consisting of a head and a screw .Carriage bolts are divided into large semi-round head carriage bolts and small semi-round head carriage bolts according to the head size. Carriage bolt is a type of fastener consisting of a head and a screw .
Pictures
Product drawing
Product Specification
Size | 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 |
min | 11.3 | 15.3 | 19.16 | 23.16 | 27.16 | 31 | 39 | |
ds | max | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
min | 5.35 | 7.19 | 9.03 | 10.86 | 12.7 | 14.7 | 18.38 | |
k | max | 4.08 | 5.28 | 6.48 | 8.9 | 9.9 | 10.9 | 13.1 |
min | 3.2 | 4.4 | 5.6 | 7.55 | 8.55 | 9.55 | 11.45 | |
k1 | min | 3.6 | 4.6 | 5.6 | 7.55 | 8.55 | 9.55 | 11.45 |
max | 4.4 | 5.4 | 6.4 | 8.45 | 9.45 | 10.45 | 12.55 | |
s | max | 6.3 | 8.36 | 10.36 | 12.43 | 14.43 | 16.43 | 20.82 |
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 | |
Support customer customization | ||||||||
Some introduction about our company
Application
Our products are widely used in mechanical, electrical, automotive, building construction, railways, bridges, steamships, fire protection and communication system, etc.
Workshop
Certification
Through scientific management, Jinan Star Fastener Co., Ltd. has obtained the 2015 version of ISO9001 quality management system certification. In 2017, the laboratory passed the national CNAS certification. In 2018, the company passed the European CE certification.
Testing Equipment
Our company has a specialized laboratory with digital hardness testers, microscopes, universal testing machines, axial force meters, hydrogen embrittlement detection devices, magnetic particle flaw detectors, metallographic analyzers, carbon and sulfur analyzers and salt spray testing machines, etc. Experimental testing equipment is used to conduct comprehensive testing of the chemical composition of raw materials, product hardness, mechanical properties, coating thickness and corrosion resistance to ensure that all products meet standard requirements and satisfy customers.
Production equipment
Our company has more than 300 production equipment.The product production process includes: Annealing, shot blasting, cold heading, thread rolling, heat treatment, galvanizing, finished product testing, packaging, etc. are all completed in the company.
Packing
Our service:
1.Product production: The primary service of bolt manufacturers is the production of various types of bolt products. For example, steel structure bolts, anchor bolts, high-strength bolts, etc. These products are widely used in construction, machinery, transportation and other fields. Manufacturers will produce according to customer needs and in accordance with national standards or industry standards.
2. We provide high-quality services to ensure that products can be safely and efficiently transported from the manufacturer to your required destination, and comply with relevant international trade regulations and standards.
3. Our company will also negotiate with customers on price, delivery date and other contract terms to ensure that the interests of both parties are protected.
4.Cost-effectiveness: Wide selection of parts, supplied by professional factories, and competitive prices.
5.Customized services: In addition to standard products, bolt manufacturers can also provide customized services. According to the special needs of customers, such as specific size, material, performance, etc., manufacturers can customize and produce bolt products that meet the requirements.
FAQ
1.How do you control your quality?
We require QC to inspect every production link of each batch of goods. We can provide you with MTC and factory certificate after the goods are completed.
2. Do you accept small orders?
Of course, we can accept any order, and we keep large stocks of all products.
3. Please send catalog?
If you need a catalog, you can leave your email to us and we will send the catalog within 2 working hours.
Submitted successfully
We will contact you as soon as possible