Grade 12.9 black DIN 912 hexagon socket head cap screws

Grade 12.9 black DIN 912 hexagon socket head cap screws are high-strength fasteners manufactured from alloy steel, conforming to German Industrial Standard DIN 912 specifications. These screws undergo quenching and tempering heat treatment to achieve the 12.9 high-strength grade with excellent mechanical properties. The black oxide surface treatment creates a uniform black protective layer that provides both corrosion resistance and an attractive appearance. The hex socket drive design ensures efficient torque transmission and is ideal for installations in confined spaces.

Manufactured by Jinghong Fastener, the black DIN 912 hexagon socket head cap screws utilize mainstream production processes that balance cost-effectiveness with practical functionality. The products generally meet DIN 912 standard tolerance ranges and are suitable for regular application requirements. The black oxidation treatment employs established industrial techniques to provide basic rust prevention, though additional protection is recommended for extreme humidity or corrosive environments. Quality is managed through batch sampling, with most batches demonstrating consistent performance. Hex socket dimensions have proven compatible with standard hex keys in practical installations. As an established manufacturer specializing in standard fasteners, Jinghong offers products with competitive cost-performance ratios suitable for most industrial applications.

Our Strength

·  Direct from manufacturer to customer, On time delivery

·  Completely fastener products,offers one - stop shopping service.

·  High quality and competitive price, saving your cost.

·  Product complies with iso9001 and ts16949 certification

·  After shippment, we will offer the Material report and Test report.

Product Application

These high-strength screws are widely used in applications demanding extreme connection reliability. In machinery manufacturing, they secure high-stress components; in mold making, they fasten plates and cores; in automotive production, they assemble critical parts like engines and transmissions. Additionally, they serve important roles in wind power equipment, construction machinery, aerospace, and precision instruments, particularly in critical joints subjected to severe vibration, impact loads, or alternating stresses.

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Q: Are you trading company or manufacturer ?

A: We are factory

Q: How long is your delivery time?

A: Generally it is 2-5 days if the goods are in stock. or it takes around 20 days if the goods are not in stock, certainly,it is according to your quantity.

Q: Do u do Non-standard Fasteners,and How about the OEM/ODM?

A:Yes,we do Non-standard Fasteners,OEM/ODM as well,and we have 20 years more experience in this line.We have complete production line, R&D Center. Pre-sales and after-sales support. Let u no worries about the quality.

Q: Do you provide samples ? is it free or extra ?

A: Yes, we could offer the sample for free,but u need charge the freight at the first time.

Q:Do you sell little quantity,like few hundred and few thousand?

A: It depends on the stock. if we have ,that's ok. if not,it needs MOQ.