What is the delivery time?

Delivery takes 20-30 days, depending on the order volume and season.

Can I visit the factory online?

Yes, we support online factory visits and video inspections before shipment.

What are the common applications?

These bolts are widely used in steel construction, machinery, and chemical industries.

DIN 7991 Flat Countersunk Head Grade 10.9 Black Alloy Steel Socket Bolts

Name: DIN 7991 Flat Countersunk Head Grade 10.9 Black Alloy Steel Socket Bolts
Brand: Tianjin Primo Technology Co., Ltd.
SKU: 1971604171

Tianjin, ChinaTianjin Primo Technology Co., Ltd.

US$0.05

1-49 kg

US$0.03

50-999 kg

US$0.02

1,000+ kg

Sample price:US$1.00/kg.Request sample

Product profile

Customization

Available

Material

Carbon Steel, Alloy Steel

Type

Flat Head,Countersunk Head

Connection

Common Bolt

Head Style

Counter Sunk Bolt

Standard

DIN, GB, GOST

Grade

4.8, 8.8, 10.9, 12.9

Application

Machinery, Chemical Industry, Environmental, Build

Finish

Black Oxide

Thread

Full Thread Half Thread

MOQ

1 Ton Each Size

Length

6mm to 20 mm

Customized

Thread Size

M3-M8

Product Standards

DIN 7991

Product

Socket Bolts,Countersunk Bolts, Socket Screws

Transport Package

Bulk in Bag or Box Package

Specification

12 mm

Trademark

Primo

Origin

China

HS Code

7318150000

Production Capacity

10000 T/ Year

Key features

High-Grade Steel Options: Available in Grade 4.8, 8.8, 10.9, and 12.9 for diverse strength requirements.

Customizable Dimensions: Lengths from 6mm to 20mm with full or half thread options available.

Versatile Surface Finish: Options include Black Oxide, Electric Galvanized, and Hot Dip Galvanized.

OEM/ODM Support: Accepts OEM and ODM services with customized packaging and logos.

Large Production Capacity: Annual capacity of 30,000 tons across three production bases.

Flexible MOQ: Low MOQ of 1 ton per size, with sample orders accepted.

Global Export Experience: 70% of products exported to over 20 countries including USA and Europe.

Strict Quality Control: High-quality raw materials with strict control for machinery and construction.

Company profile

Tianjin Primo Technology Co., Ltd.

Tianjin, China

Business Type: Manufacturer/Factory, Trading CompanyAverage Response Time: ≤9.42h

About Our Factory & Business Background

AddressTianjin, China

Average Lead TimePeak Season Lead Time: 1-3 months Off Season Lead Time: one month

Our Production Capability & Technical Expertise

Main ProductsScrews, Nails, Rivets, Staples, Bolt, Nut, Washer, Stamping Part

Our Industry Experience & Global Business Record

Main MarketsNorth America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe

Product Q&A

Q:What are the available material grades?

We offer Grade 4.8, 8.8, 10.9, and 12.9 to meet different strength standards.

Q:Is OEM and ODM service available?

Yes, we fully accept OEM and ODM requests, including custom packaging and logos.

Q:What is the minimum order quantity?

The MOQ is 1 ton for each size, and sample orders are also welcome.

Q:What surface finishes are offered?

We provide Black Oxide, Electric Galvanized, and Hot Dip Galvanized finishes.

Q:What are the payment terms?

We accept T/T, Western Union, Money Gram, Credit Card, Paypal, and L/C.

Send Inquiry

*To: