8.8 Grade GB70 Black Zinc Fully Threaded Hex Socket Head Cap Screw

• Customization: Available
• Material: Carbon Steel
• Type: Hexagon Head
• Model NO.: Hex Socket Head Cap Screw
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW, GOST
• Grade: 8.8
• Application: Machinery, Chemical Industry, Environmental, Building
• Finish: Black
• Product Name: Hexagon Socket Bolts
• Keywords: Bolts Fastener
• Material-01: Carbon Steel / Alloy Steel / Stainless Steel
• Material-02: Aluminum Alloy
• Coating: Plain / Zinc Plated / Dacromet / HDG
• Surface: Black
• Packaging: Plastic Bag / Paper Box
• Nominal Diameter (D): M6 - M30
• Pitch (P): 1 - 3.5
• Head Thickness: 4 -15 mm
• MOQ: 10000PCS
• Sample: Accept
• OEM & ODM Custom: Accept
• Logo Custom: Accept
• Transport Package: Standard Shipping Packaging or Customized
• Specification: Standard Specifications Or Customized
• Trademark: YONGBIAO
• Origin: Zhejiang, China
• Production Capacity: 5000000 PCS/Year

Product Description

Product Description

Bolts Fastener

The Bolt is a mechanical element used to connect and fix parts. It consists of a cylindrical rod and a head with external threads. Bolts are used in combination with matching nuts or internally threaded holes. They use the interaction of threads and are installed by rotation to achieve the fastening of two or more parts. Bolts are extremely important in many engineering fields, and their applications involve many industries such as construction, machinery, automobiles, and aerospace. Bolts are made of:

Carbon Steel: suitable for ordinary conditions, low cost, and good load-bearing capacity. Heat treatment can be performed as needed to increase strength.

Alloy Steel: usually adds elements such as chromium, nickel, and molybdenum to improve strength and high-temperature resistance, and is mostly used in demanding working environments.

Stainless Steel: has good corrosion resistance and is suitable for humid or chemical environments.

It is often used in food, medical, marine, and other industries. Aluminum Alloy: Although it has low strength, it is light and corrosion-resistant, and is suitable for applications with weight requirements.

Product Parameters

 

Product Information
Brand	YONGBIAO Fastener
Name	Hexagon Socket Full Thread Bolt
Standard	National Standard
Material	8.8 Grade High Strength
Surface	Black
Packaging	Plastic Bag / Paper Box

 

Nominal Diameter d	Pitch   p	dk		k		s		t
		max	min	max	min	max	min	min
M6	1	10	9.78	4	3.82	4.02	4.12	2.88
M8	1.25	13	12.73	5	4.82	5.14	5.02	3.65
M10	1.5	16	15.73	6	5.82	7.175	7.025	4.35
M12	1.75	18	17.73	7	6.78	8.175	8.025	4.85
M14	2	21	20.67	8	7.78	10.17	10.025	5.15
M16	2	24	23.67	9	8.78	12.21	12.032	5.35
M20	2.5	30	29.67	11	10.73	14.21	14.032	7.32
M24	3	36	35.61	13	12.73	17.23	17.05	7.82
M30	3.5	45	44.6	15	14.8	22.27	22.065	8.82
The Above Data Is A Single Batch Of Manual Measurement Data, There Is A Certain Error, Please Be Careful If You Mind Unit: Mm

 

Specifications

Thread Nominal (M)

Nominal Length

M4-6	M4	6
M4-8	M4	8
M4-10	M4	10
M4-12	M4	12
M4-14	M4	14
M4-16	M4	16
M4-18	M4	18
M4-20	M4	20
M4-22	M4	22
M4-25	M4	25
M4-30	M4	30
M4-35	M4	35
M4-40	M4	40
M5-6	M5	6
M5-8	M5	8
M5-10	M5	10
M5-12	M5	12
M5-14	M5	14
M5-16	M5	16
M5-18	M5	18
M5-20	M5	20
M5-22	M5	22
M5-25	M5	25
M5-28	M5	28
M5-30	M5	30
M5-35	M5	35
M5-40	M5	40
M5-45	M5	45
M5-50	M5	50
M5-55	M5	55
M5-60	M5	60
M6-8	M6	8
M6-10	M6	10
M6-12	M6	12
M6-14	M6	14
M6-16	M6	16
M6-18	M6	18
M6-20	M6	20
M6-22	M6	22
M6-25	M6	25
M6-28	M6	28
M6-30	M6	30
M6-35	M6	35
M6-40	M6	40
M6-45	M6	45
M6-50	M6	50
M6-55	M6	55
M6-60	M6	60
M8-12	M8	12
M8-16	M8	16
M8-18	M8	18
M8-20	M8	20
M8-25	M8	25
M8-30	M8	30
M8-35	M8	35
M8-40	M8	40
M8-45	M8	45
M8-50	M8	50
M8-55	M8	55
M8-60	M8	60
M10-16	M10	16
M10-20	M10	20
M10-25	M10	25
M10-30	M10	30
M10-35	M10	35
M10-40	M10	40
M10-45	M10	45
M10-50	M10	50
M10-55	M10	55
M10-60	M10	60
M10-65	M10	65
M10-70	M10	70
M12-20	M12	20
M12-25	M12	25
M12-30	M12	30
M12-35	M12	35
M12-40	M12	40
M12-45	M12	45
M12-50	M12	50
M12-55	M12	55
M12-60	M12	60

 

Detailed Photos

Type of Bolt Material

Carbon steel: Suitable for ordinary conditions, low cost, good load-bearing capacity. Heat treatment can be performed as needed to improve strength.
Alloy steel: Usually elements such as chromium, nickel, and molybdenum are added to improve strength and high-temperature resistance, and are mostly used in demanding working environments.
Stainless steel: Has good corrosion resistance and is suitable for humid or chemical environments. It is often used in food, medical, marine, and other industries.
Aluminum alloy: It is lightweight and corrosion-resistant, and is suitable for applications where weight is required.

Processing Technology-01

Melting and casting: Select appropriate metal materials for melting and then cast into the basic shape of the bolt.
Cold forging or hot forging: To improve the density and strength of the material, the initial forming of the bolt is usually cold forging or hot forging.
Cutting: Includes mechanical processing processes such as turning and milling, which are used to form the shape of the screw, thread, and head.

Processing Technology-02

Heat treatment: Improve the mechanical properties of the bolt through quenching, tempering, etc., and improve its strength and durability.
Surface treatment: In order to improve corrosion resistance or appearance, the bolt is often galvanized, sprayed, or other surface treatment processes.

Production Process-01

Raw material preparation: Select appropriate metal materials, such as steel or alloy materials, and pass acceptance to ensure qualified quality.
Forming: Use forging and other processes to process metal materials into semi-finished products close to the shape of bolts.
Cutting: Perform precise turning and milling to form threads and other shapes.

Production Process-02

Heat treatment: Perform heat treatment to enhance performance according to material properties and bolt use.
Surface treatment: Perform galvanizing, spraying, or oiling to improve corrosion resistance.
Inspection and packaging: After strict quality inspection, qualified bolts are packaged and prepared for shipment.

Type of Bolts Shape

Hexagonal bolts: The most common shape, with a hexagonal head, is easy to install and remove with a wrench.
Round head bolts: The head is round and is usually used in places with high visual requirements.
Square head bolts: The head is square and suitable for installation in small spaces.
Special bolts: Such as bolts with anti-theft design, or customized bolts for specific purposes.

FAQ

Q1: Can you send me your product catalog and price list?
A: There is a corresponding parameter table under each of our products for your reference. Since we have thousands of products, it is difficult to send you all the product catalogs and price lists. Please tell us the styles you are interested in and we can provide a price list for your reference.

Q2: How is the quality of your products?
A: 100% inspection during production. Our products are certified by ISO9001, and TS16949 international quality standards.

Q3: What materials can you provide for your products?
A: Carbon steel, alloy steel, stainless steel, brass, copper, or as per your requirements.

Q4: What is your packaging?
A: Our normal packaging is plastic bags and paper boxes, we can also package the products according to your requirements.

Q5: How about the warranty?
A: We are very confident in our products, we pack them very well to ensure that the goods are well protected.