Premium Quality Steel Bolts for Construction and Engineering Projects

• Customization: Available
• Material: High Strength Steel
• Type: Hexagon Head
• Model NO.: GC-LS55
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, GB, JIS, BSW, GOST
• Grade: 8.8
• Application: Building
• Finish: Hot Galvanizing
• Other Materials: Stainless Steel
• Tooth Angle: Metric and Imperial
• Rod Features: Full and Half Thread
• Strength Level: 4.8 to 12.9
• Length: Customizable
• Diameter: Customizable
• Transport Package: Ocean Freight
• Specification: 50*30*20
• Trademark: GoChain
• Origin: China
• HS Code: 73181510
• Production Capacity: 500000000
• Package Size: 50.00cm * 50.00cm * 50.00cm
• Package Gross Weight: 500.000kg

Product Description

Product Description

Bolts, nuts and flat washers are common mechanical fasteners:

Bolts: threaded fasteners that pass through the connected parts and are usually used with nuts.

Nuts: internal threaded parts that work with bolts to apply pressure to fix the connection.

Flat washers: flat annular gaskets that disperse pressure to prevent bolts/nuts from scratching the workpiece or loosening.

They work together to ensure that the structure is stable, loose-proof and load-resistant.

Detailed Photos

Mechanical properties
Strength grade:

Carbon steel bolts: 4.8, 8.8, 10.9, 12.9, etc.

Stainless steel bolts: A2-70, A4-80, etc.

Tensile strength (e.g. 8.8-grade bolt tensile strength ≥ 800MPa).

Yield strength (e.g. 8.8-grade bolt yield strength ≥ 640MPa).

Hardness: such as HRC, HV, etc. (e.g. 10.9-grade bolt hardness 32~39HRC).

Surface treatment:
Galvanizing (white zinc, colored zinc),
Nickel plating, blackening,
Hot-dip galvanizing, phosphating, etc.

Types:
Hexagon head bolts,
Hexagon socket bolts,
Square head bolts,
Countersunk bolts,
Round head bolts, etc.

Functional properties
Anti-loosening performance: such as nylon insert anti-loosening bolts, double nut anti-loosening, etc.

Corrosion resistance: stainless steel, plating, etc. affect corrosion resistance.

High temperature/low temperature resistance: material and surface treatment determine the applicable temperature range.

Application scenarios
General fields: mechanical equipment, construction, automobiles, electronics, etc.

Special fields: aerospace (high strength, high temperature resistance), chemical industry (corrosion resistance), electricity (insulation), etc.

 

Product Parameters

Here is a concise table listing the key parameters of nuts in English:

Parameter	Details
Type	Hex nut (ISO 4032), flange nut, nylon lock nut, cap nut, wing nut, etc.
Thread Size	Metric (e.g., M6, M8), imperial (e.g., 1/4"-20), fine/coarse thread
Material	Carbon steel (Grade 4/8), stainless steel (A2-70/A4-80), brass, titanium
Strength Grade	Carbon steel: 4/5/6/8/10; Stainless steel: A2-70/A4-80
Width Across Flats (S)	Standard size (e.g., M6=10mm, M8=13mm)
Height (H)	Standard (e.g., M6≈5mm), thick (e.g., M6≈6.5mm)
Surface Finish	Zinc-plated (white/yellow), nickel-plated, black oxide, Dacromet, plain
Locking Feature	Non-locking, nylon insert (self-locking), metal lock, serrated flange
Standard	ISO 4032, DIN 934, ANSI/ASME B18.2.2, GB/T 6170
Temperature Range	Varies by material (e.g., stainless steel: -200°C~800°C, nylon: ≤120°C)

Example (M8 Hex Nut)

• Type: Hex nut (ISO 4032)

• Thread: M8 (pitch 1.25mm)

• Material: Carbon steel (Grade 8)

• Width (S): 13mm

• Height (H): 6.5mm

• Finish: Zinc-plated

Let me know if you need additional details or specific standards!

Company Profile

Yantai Guocheng Metal Co., Ltd. was established in 2017. Yantai Gechuan Metal Co., Ltd. is focused on producing quality metal products and components. As a well-known company in the field of metal processing and manufacturing, we utilize cutting-edge tools and deep expertise. Located in Shandong Province, our strategic location ensures the proximity that is critical to business growth, just two hours away from Qingdao and adjacent to major highways. Our engineering team excels in designing and manufacturing steel structures. Skilled mechanical welding and strict adherence to strict industrial standards reflect our commitment to excellent quality control.
 

 

Certifications

On the path of striving for excellence, Yantai Guocheng Metal Products Co., Ltd. has always demanded itself with strict standards and has passed the Environmental Management System Certification, Quality Management System Certification, and Occupational Health and Safety Management System Certification. These certifications are not only a high recognition of our past efforts but also a solid guarantee for the company's development.
 

 

FAQ

 

1.Q: What information do you need for quotation?
A: To expedite the quotation process, please provide the following details during your inquiry.
1) Comprehensive drawings (STEP, CAD, PROE, DXF and PDF formats)
2) Material specifications (aluminum, steel, iron, copper, etc.)
3) Surface treatment preference (anodizing, powder coating, sandblasting, electroplating, polishing, brushing)
4) Quantity (per order/monthly/yearly)
5) Do you have special requirements or requests such as packaging, labeling, delivery, etc.? Please tell us your needs to ensure that your expectations are met with precision and detail.

2.Q: What should we do if there are no drawings?
A: No worries, just send us the sample with a sketch specifying the thickness, length, height and width. Our expert engineering team will make a detailed CAD or 3D file for you to ensure a seamless process.

3.Q: How do we ensure quality?
A: Samples are pre-produced before mass production and must be final inspected before shipment

4.Q: What can you buy from us?
A: Sheet metal parts, steel structural parts, precision machined parts, special metal parts, etc. can all be customized.