GB9074.13 Carbon Steel Grade 8.8 Blue-White Zinc Phillips Hex Socket Combination Screw with Flat and Spring Washer
The gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer is a high-performance pre-assembled fastening solution designed for efficient installation, vibration resistance, and stable mechanical locking. As a multifunctional industrial fastener, the gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer integrates a screw, flat washer, and spring washer into a single unit, significantly improving assembly efficiency and reducing part loss.
In modern industrial systems, the gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer is widely used in machinery, electrical equipment, automation devices, and OEM production lines. Compared with standard hex head bolt or individual stainless steel fasteners, this combination design ensures consistent preload, anti-loosening performance, and faster assembly operations.
Product Overview
The gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer is manufactured according to GB9074.13 standards, ensuring dimensional consistency and reliable mechanical performance. Made from high-strength carbon steel and heat-treated to grade 8.8, it delivers excellent tensile strength and durability.
The blue-white zinc surface treatment provides corrosion resistance and a clean industrial appearance, making the gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer suitable for general industrial environments.
As part of OEM fasteners and assembly efficiency solutions, this combination screw is widely used where speed, reliability, and anti-loosening performance are required.
Product Specifications
| Item | Specification |
|---|---|
| Standard | gb9074.13 |
| Product Name | gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer |
| Material | carbon steel |
| Strength Grade | 8.8 |
| Thread Type | metric coarse thread |
| Head Type | hex socket head with combination washer |
| Drive Type | phillips + hex socket (combination drive type) |
| Washer Type | flat washer + spring washer integrated |
| Diameter Range | m3 – m16 |
| Length Range | 6 mm – 80 mm |
| Surface Finish | blue-white zinc plated |
| Thread Direction | right hand |
| Packaging | box / bulk / oem packaging |
| Customization | available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥ 800 mpa |
| Yield Strength | ≥ 640 mpa |
| Hardness | 22–32 hrc |
| Density | 7.85 g/cm³ |
| Corrosion Resistance | good (zinc coating protection) |
| Operating Temperature | -50°c to 150°c |
| Vibration Resistance | high (spring washer effect) |
| Manufacturing Standard | gb9074.13 / iso equivalent |
Materials and Manufacturing Process
The gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer is produced through a controlled industrial process to ensure consistent quality and assembly reliability.
- raw material selection: medium carbon steel wire rod
- cold heading: forming screw head and shaft
- thread rolling: precision metric threading
- heat treatment: quenching and tempering to grade 8.8
- washer assembly: flat washer + spring washer integration
- surface preparation: cleaning and activation
- blue-white zinc plating: corrosion protection layer
- passivation: improves coating durability
- inspection: dimensional and torque testing
- packaging: pre-assembled export packaging
This process ensures stable performance for industrial fasteners used in high-efficiency assembly systems.
Applications of the Product
The gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer is widely used across multiple industries:
- electrical equipment: control cabinets and enclosures
- machinery manufacturing: equipment assembly systems
- automotive industry: interior and auxiliary components
- industrial automation: modular equipment structures
- home appliances: internal structural fastening
- construction equipment: general assembly systems
- OEM production lines: high-speed assembly operations
- communication equipment: device housing fastening
Its integrated design makes it more efficient than separate DIN931 bolt + washer combinations.
Why Choose This Product
- pre-assembled design improves installation efficiency
- grade 8.8 high-strength carbon steel material
- integrated flat and spring washer prevents loosening
- blue-white zinc corrosion protection
- stable torque and preload performance
- suitable for automated assembly lines
- reduces part loss and assembly time
- OEM bulk production support
- cost-effective fastening solution
Why Choose Flybear
Flybear is a professional manufacturer specializing in industrial fastening systems.
- advanced cold heading and assembly production lines
- strict ISO-based quality control system
- strong OEM customization capability
- stable mass production capacity
- global export experience
- engineering technical support
Flybear provides reliable industrial fasteners and complete fastening solutions for global industries.
Quality Inspection and Control
Each gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer undergoes strict inspection:
- chemical composition analysis
- tensile strength testing
- hardness testing
- torque performance testing
- washer assembly integrity testing
- coating thickness measurement
- corrosion resistance testing
- dimensional inspection
- packaging quality inspection
All processes comply with ISO quality management standards.
Selection Guide
When selecting a gb9074.13 carbon steel grade 8.8 blue-white zinc phillips hex socket combination screw with flat and spring washer, consider:
- required load and torque level
- vibration and loosening risk
- environmental corrosion conditions
- assembly automation requirements
- diameter and length specifications
- washer preload requirements
Proper selection ensures stable and efficient fastening performance.
FAQ
1. what is gb9074.13 combination screw?
it is a pre-assembled screw with flat washer and spring washer for faster installation.
2. what is grade 8.8?
it is a medium-high strength carbon steel grade for structural fastening.
3. why use combination screws?
they improve assembly efficiency and reduce missing parts.
4. is zinc plating corrosion resistant?
yes, it provides protection in general industrial environments.
5. can custom sizes be produced?
yes, flybear supports oem customization based on requirements.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
For quotation, customization, and technical support, please Contact Us.
