DIN931 316 Stainless Steel Hex Head Bolt
The DIN931 316 stainless steel hex head bolt is a high-performance partially threaded fastening solution designed for structural connections, heavy-duty machinery, and corrosion-prone environments. As a core industrial fastener, the DIN931 316 stainless steel hex head bolt provides excellent tensile strength, stable preload performance, and long-term durability in demanding engineering applications.
In modern industrial systems, the DIN931 316 stainless steel hex head bolt is widely used in combination with stainless steel hex nut and other stainless steel fasteners to create strong, reusable bolted joints. Compared with full-thread DIN933 bolt, the DIN931 design features a shank section that improves shear strength, making it more suitable for structural load-bearing applications.
Product Overview
The DIN931 316 stainless steel hex head bolt is manufactured according to DIN931 standards, ensuring precise dimensional control, consistent threading, and reliable mechanical performance. Made from premium 316 stainless steel, it delivers outstanding resistance to corrosion, especially in marine, chemical, and high-humidity environments.
The partially threaded design of the DIN931 316 stainless steel hex head bolt provides superior shear resistance and better alignment in structural assemblies. This makes it a preferred choice for heavy machinery, construction steel structures, and OEM engineering systems.
As part of OEM fasteners and high-strength fastening systems, the DIN931 316 stainless steel hex head bolt ensures stable mechanical performance under dynamic and static loads.
Product Specifications
| Item | Specification |
|---|---|
| Standard | din931 |
| Product Name | din931 316 stainless steel hex head bolt |
| Material | 316 stainless steel |
| Thread Type | metric partial thread |
| Head Type | hex head |
| Drive Type | external hex |
| Diameter Range | m3 – m64 |
| Length Range | 10 mm – 300 mm |
| Surface Finish | natural stainless steel |
| Strength Grade | a4-70 / a4-80 |
| Thread Direction | right hand |
| Packaging | box / bulk / oem packaging |
| Customization | available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥ 600–800 mpa |
| Yield Strength | ≥ 300–600 mpa |
| Hardness | 80–110 hrb |
| Density | 8.0 g/cm³ |
| Corrosion Resistance | excellent (marine & chemical environments) |
| Operating Temperature | -60°c to 400°c |
| Thread Tolerance | iso metric class 6g |
| Manufacturing Standard | din931 / iso equivalent |
Materials and Manufacturing Process
The DIN931 316 stainless steel hex head bolt is produced through a precision-controlled manufacturing process to ensure high strength and reliability.
- raw material selection: premium 316 stainless steel wire rod
- cold heading: forming hex head structure
- shank forming: partial thread blank creation
- thread rolling: high-precision metric threading
- heat treatment: improves tensile strength and fatigue resistance
- surface finishing: corrosion-resistant natural finish
- cleaning process: removes oil and impurities
- inspection: dimensional and mechanical testing
- packaging: export-grade protective packaging
This process ensures consistent performance for industrial fasteners used in critical structural applications.
Applications of the Product
The DIN931 316 stainless steel hex head bolt is widely used across multiple industries:
- construction engineering: steel frame structures
- marine engineering: offshore platforms and shipbuilding
- petrochemical industry: corrosion-resistant equipment
- automotive systems: chassis and structural assemblies
- renewable energy: wind turbine and solar systems
- heavy machinery: load-bearing mechanical assemblies
- industrial equipment: structural fastening systems
- OEM manufacturing: precision engineered assemblies
- electrical infrastructure: outdoor installations
Its partial thread design makes it more suitable for structural shear loads than DIN933 bolt solutions.
Why Choose This Product
- high-quality 316 stainless steel material
- excellent resistance to seawater and chemicals
- superior shear strength due to partial thread design
- stable mechanical performance under heavy loads
- long service life in harsh environments
- compatible with standard metric fastening systems
- suitable for OEM bulk production
- reliable vibration resistance performance
- widely used in structural engineering systems
Why Choose Flybear
Flybear is a professional manufacturer specializing in high-quality industrial fastening systems.
- advanced cold heading and machining production lines
- strict iso-based quality control system
- strong oem customization capability
- stable mass production and supply capability
- global export experience
- engineering technical support
Flybear provides reliable industrial fasteners and complete fastening solutions for global industries.
Quality Inspection and Control
Each DIN931 316 stainless steel hex head bolt undergoes strict quality inspection:
- chemical composition analysis
- tensile strength testing
- hardness testing
- thread gauge inspection
- dimensional accuracy measurement
- corrosion resistance testing (salt spray)
- surface defect inspection
- packaging quality inspection
All processes follow iso quality management standards to ensure consistent performance.
Selection Guide
When selecting a DIN931 316 stainless steel hex head bolt, consider:
- load type (shear vs tensile)
- environmental corrosion level
- required strength grade (a4-70 / a4-80)
- bolt diameter and length
- assembly structure requirements
- thread engagement length
Proper selection ensures safe and stable mechanical performance.
FAQ
1. what is din931 bolt?
it is a partially threaded hex head bolt used for structural fastening applications.
2. what is the difference between din931 and din933?
din931 is partial thread, din933 is full thread.
3. is 316 stainless steel suitable for marine use?
yes, it offers excellent corrosion resistance in seawater environments.
4. why use partial thread bolts?
they provide better shear strength and structural stability.
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.
