DIN933 304 Stainless Steel Hex Bolt
DIN933 304 Stainless Steel Hex Bolt is a fully threaded metric hex head bolt designed for reliable fastening in industrial, commercial, and engineering applications. Made from 304 stainless steel, this bolt offers strong corrosion resistance, clean surface quality, and stable mechanical performance. Therefore, it is widely used by OEM manufacturers, distributors, EPC contractors, machinery builders, and purchasing teams that require dependable stainless steel fasteners for long-term assembly work.
Product Overview
The DIN933 304 Stainless Steel Hex Bolt follows the DIN933 standard, which defines a fully threaded hex head bolt structure. Unlike partially threaded bolts, this full thread hex bolt provides extended thread engagement across the entire shank. As a result, it is suitable for assemblies that require adjustable clamping depth, secure fastening, and easy installation.
This stainless steel hex bolt features a standard hexagonal head for use with common spanners, sockets, and torque tools. Its natural stainless steel finish provides a clean appearance without additional coating. Moreover, 304 stainless steel gives the bolt good resistance to moisture, oxidation, and many mild chemical environments.
The DIN933 bolt is commonly used in construction, industrial equipment, machinery frames, renewable energy systems, marine hardware, food equipment, and general manufacturing. For buyers seeking a metric hex bolt with corrosion resistance and consistent dimensions, this product offers a practical and cost-effective solution.
Product Specifications
| Item | Specification |
|---|---|
| Standard | DIN933 |
| Product Name | DIN933 304 Stainless Steel Hex Bolt |
| Material | 304 Stainless Steel |
| Thread Type | Full Thread |
| Head Type | Hex Head |
| Drive Type | External Hex Drive |
| Diameter Range | M3–M64, or customized |
| Length Range | 6 mm–300 mm, or customized |
| Surface Finish | Natural Stainless Steel |
| Strength Grade | According to stainless steel bolt property class, commonly A2-70 or customized |
| Thread Direction | Right-hand thread as standard |
| Packaging | Carton, pallet, bulk box, small box, or customer-specified packaging |
| Customization | Size, thread length, marking, packaging, and OEM/ODM requirements available |
Technical Parameters
| Parameter | Reference Value |
| Tensile Strength | Commonly around 700 MPa for A2-70 class |
| Yield Strength | Depends on size and property class |
| Hardness | Typically within stainless steel fastener standard range |
| Density | About 7.93 g/cm³ |
| Corrosion Resistance | Good resistance to moisture, oxidation, and mild chemical exposure |
| Operating Temperature | Suitable for many normal industrial temperature conditions |
| Thread Tolerance | Metric thread tolerance according to applicable DIN/ISO requirements |
| Manufacturing Standard | DIN933 and related metric fastener standards |
Materials and Manufacturing Process
High-quality raw material selection is the first step in producing a reliable 304 stainless steel bolt. The material must meet chemical composition requirements and provide stable corrosion resistance. Before production, wire rods or bars are checked to support consistent forming and machining performance.
For standard sizes, cold forging is often used to form the hex head and bolt body efficiently. This process improves production consistency and helps maintain dimensional accuracy. For larger diameters or special sizes, hot forging may apply when cold forming is not practical.
After heading, CNC machining may be used for special dimensions, chamfers, or non-standard requirements. Thread rolling then forms the metric thread without cutting away material. This method helps improve thread strength and surface finish. In most cases, 304 stainless steel fasteners do not require conventional heat treatment like carbon steel bolts. However, process control remains important to maintain stable mechanical properties.
Finally, surface finishing, cleaning, inspection, and packaging are completed. The natural stainless steel finish keeps the bolt clean and corrosion resistant. Each production batch is controlled to support consistent quality for bulk supply and long-term procurement programs.
Applications of the Product
The DIN933 304 Stainless Steel Hex Bolt is suitable for many industries because it combines full thread engagement, corrosion resistance, and easy installation.
In construction, it is used for steel structures, brackets, frames, and support systems. In machinery, it helps assemble housings, guards, base plates, and mechanical components. Automotive and transportation manufacturers use stainless steel fasteners where durability and clean appearance matter.
Renewable energy projects, including solar mounting systems and wind-related equipment, often require corrosion-resistant fastening parts for outdoor use. Petrochemical and marine applications also benefit from 304 stainless steel when exposure conditions are moderate. In food equipment, the smooth stainless surface supports clean assembly and reduces contamination risks.
Industrial equipment builders and general manufacturers choose this hex head bolt because it works with standard tools and offers stable performance across many assembly conditions.
Why Choose This Product
This DIN933 304 Stainless Steel Hex Bolt offers several practical advantages for industrial buyers. First, 304 stainless steel provides strong general corrosion resistance. Therefore, it performs well in indoor, outdoor, and mildly corrosive environments.
Second, precision manufacturing supports accurate dimensions, proper thread fit, and reliable installation. The full thread design gives engineers more flexibility during assembly. In addition, stable mechanical properties help reduce fastening failure risks under normal working conditions.
This product also supports long service life when selected correctly for the operating environment. For procurement teams, bulk supply and standard packaging options help improve purchasing efficiency. OEM and ODM support can also meet special drawing, size, marking, or packaging requirements. With fast delivery planning and global export experience, this stainless steel hex bolt is a dependable choice for distributors and manufacturers.
Why Choose Flybear
Flybear supplies industrial fasteners for buyers who need consistent quality, technical communication, and flexible production support. The company focuses on manufacturing capability, inventory coordination, and custom production for standard and non-standard fastening products.
Flybear supports customers with engineering consultation during product selection. This helps buyers confirm material, size, thread type, surface finish, and application requirements. Moreover, available inventory for common sizes can help reduce lead time for urgent orders.
For OEM manufacturers and distributors, Flybear can arrange custom production based on samples, drawings, or project specifications. The company also supports global export orders with suitable packaging and documentation. Therefore, buyers can source stainless steel fasteners with better communication and more stable supply planning.
Quality Inspection and Testing
Quality control is essential for every DIN933 304 Stainless Steel Hex Bolt. During production, chemical composition analysis verifies that the stainless steel material meets the required grade. Tensile testing checks mechanical strength, while hardness testing helps confirm material consistency.
Salt spray testing may be used to evaluate corrosion resistance under controlled conditions. Thread gauge inspection ensures proper thread fit and assembly compatibility. Dimensional inspection checks diameter, length, head width, head height, chamfer, and thread accuracy.
Surface inspection helps identify cracks, burrs, stains, or forming defects. Packaging inspection confirms label accuracy, quantity, carton strength, and export packing requirements. In addition, production and inspection processes follow ISO quality management principles to support traceability and consistent supply.
Selection Guide for DIN933 304 Stainless Steel Hex Bolt
Choosing the right DIN933 304 Stainless Steel Hex Bolt starts with the material. 304 stainless steel suits many general corrosion environments. However, harsher chloride or chemical environments may require other stainless steel grades.
Next, confirm the diameter and length based on assembly thickness, thread engagement, and load requirements. The bolt must provide enough thread contact without causing interference. For heavy-duty applications, engineers should also review tensile strength, torque values, and joint design.
Indoor applications may focus more on strength and fit. Outdoor applications need stronger attention to corrosion resistance, drainage, and environmental exposure. Buyers should also consider whether standard DIN933 dimensions meet the project, or whether custom sizes and packaging are needed.
For critical assemblies, consult engineering support before ordering. This helps reduce mismatch risks and improves fastening reliability.
Frequently Asked Questions
What is DIN933?
DIN933 is a German standard for fully threaded hex head bolts. It defines important dimensions such as head size, thread length, diameter, and general bolt geometry.
Is 304 stainless steel suitable for outdoor use?
Yes. 304 stainless steel offers good outdoor corrosion resistance in many normal environments. However, coastal, marine, or strong chemical environments may require a higher corrosion-resistant material.
What is the difference between DIN933 and DIN931?
DIN933 bolts are fully threaded, while DIN931 bolts are partially threaded. DIN933 is better when full thread engagement or adjustable clamping depth is required.
Can custom sizes be produced?
Yes. Custom diameter, length, thread length, head marking, packaging, and drawing-based production can be arranged according to order requirements.
How do I request a quotation?
Please provide the bolt size, quantity, material, standard, packaging request, and delivery destination. Drawings or samples are helpful for custom fastener projects.
In conclusion, the DIN933 304 Stainless Steel Hex Bolt is a practical fastening solution for industrial buyers who need corrosion resistance, full thread engagement, accurate dimensions, and stable supply. It is suitable for construction, machinery, automotive, renewable energy, petrochemical, marine, food equipment, and general manufacturing applications.
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 quotations, customization, bulk orders, or engineering support, please Contact Us.
