Product Description
Imperial Size Hex Head Bolts made from Stainless Steel 304 are high-performance inch-thread fasteners designed for reliable fastening in industrial, construction, automotive, machinery, marine, and maintenance applications. Featuring a standard six-sided hex head and precision UNC/UNF threads, these stainless steel hex bolts provide excellent strength, corrosion resistance, and long-term durability.
Manufactured to international inch-thread standards, these hex cap screws are widely used in North American and international markets where imperial thread systems are required. Stainless Steel 304 construction offers outstanding resistance to rust, oxidation, moisture, and general atmospheric corrosion, making these bolts suitable for both indoor and outdoor environments.
Available in a wide range of diameters, thread types, and lengths, imperial stainless steel hex head bolts are ideal for metal-to-metal fastening, machinery assembly, structural connections, equipment maintenance, and engineering projects.
Key Features
- Manufactured with precision imperial inch threads
- Standard hex head for easy wrench installation
- Made from corrosion-resistant Stainless Steel 304
- Available in UNC (Coarse) and UNF (Fine) threads
- Excellent mechanical strength and durability
- Suitable for indoor and outdoor applications
- Compatible with standard inch nuts and washers
- Smooth surface finish and accurate thread machining
- Ideal for industrial, marine, automotive, and construction use
Product Specifications
| Specification |
Details |
| Product Name |
Imperial Hex Head Bolts |
| Head Type |
Hex Head |
| Thread Type |
UNC / UNF |
| Measurement System |
Imperial / Inch |
| Material |
Stainless Steel 304 (A2) |
| Thread Direction |
Right-Hand Thread |
| Standard |
ASME / ANSI / DIN Equivalent |
| Finish |
Plain Stainless Steel |
| Strength Grade |
Stainless Steel Standard Strength |
| Applications |
Machinery, Construction, Automotive, Marine |
Available Materials
| Material |
Characteristics |
Typical Applications |
| Stainless Steel 304 (A2) |
Excellent corrosion resistance |
General industrial & outdoor use |
| Stainless Steel 316 (A4) |
Superior marine corrosion resistance |
Coastal & chemical environments |
| Carbon Steel |
High strength economical option |
Heavy-duty indoor applications |
| Alloy Steel |
Enhanced tensile strength |
Machinery & structural fastening |
Thread Types Explained
| Thread Type |
Description |
Common Use |
| UNC |
Unified National Coarse Thread |
General fastening applications |
| UNF |
Unified National Fine Thread |
Precision & vibration-resistant assemblies |
UNC Threads
UNC threads are easier to install and better suited for general-purpose fastening where quick assembly is required.
UNF Threads
UNF threads provide higher clamping force and improved vibration resistance, commonly used in automotive and machinery applications.
Common Imperial Sizes
| Bolt Diameter |
Common Thread Type |
Typical Wrench Size |
| 1/4″-20 |
UNC |
7/16″ |
| 5/16″-18 |
UNC |
1/2″ |
| 3/8″-16 |
UNC |
9/16″ |
| 1/2″-13 |
UNC |
3/4″ |
| 5/8″-11 |
UNC |
15/16″ |
| 3/4″-10 |
UNC |
1-1/8″ |
Product Advantages
Excellent Corrosion Resistance
Stainless Steel 304 provides strong resistance against rust, moisture, oxidation, and many chemicals, making these bolts ideal for outdoor and humid environments.
High Installation Efficiency
The hex head design allows quick tightening using standard spanners, sockets, or power tools.
Strong Mechanical Performance
Imperial hex bolts provide reliable clamping force and structural stability for demanding industrial applications.
Wide Compatibility
Compatible with standard imperial nuts, washers, threaded holes, and fastening systems.
Clean Professional Appearance
The stainless steel surface offers a bright metallic finish suitable for visible installations.
Typical Applications
- Industrial machinery
- Construction equipment
- Automotive assembly
- Marine hardware
- Metal fabrication
- Structural steel connections
- Maintenance & repair operations
- Agricultural equipment
- Electrical installations
- Mechanical engineering projects
Surface Finish Options
| Finish |
Features |
| Plain Stainless Steel |
Natural corrosion resistance |
| Polished Finish |
Decorative smooth appearance |
| Passivated Surface |
Enhanced corrosion protection |
| Black Oxide |
Industrial dark finish |
Why Choose Stainless Steel 304 Hex Bolts?
Stainless Steel 304 is one of the most widely used stainless steel materials for fasteners due to its excellent balance of corrosion resistance, strength, workability, and cost-effectiveness. Compared with ordinary carbon steel bolts, SS304 hex bolts offer significantly longer service life and reduced maintenance costs.
These imperial hex head bolts are especially suitable for projects exposed to moisture, rain, or outdoor environments where rust prevention is critical.
Packaging Options
| Packaging Type |
Description |
| Small Box Packaging |
Retail & hardware sales |
| Bulk Carton Packaging |
Industrial wholesale supply |
| Pallet Packaging |
Export shipment |
| OEM Customized Packaging |
Private label & branded solutions |
FAQ
What is the difference between UNC and UNF threads?
UNC threads are coarse threads used for general applications, while UNF threads are finer and provide better vibration resistance and higher clamping force.
Are these bolts fully threaded?
Both fully threaded and partially threaded versions are available depending on size and customer requirements.
Is Stainless Steel 304 suitable for outdoor use?
Yes. SS304 offers excellent corrosion resistance for most outdoor and humid environments.
What is the difference between Stainless Steel 304 and 316?
304 is suitable for general applications, while 316 provides superior resistance in marine and chemical environments.
Can these bolts be used in marine environments?
For light marine exposure, SS304 is acceptable, but SS316 is recommended for saltwater or coastal applications.
What tools are required for installation?
Standard wrenches, sockets, spanners, or power tools compatible with imperial hex sizes can be used.
Are custom sizes and packaging available?
Yes. Customized diameters, lengths, thread types, finishes, and OEM packaging are available for bulk orders.
What industries commonly use imperial hex bolts?
Construction, automotive, machinery manufacturing, marine, agriculture, maintenance, and industrial engineering industries widely use imperial stainless steel hex bolts.
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