Product Description

Stainless Steel Square Head Bolts

Our Stainless Steel Square Head Bolts are durable metric fasteners designed for machinery, equipment assembly, industrial maintenance, construction, and custom fastening applications. Compared with standard hex head bolts, square head bolts provide a larger gripping surface and are commonly used where better wrench engagement, anti-rotation performance, or traditional fastening style is required.

These bolts are made from stainless steel, commonly available in A2-70 / 304 stainless steel, offering good corrosion resistance, clean appearance, and reliable mechanical performance. The full threaded design provides strong engagement with matching nuts or threaded holes.

Available in common metric sizes including M4, M5, M6, M8, M10, and M12, these square head bolts are suitable for both standard and customized fastening requirements.

Key Features

• Square head design for strong tool grip and stable tightening.
• Stainless steel material with good corrosion and rust resistance.
• A2-70 grade available, suitable for general industrial fastening.
• Fully threaded body for maximum thread engagement.
• Metric thread sizes from M4 to M12.
• Good anti-rotation performance in slots, channels, and square recesses.
• Suitable for machinery, equipment, construction, furniture, and repair work.
• Custom length and packaging available according to customer requirements.

Product Specifications

Size Chart

Unit: mm

What Are Square Head Bolts?

Square head bolts are bolts with a four-sided head instead of a hexagonal head. The square head provides a large contact area for tools and can also help prevent rotation when installed in a matching square slot or channel.

They are commonly used in:

Material Advantages

Stainless steel square head bolts are suitable for applications where corrosion resistance and clean appearance are important.

For most general-purpose applications, A2-70 / 304 stainless steel square head bolts provide a good balance of corrosion resistance, durability, and cost performance.

Common Applications

Product Advantages

These Stainless Steel Square Head Bolts are designed for secure and durable fastening. The square head makes the bolt easy to grip with tools and can help prevent spinning during installation in suitable applications.

The stainless steel material provides good resistance to rust and corrosion, making these bolts suitable for indoor, outdoor, and general industrial environments. With full metric threading, they can be used with matching metric nuts, washers, or threaded holes.

Installation Notes

Before placing an order, please confirm the following details:

Please use matching metric nuts and washers for correct assembly. If the bolt will be used in marine or chemical environments, 316 stainless steel is recommended.

Matching Products

Preguntas frecuentes

Q1: What is a square head bolt?

A square head bolt is a bolt with a four-sided square head. It provides strong tool grip and can help prevent rotation when used in square slots or special fixtures.

Q2: What material are these bolts made from?

They are made from stainless steel. Common material options include A2-70 / 304 stainless steel and A4 / 316 stainless steel.

Q3: What does A2-70 mean?

A2 usually refers to 304 stainless steel, and 70 refers to the strength class. A2-70 stainless steel fasteners are widely used for general corrosion-resistant applications.

Q4: What sizes are available?

Common sizes include M4, M5, M6, M8, M10, and M12. Other sizes can be customized according to drawings or samples.

Q5: Are these bolts fully threaded?

Yes, the product shown is a fully threaded square head bolt. Partial thread versions can also be customized if required.

Q6: Can these bolts be used outdoors?

Yes. Stainless steel square head bolts can be used outdoors. For normal outdoor use, 304 stainless steel is suitable. For marine or highly corrosive environments, 316 stainless steel is recommended.

Q7: What tools are used to install square head bolts?

They can be installed with an adjustable wrench, open-end wrench, spanner, or custom fixture that fits the square head.

Q8: Can you supply matching nuts and washers?

Yes. Matching stainless steel nuts, flat washers, spring washers, and custom fastener sets can be supplied.

Q9: Can the length be customized?

Yes. Length, material, thread type, surface finish, and packaging can be customized according to customer requirements.

Q10: What are square head bolts mainly used for?

They are commonly used in machinery, construction, industrial equipment, furniture assembly, agricultural machinery, repair work, and custom fastening projects.

Short Product Summary

Stainless Steel Square Head Bolts M4 M5 M6 M8 M10 M12 are corrosion-resistant metric fasteners with a four-sided square head and fully threaded body. Made from stainless steel, commonly A2-70 / 304 stainless steel, they are suitable for machinery, construction, industrial equipment, furniture, repair work, and custom fastening applications. Matching nuts, washers, customized sizes, and bulk packaging are available.