Products Description
Square Head Bolts – The square-shaped head provides a large contact area for wrenches, so it doesn't slip easily when tightening. This makes it ideal for high-torque applications or frequent assembly and disassembly. The flat head surface sits evenly against the workpiece, giving good stability after locking. When used with square holes or pre-cut slots, the bolt head resists turning, which makes installation easier. Widely used in machinery, jigs and fixtures, rail fittings, and timber connections.
Parameters
|
Standard |
ASME B 18.2.1 |
|
Name |
Square head bolts |
|
Material |
carbon steel, alloy steel, etc. |
|
Grade |
Grade 4.8, Grade 5.8, Grade 8.8, Grade 10.9, Grade 12.9 |
|
Nominal diameter |
1/4-1-1/2 |
|
Pitch |
0.4-5 |
|
Finish |
ZP,YZ,BLACK |
|
Alias |
square head screws, square head fastening bolts |
Key Features
Excellent anti-rotation performance
The square head features four large force-bearing surfaces. It effectively prevents bolt rotation during fastening when matched with countersunk seats or square holes.
01
High torque transmission capacity
Large contact area between tools and bolt head withstands high torque without slipping or damage.
02
Easy identification
Distinct square shape allows quick recognition of specifications and installation orientation during maintenance.
03
Optional anti-loosening structure
Can be used with spring washers, lock nuts or thread locker to enhance fastening stability under vibration.
04
Our Products
How to Contact Us
If you require engineering drawings, 3D models, or sample testing for a specific model, please provide your application details and dimensional requirements, and we will provide you with a detailed proposal.
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