
Precision Shoulder Bolt – Hex Socket Head
Precision-machined shoulder bolt with hex socket head, ideal for locating, pivoting, or guiding components in mechanical assemblies. Available in carbon steel or stainless steel. Shoulder diameter and length can be customized.
This shoulder bolt—also known as a shoulder screw—is engineered for high-strength applications requiring accurate component alignment, sliding, or rotation. The design features a long, precision-ground shoulder with a consistent diameter, paired with a standard threaded section and hex socket head for secure fastening.
The shoulder acts as a dowel, spacer, or guide, commonly used in jigs, tool fixtures, die assemblies, moving parts, and mechanical linkages. The hex socket head allows for easy installation and removal with an Allen wrench.
Offered in hardened alloy steel or stainless steel 304/316, this bolt is suitable for both general-purpose industrial use and high-corrosion environments. Full dimensional customization is available based on your technical drawing or sample.
Applications
Automation and fixture assemblies
Robotics and linear motion systems
Mold bases and stamping dies
Rotating joints and pivot arms
Machine tool setups
Automotive and aerospace components
✅ Technical Specifications
Component | Material Options |
---|---|
Shoulder & Thread | Alloy Steel / Stainless Steel 304 / 316 |
Head Type | Hex Socket Head (Standard Allen) |
Thread Type | Metric / UNC / UNF (customizable) |
Available Sizes:
Parameter | Range |
---|---|
Shoulder Diameter | 4 mm – 20 mm |
Shoulder Length | 5 mm – 100 mm |
Thread Length | According to size (customizable) |
Thread Size | M3–M16 / #4–5/8” |
Tolerance | h9 / custom precision |
OEM dimensions and tolerances can be made to drawing or CAD model.
✅ Key Features
Precision-ground shoulder for consistent fit and alignment
Hex socket head for strong, torque-resistant tightening
Dual-function as both fastener and shaft
Ideal for locating, pivoting, or sliding applications
Custom dimensions and threads available
✅ Ordering Information
Please include in your inquiry:
Shoulder diameter & length
Thread size and type (e.g., M8x1.25)
Quantity
Preferred material (e.g., stainless steel 304)
Drawings or CAD file if available
Free Sample
VIP Service
Shipping order track
Free Return
Intact Guarantee
Why Choose SKN as Fastener Manufacturer
10+ Years Experience
With over a decade of experience in the fastener product industry, SKN has developed a deep understanding of diverse market demands and wholesale customer requirements.
- Operating 8 advanced production lines
- we manufacture up to 50,000 high-quality fastener products daily.
- Our commitment to excellence has enabled us to export to more than 30 countries worldwide, including the United States, Germany, Japan, and Australia, ect.

Strict Quality Control
Hardened and highly abrasion-resistant stainless steel raw materials and strict production quality control ensure that every product is high precision and high quality
- 100% high quliaty raw material
- Full quality inspection
- ISO 9001 standard

Strict Quality Control
Hardened and highly abrasion-resistant stainless steel raw materials and strict production quality control ensure that every product is high precision and high quality
- 100% high quliaty raw material
- Full quality inspection
- ISO 9001 standard
