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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

ComponentMaterial Options
Shoulder & ThreadAlloy Steel / Stainless Steel 304 / 316
Head TypeHex Socket Head (Standard Allen)
Thread TypeMetric / UNC / UNF (customizable)

Available Sizes:

ParameterRange
Shoulder Diameter4 mm – 20 mm
Shoulder Length5 mm – 100 mm
Thread LengthAccording to size (customizable)
Thread SizeM3–M16 / #4–5/8”
Toleranceh9 / 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

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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

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