Precision M5-M24 Shoulder Screws: The Essential Component for Rotating Assemblies
Our M5-M24 Shoulder Screws, widely known as Shoulder Bolts or Stripper Bolts, are engineered for high-precision mechanical applications. Unlike standard bolts, these fasteners feature an enlarged, unthreaded precision-ground shoulder that serves as a pivot, axle, or stationary guide for moving parts. Manufactured strictly to ISO 7379 standards, our shoulder screws are foundational in the production of molds, dies, and automated machinery where tight tolerances and high shear strength are non-negotiable.
As a leading shoulder screw factory, we focus on extreme dimensional accuracy. Each M10 and M12 shoulder bolt undergoes a rigorous grinding process to achieve an h7 tolerance, ensuring seamless movement and minimal play in your mechanical linkages.
- Precision-Ground Shoulder: The unthreaded portion acts as a smooth shaft for pulleys, gears, or rotating levers, reducing friction and wear.
- High-Tensile Strength: Our 12.9 Grade Alloy Steel screws are heat-treated to HRC 39-44, providing the exceptional shear and tensile strength required for heavy-duty industrial use.
- Tight Tolerances: Standardized h7 tolerance on the shoulder diameter ensures a precise fit with mating parts, critical for high-speed automated systems.
- Corrosion Protection: Available in 304 and 316 Stainless Steel for medical, food-processing, and marine environments where hygiene and rust resistance are vital.
| Thread Size (d1) | Shoulder Dia (d2) | Head Dia (dk) | Head Height (k) |
|---|---|---|---|
| M5 | 6.0 mm (h7) | 10.0 mm | 4.5 mm |
| M6 | 8.0 mm (h7) | 13.0 mm | 5.5 mm |
| M8 | 10.0 mm (h7) | 16.0 mm | 7.0 mm |
| M10 | 12.0 mm (h7) | 18.0 mm | 9.0 mm |
| M12 | 16.0 mm (h7) | 24.0 mm | 11.0 mm |
- Die & Mold Making: Functioning as stripper bolts to guide plate movement and spring retention.
- Automation & Robotics: Acting as axles for small pulleys, idlers, and linkages in robotic arms.
- Printing & Packaging: Used in oscillating levers and rotating cams where smooth motion is required.
- Aerospace & Defense: SS316 shoulder screws are used in control systems for their high strength-to-weight ratio and environmental durability.
A: h7 is a standard clearance fit for stationary or slow-moving parts, while f7 provides a looser fit for high-speed rotation or where thermal expansion is a factor.
Q: Do you offer custom shoulder lengths?
A: Yes, we provide OEM customization for specific shoulder lengths (L) and diameters to meet your unique mechanical design requirements.
Source M5-M24 Shoulder Screws from a Professional Factory
Looking for bulk shoulder bolts with guaranteed precision and competitive factory pricing? We support global wholesale and ISO-certified manufacturing. Contact us today for a free quote and technical samples!
