Product Information
Shoulder screws, also known as shoulder bolts, are a type of fastener. They consist of a cylindrical body with a shoulder or collar between the head and the threaded portion. The shoulder has a larger diameter than the threaded portion and is a precise reference point or bearing surface. Carr Lane Mfg. offers high-quality shoulder screws with close tolerances for superior performance in demanding applications that require precise alignment and smooth bearing action. Manufactured to exacting standards, our precision shoulder screws ensure reliable performance and durability. With their exceptional engineering, these shoulder screws are ideal for critical applications where precise performance is crucial, making them a reliable choice for your needs. With their precision engineering, our shoulder screws are ideal for critical applications where precision and performance are paramount. The shoulder diameter is ground to a closer tolerance than ordinary stripper bolts. This tighter tolerance ensures better-bearing action, allowing for smoother rotation and improved performance. Car lane Mfg. offers both inch and metric shoulder screws available in thread diameters from 1/4" to 3/4" (8 to 20mm). Precision shoulder screws are a reliable choice for high-performance and critical applications. This is due to their close tolerance, plus tolerance shoulder length and DFARS compliance.
Application Information
Shoulder screws are commonly used in various applications requiring precise alignment, spacing, or rotational movement. Some common uses of shoulder screws include: Machinery and equipment: Shoulder screws are often used in machinery and equipment setups for precise spacing and alignment between components. They can attach gears, pulleys, or other rotating parts. The shoulder serves as a bearing surface for smooth rotation. Tooling and fixtures: Shoulder screws are used in tooling and fixtures to provide precise alignment and positioning of workpieces. They can be used to attach jigs, fixtures, or templates to ensure accurate machining or assembly operations. Automotive and aerospace: Shoulder screws are used in automotive and aerospace applications. Precise alignment, spacing, and load-bearing capabilities are often critical. They can be used in engine components, suspension systems, and other critical assemblies. Electronics: Shoulder screws are used in electronic applications for mounting PCBs (Printed Circuit Boards) or other electronic components. The shoulder provides a stable and precise mounting surface to ensure proper alignment and spacing of components.
Material
MATERIAL | HEAT TREAT | FINISH | DFARS | RoHS |
Alloy Steel | heat treated Rc 32-43 | Black Oxide | Metric | ✔ |
Parts Specification
Part Number | SHOULDER DIA NOMINAL | SHOULDER DIA ACTUAL | A THREAD | B NOMINAL | B ACTUAL | D | E | F DIA | G |
CL-8-SS | 5/16 | .3125 | 1/4-20 | 1 | 1.0000 | 7/32 | 7/16 | 7/16 | 5/32 |

Warning:
This product can expose you to materials and/or chemicals including arsenic, lead, and other materials and/or chemicals which are known to the state of California to cause cancer and/or reproductive harm.
For more information, visit www.P65Warnings.ca.gov