S78ESYM125120040 is a helical extension spring made of 302 stainless steel, spring temper, with a 12.5 mm outside diameter and a 40 mm free length. It has a maximum load capacity of 36.87 N and a spring rate of 0.798 N/mm. The spring is supplied with open or closed loops at the manufacturer's option, and loop orientation and winding direction may vary. The component is metric and designed for extension applications.
Industrial fasteners are hardware devices that join two or more items together, creating a semi-permanent or permanent connection. The fasteners most frequently used by machinery designers are screws, nuts, retaining rings, and various types of pins because of the basic role that they play in the assembly of mechanisms. Various industrial hardware components are used in the assembly process including knobs, washers, spacers, shims, handles, springs, spring-powered reels, and ball plunger screws.
Fasteners play a vital role in a wide range of applications, from everyday household items to medical devices, robotics, and even outer space. Careful consideration must be given before selecting the most appropriate fastener for an application.
Download Reference Tables to help with selection:
| Stock Drive Products & Sterling Instrument - SDP/SI | |
|---|---|
| Product Category | Extension Springs |
| Product Number | S78ESYM125120040 |
| Product Name | 12.5mm Outside diameter, 40mm Free Length Helical Extension Spring |
| Material | Stainless steel |
| Outer Diameter (OD) | 0.4921 inch (12.5 mm) |
| Wire Diameter | 0.0472 inch (1.2 mm) |
| Free Length | 1.57 inch (40 mm) |
