S78ESYM125120030 is a helical extension spring made of 302 stainless steel, spring temper, with a 12.5 mm outside diameter, a 30 mm free length, and a maximum load of 17.03 N at a rate of 1.728 N/mm. It is supplied with open or closed loops at the manufacturer's option and may be right- or left-hand wound. The wire diameter is 1.2 mm.
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 | S78ESYM125120030 |
| Product Name | 12.5mm Outside diameter, 30mm 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 | 1.18 inch (30 mm) |
