A 9C39-0440 is a carbon steel square machine key with a width of 0.125 inch and a length of 1.25 inches, featuring a tolerance of +0.000 / -0.002 inch on both dimensions and treated with a dry rust inhibitor. It is part of a series of square machine keys designed for mechanical assemblies, with dimensions and tolerances specified in the inch component table.
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 | Machine Keys and Keystock |
| Product Number | A 9C39-0440 |
| Product Name | 0.125" Wide X 0.125" Height X 1.25" Long Carbon steel machine key |
| Width | 0.1250 inch (3.17 mm) |
