A 9X21-I04 is an internal lock washer for #4 screw size, made of stainless steel, with an inside diameter ranging from 0.234 to 0.270 inches and a thickness of 0.015 to 0.019 inches.
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 | Washers |
| Product Number | A 9X21-I04 |
| Product Name | Internal Lock Washer, #4 Screw Size, 0.234375in. Outside Diameter, .016in. Thick, Material- Stainless Steel. |
| Washer Type | Lockwasher, Internal Tooth |
