As a development boards & kits - avr component, the 2221 is manufactured and supplied by Adafruit. It features type: Hex Standoff, threaded/unthreaded: Threaded, gender: Female, Female, screw, thread size: #8-32, diameter, inside: - and diameter, outside: 0.250" (6.35mm) 1/4" Hex. This part has a typical lead time of 5 Days from factory and ships with a full manufacturer datasheet available for download. Simplytronix carries 2221 in stock, backed by a genuine parts guarantee and quick dispatch.