UMMM...YEAH, THEY'RE RACK SCREWS
They are Rack Screws, plain and simple! They are Powder Coated with reduced tips (which makes it really nice to "find the right hole" without cross threading or stripping) and have a rubber washer to secure your gear without backing out due to vibration or rapid temperature changes. BTW, rule of thumb is regardless of how many you thing you need...DOUBLE IT! It never fails that the total number of screws that you need is about 6 less than what you bought!