Check the listing for details. Lot 100 #8-32 x 1/4 Hex Washer Head Self Threading Machine Screws Thread Forming. Condition: New. Listed at 7.99 USD. 2610XG1G.30 New #8-32 x 1/4" Hex Washer Head Heat Treated Machine Screws, Trivalent Zinc Plated Steel with TapTite Thread Forming Tips, Part Number 376223. Each bid quantity is for One Hundred (100) Screws. You may bid / buy any number, up to the total quantity available above. These were purchased at an industrial liquidation earlier this year, and they were brand new in the original factory boxes. We packaged them in heavy Ziplok bags for resale. In addition to being heat treated, these screws also have a special tapered three-lobed tip (See Picture #3). This allows the screw to easily swage its own threads in most mild steels and non-ferrous materials. According to the calipers Overall length: .368" / 9.36mm Thread length (beneath head to tip of threads): .238" / 6.05mm Washer head diameter: .334" / 8.49mm Hex size: .246" for (1/4") bit Threads: #8-32 x 1/4" (diameter - threads per inch x length)