Fastenle

1. Build a guess from the five lists: size, thread, length, grade and finish. Press Guess.
2. Each part lights up green if it’s right, amber if it’s close, or grey if it’s not it.
3. ↑︎ and ↓︎ on the size and length tell you whether the answer is bigger or smaller.
4. You have six guesses. Everyone gets the same fastener each day, and a new one comes out at midnight your time.

• Size: one standard size away, like 1/2″ when the answer is 5/8″.
• Thread: right series (coarse or fine) on the wrong size.
• Length: within 1/2″.
• Grade: the next grade over. Grade 5 is close to 2 and 8. 18-8 stainless is only ever right or wrong.
• Finish: the other zinc. Zinc clear is close to zinc yellow.

Use Copy result to share your score without giving away the answer. Stats are saved in this browser only. Not sure of a thread? Check the thread pitch chart.