The Similar Part Number check box provides result records that have Part Numbers similar in nature to the requested Part Number reflecting number/letter transposition searching.
Examples include:
1. Zeros and the letter 'O'.
2. Fives and the letter 'S'.
3. Ones and the letter 'I' (caps i) and the letter 'l' (small ell).
As a result, a search for 6RO5I would match that exactly or could match 6R0S1 as well.