Comparison : Item # SF250203C, SF250203C - 1/4-20 Flush Nuts
Item # SF250204C, SF250204C - 1/4-20 Flush Nuts
Item # SF250205C, SF250205C - 1/4-20 Flush Nuts
Item # SF250283C, SF250283C - 1/4-28 Flush Nuts
Item # SF250284C, SF250284C - 1/4-28 Flush Nuts