QUALTEK SAFETY RETAINER CLIPS 562-730B-01 562-730B-05 562-731B-00 562-732B-00 The actual manufacturer part numbers for the above Mouser part numbers do not have the "B" within their part number. The "B" was for internal reference only and should not be ordered this way. Future shipments from the manufacturer will not have the "B" in their part number. Please see below: Mouser Part Number Correct Mfg Part Number 562-730B-01 730-00/00 562-730B-05 730-00/05 562-731B-00 731-00/00 562-732B-00 732-00/00 5-0107-3