AQ-AxBUx-W Threaded Connector With Nuts

Overview:

AQ-A4BU4-W - Threaded connector 1/4" x 1/4" QC with nuts.
AQ-A4BU5-W - Threaded connector 1/4" x 3/8" QC with nuts.
AQ-A5BU5-W - Threaded connector 3/8" x 3/8" QC with nuts.