4" NPT Male Coupler Type B Aluminium - B4-AU-NPT .B. 1/2" sizes are only supplied with one locking arm. Connection/Thread Type: 4" MPN: B4-AU-NPT Product Code: B4-AU-NPT This is an online offer only for a Limited Time! Availability: In stock Only £24.70 incl VAT. Delivery available to UK/Europe |