This low pressure switch is sold as a two-pack for Mack and Volvo miscellaneous applications. It stays normally closed at 0 psig and opens at 70 psig, with an adjustment range up to 5 psig set by turning clockwise to decrease, no lock-tite needed. The fitting is 1/4in-18 National Pipe Thread. This type of switch tracks line pressure and signals or shuts down the system when it drops below a safe level to protect the compressor.Interchanges:1MR2415279472279472BXWBX279472This unit is sold in packs of 2.FeaturesPack of 2 switchesNormally closed at 0 psigOpens at 70 psigFully adjustable to 5 psig, no-lock-tite, clockwise decrease1/4in-18 National Pipe Thread fittingUsed in Mack and Volvo miscellaneous applicationsTech SpecsThread: 1/4in-18 National Pipe Thread (NPT)Switch state: Normally closed at 0 psig, opens at 70 psigAdjustment range: Fully adjustable to 5 psig, no-lock-tite, clockwise decreaseDimensions (HxWxL): 1 x 4 x 4 in.Additional InformationFits Mack Universal applications.