VDO Heavy Duty Normally Closed Single Circuit 4 PSI Pressure Switch [230-504] Marine Plumbing & Ventilation | Blowers & Heaters Originally they were used for

Originally they were used for mounting on the backside of dash panels for mounting to the console

NF-5 Fenders

septic tank

Series 20 Ball Bearing Block - Single - Cheek Rivet Mount

the SmartFind M10

VDO Heavy Duty Normally Closed Single Circuit 4 PSI Pressure Switch [230-504] Marine Plumbing & Ventilation | Blowers & Heaters Originally they were used forHeavy Duty Normally Closed Single Circuit 4 PSI Pressure Switch Features: Ground Floating Connection # 8 32 Voltage 6 24V Circuit Normally Closed Single Contacts Silver Alloy Max. Pressure Range 4 PSI Terminals 2 *Sold as an Individual WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.