Mack 1MR2472M Brake Light Pressure Switch 4 PSI – Mack Trucks Pressure Protection Valve 1-14 UNF spin-on thread

1-14 UNF spin-on thread

OTR: OTR320175

1 × 5/32" tube OD straight union (composite)

Fuller: C30892530

875" extended / 11

Mack 1MR2472M Brake Light Pressure Switch 4 PSI – Mack Trucks Pressure Protection Valve 1-14 UNF spin-on threadGenuine Mack OEM brake light pressure switch (1MR2472M) for Mack heavy duty trucks. Wired into the stop lamp circuit, this normally open switch closes at 4. 0 PSI to illuminate the brake lights when the service brakes are applied a non functioning switch is both a safety risk and a DOT out of service violation. The 1 8" NPT body ships with factory Loctite for a leak free install. PAI FSW 0491 is the verified premium aftermarket equivalent. Signs You