Your search query on "MCDONNELL & MILLER Limit & Snap Action Switches" returned the following results:

McDonnell & Miller, FS4-3T1-3/4, 3/4" Flow Switch w/NPT body (High Flow Rate) (325753681835)

MCDONNELL & MILLER 115000 FS4-3T3-3/4 FLOW SWITCH 3/4" NPT, LOW FLOW RATE, SPDT (196352461391)

McDonnell & Miller No 7B Limit Switch 330N Potentiometer (355818302409)

McDonnell & Miller FS4-3S Flow Switch 1" NPT 115VAC@7.4A.F.L. 160 psi USED (225289772588)

McDonnell & Miller Limit Switch 330N (256266004413)

Mcdonnell & Miller Afe-1 Air Flow Switch 120 Vac 15a (334377267615)