PRESSURE GAUGE; WORKING RANGE: VACUUM UP TO 20000PSI; SIZE: 4-1 2”; GAUGE MATERIAL: ADJUSTABLE MICROMOMETER, ALUMINUM; CONNECTION TYPE:, PROCESS CONNECTION: 1 2” MALE NPT; CASE FILLING: SOLID FACE WITH PRESSURE RELIEF, PRESSURE IN THE BACK PART; DESIGNATED USE: PUMPS, 3221-BBA-008 009 015 016; STANDARDS AND SPECIFICATIONS: IP66; CHARACTERISTICS, ADDITIONAL: PRECISION: 0.5% OF INTERVAL; BRANDS, SUGGESTED: ASHCROFT 451259-S-L-04-L-1600KP