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Sargent 351 Series Powerglide® grade 1 surface mounted Compression Holder Heavy Duty Arm x TB door closer with adjustable closing force ranging from size 1-6. User friendly versatile mounting applications permit standard, top jamb, parallel and track installations. The 351 Door Closers is non-sized so that closing force can be adjusted in the field to accommodate various door sizes and weights. Adjustable spring power allows 351 closers a size range of 1 through 6. They are adjusted to size 3 before leaving the factory. 351 series catalog Features • Certified ANSI/BHMA A156.4 Grade 1 • Conforms to UL10C and UBC for positive pressure fire test • UL Listed and cUL Listed to Canadian Safety Standards listed for use on fire doors • Ten year warranty • User friendly versatile mounting applications permit standard, top jamb, parallel and track installations • Self sticking templates supplied for most applications • Adjustable spring power allows 351 closers a size range of 1 through 6. They are adjusted to size 3 before leaving the factory • One door closer body for all applications. All 351 are non-handed • Meets ADA requirements in all applications, except Push Side Track application (except track)