Knox Box Standpipe Lock 2 1/2" Female NH/NST Locking Cap Model:4011 (7.5 TPI x 3.068 OD) The most common 1 S5F3N Model:3136 (6.0 TPI x 3.095 OD) Equivalent part number HA2525T Female Size_4 Inch
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Ships within 48 hours · Estimated delivery Nov 8 - Nov 13