Knox Box FDC Lock 2 1/2" NH/NST Male Locking Cap Inlet Size_2 Inch Type "DD" spool stainless steel

Type "DD" spool stainless steel 3 inch female camlock (Cam & Groove) coupler to 3 inch female camlock (Cam & Groove)

Enables a firefighter to grab a fold of hose

Carbon Steel 4" Flange x 4 1/2" Female NH

Global jump size aluminum 3 inch female camlock (Cam & Groove) coupler to 4 inch male camlock (Cam & Groove) coupler

The glycerine protects the gauge from freezing to -40° F and reduces the effects of vibration to allow accurate readings

Knox Box FDC Lock 2 1/2" NH/NST Male Locking Cap Inlet Size_2 Inch Type "DD" spool stainless steelThe 3110 model with 2" NH threads (7. 5 TPI x 3. 068 OD) is the most widely used configuration however, thread patterns and sizes vary by jurisdiction, so always verify the correct specifications with your local fire department before ordering. Knox FDC Locks protect fire department connections (FDCs), keeping pipes clean of debris to ensure the delivery of high pressure water flow to fire sprinkler systems. The Knox FDC Lock is available in 2 1 2"