Hammond HP75SSN4 3/4" Conduit Stainless Steel Hole Plug, Type 4X

The HP75SSN4 seals a .75" conduit hole that is no longer in use. It accepts holes up to a maximum diameter of 1.06 in (27 mm) and presents a 1.56 in (40 mm) diameter plug face on the outside of the enclosure. It is a straightforward fix for installers and maintenance teams who need to keep a stainless or Type 4X enclosure sealed after changing its conduit entries.

Made from brushed natural 304 stainless steel with an oil resistant gasket, the plug is designed to protect unused conduit openings and knockout holes against dust, oil and water. It is one of 8 sizes in the HPN4SS series, falling between the .5" conduit plug and the 30mm pushbutton plug in the ordering table. The drawing shows the plug diameter as 39.69 mm [1.56 in], and the part has the short description 0.75" SS HOLE PLUG NEMA 4X.

It is secured with a 10-24 x 0.55" threaded stud and a stainless steel wing nut. The part drawing notes a 5.40 mm [.21 in] dimension that varies with wall thickness.40 mm [.21 in] and varies with wall thickness.

HPN4SS plugs are UR and cUR recognized components for Type 1, 3, 3R, 4, 4X, 12 and 13. The HP75SSN4 is also listed as REACH and RoHS compliant, with a 0.05 lbs (0.02 kg) shipping weight.