The RM440SN100BK is a 100-pack of black #4-40 speed nuts for Hammond RM series top and bottom plate assembly. It is intended for OEM engineers, integrators and technicians who assemble or service RM series enclosures and need the mating nuts that receive #4-40 screws in the plate assembly.

The part drawing specifies black steel and a #4-40 speed nut thread. Dimensions called out on the drawing include 10.50 mm [0.413 in] as the largest dimension, a Ø4.00 mm [0.157 in] feature, and further dimensions of 6.50 mm [0.256 in], 4.68 mm [0.184 in], 3.25 mm [0.128 in], 2.30 mm [0.091 in], 2.29 mm [0.090 in] and 1.80 mm [0.071 in].

The series hardware list places this part in the assembly hardware for the RM series. The nuts are sold 100 per package in a box, with a shipping weight of 0.99 lbs (0.45 kg). The RM440SN100BK is RoHS compliant and REACH compliant.

Black #4-40 x 3/8" screws for the RM series are listed separately in the same hardware list. In most cases, enclosures include all hardware needed for assembly, so this pack is for replacements and spares. Hardware packs may not be compatible with all parts in the listed series; check the enclosure's replacement parts and accessories list to confirm fit.