Mack NM Truck, 6-Ton, 6x6, Cargo

The Mack NM was the first military 6x6. It debuted in 1940. The NM's were used for hauling AA guns and crews. The enclosed cab came from the commercial L-model.

NM-1 and NM-2: Amidships, a winch with a capstan head was mounted. It had a short steel cargo body of 132 x 88 in. The cargo body had troop seats, a canvas cover, and a spare tire on the front right side.

NM-2 had smaller head lamps and parking lamps on top.

The NM-3 was the last to have an enclosed cap. It was similar to the NM-1 and NM-2 except for: front pintle for positioning artillery pieces, arched bumper (front pintle under the arche), smaller brush guard, side lights on mudguards, towing hooks on bumper deleted, radiator shell with Mack nameplate.

NM-1, -2 and -3 all had commercial type tires, make Lee, with highway tread.

There has been no NM-4. The prototype NN-2 destined to be this NM has not gone into production.

The NM-5 and -6 had a soft top cab with folding windscreen. It had a wooden cargo body with two spare tires at the front right and left. They had some technical detail changes. Only differences between the NM-5 and -6 were rifle brackets in the cab and jerrycan holders left of the winch for the NM-6.

NM-7 and NM-8 were like the NM-5 and -6. There were only minor detail modifications. Some were equipped with the gun-carriage brake cylinder: this was an air-cylinder from Hanna for the simultaneous actuation (cable operated) of the air brakes of the truck and the mechanical brakes of the gun.

Many NM's were used by the British as recovery vehicles.

Gallery
 File:Mack NM.2.jpg|Mack NM-2 File:Mack NM.jpg|Mack specifications 

Technical data
Wheelbase: 177 in. Overall Dimensions: 283 x 96 x 121 Weight: 21,750 lb Engine: Mack EY 6 cyl. 707-cid (5x6 in.) ohv petrol engine, 170 bhp at 2100 rpm. Gearbox: Mack TR36 5-speed direct-top Transfer Case: Timken-Detroit 2-speed T77 with 2.55 low Tires 9.75-22