The NAS1423/NAS509 series hexagon nuts fall into the jam (aka check or thin) nut category. Jam nuts are a style of nut that features a low profile,
NAS509-3 Nut
NAS1423 Nuts - Military Fasteners
NAS50-7 RH Steel Drilled Jam Nut Aerospace Aviation Nuts, NOT PLATED (Lot of 10)
AVIATIONEU NEW ERA MS14144 Series Slotted Self Locking Castellated Nuts SKU: ANEUNE-NUT-CSTLCK-MS14144
Thread Size: 3/8in., Nut Height: 1/4in., Head Width: 1/2in.
Plain Hexagon Nut
NAS509 Drilled Hex Nuts - LH And Rh
National Aerospace Standard NAS509-10 Steel Nut, Self-Locking, Hexagon at
Nuts
National Aerospace Standard (NAS) bolts come in a large variance of lengths, thread types, head type, and materials. NAS bolts are suitable for high
AVIATIONEU NEW ERA NAS428 Series Steel Machine Bolts SKU: AVEUNE-BLT-MCN-NAS428