These are Great Planes' 6-32 Nylon Insert Lock Nuts.

FEATURES: Metal construction with zinc plating to prevent rust from oxidizing
on parts.
White nylon inserts
Comes in a Parts-Pak clear plastic box with resealable lid
One year quality guarantee

INCLUDES: (4) Lock Nuts

REQUIRES: 5/16" Wrench

SPECS: Thread Size: 6-32
KPM 11/02/93
ir/jl
kr3/18/03

BOX DIMENSIONS: 2.00" W. X .50" H. X 3.75" L.
BOX WEIGHT: .02 LBS.