Here we have a Snap-On PHG81A.
TCT-516 Tungsten Carb. Wide Spray Insert. 5/16" straight Bore, OD= 3/4"
BCI-516 Boron Carbide, Wide Spray Insert, Bore= 5/16", Outer diam. 0.75"
Nu-Mark N-516 6" Heavy Duty Pneumatic Sander
MILTON INDUSTRIES S-516 Tire Inflator Gage Made in USA
Milton Straight Foot Chuck Inflator Gauge 15" Dual Head Hose 10-160 PSI S-516
Plews 50-516 Oiler Pistol 6 Oz. 6" Flex Base