2a thread class right-hand 0.500" thread length hexagon head style 1.000" grip length 28 thread quantity per inch used on trailer adapter unf thread series
Used on mc130h sentin. 2a thread class right-hand 2.250" thread length 20 thread quantity per inch zinc surface treated acute angle bend unc thread series
Used on an/spn-35c. 2a thread class right-hand flat chamfer head style 32 thread quantity per inch item modified from nsn 5305-01-148-2651, groove ground into shoulder about 0.385 from head of fastener unf thread series
Used on aircraft, stratolifter c-135. flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.376" grip length silver sleeve surface treated
3a thread class right-hand 0.469" thread length oval countersunk head style 0.990" grip length 28 thread quantity per inch item is for use in applications requiring high shear and/or moderate staticor dynamic tension capabilities unjf thread series
3a thread class right-hand 0.375" thread length flat chamfer head style 24 thread quantity per inch screws to be subject to hydrogen embrittlement relief treatment zinc surface treated unc thread series
