• THREAD SERIES DESIGNATOR : UNF 
  • NOMINAL THREAD DIAMETER : 0.312 INCHES
  • THREAD QUANTITY PER INCH : 24​​​​​​​
  • THREAD CLASS : 2A​​​​​​​
  • THREAD DIRECTION : RIGHT-HAND​​​​​​​
  • THREAD LENGTH : 0.615 INCHES MINIMUM AND 0.719 INCHES MAXIMUM​​​​​​​
  • FASTENER LENGTH : 0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM​​​​​​​
  • MATERIAL : STEEL OVERALL​​​​​​​
  • MATERIAL DOCUMENT AND CLASSIFICATION : SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL​​​​​​​
  • SURFACE TREATMENT : ZINC AND CHROMATE OVERALL​​​​​​​
  • SURFACE TREATMENT DOCUMENT AND CLASSIFICATION : ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL​​​​​​​
  • HARDNESS RATING : 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL​​​​​​​
  • MINIMUM TENSILE STRENGTH : 150000 POUNDS PER SQUARE INCH​​​​​​​
  • HEAD STYLE : C1 HEXAGON​​​​​​​
  • HEAD HEIGHT : 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM​​​​​​​
  • WIDTH BETWEEN FLATS : 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
  • SURFACE FINISH : 63.0 MICROINCHES THREADS
  • FEATURES PROVIDED : FINISHED HEAD​​​​​​​

Machine Bolt

  • Fastener Length: 3/4", Thread: 1/4-24, Thread Length: 23/32"