• THREAD SERIES DESIGNATOR : UNC
  • NOMINAL THREAD DIAMETER : 0.250 INCHES
  • THREAD QUANTITY PER INCH : 20
  • THREAD CLASS : 2A
  • THREAD DIRECTION : RIGHT-HAND
  • THREAD LENGTH : 0.500 INCHES MAXIMUM​​​​​​​
  • FASTENER LENGTH : 0.500 INCHES NOMINAL 
  • MATERIAL : STEEL OVERALL​​​​​​​
  • MATERIAL DOCUMENT AND CLASSIFICATION : SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL​​​​​​​
  • SURFACE TREATMENT : CADMIUM AND CHROMATE OVERALL​​​​​​​
  • SURFACE TREATMENT DOCUMENT AND CLASSIFICATION : QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL​​​​​​​
  • HARDNESS RATING : 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL​​​​​​​
  • MINIMUM TENSILE STRENGTH : 120000 POUNDS PER SQUARE INCH​​​​​​​
  • MINIMUM YIELD STRENGTH : 85000 POUNDS PER SQUARE INCH​​​​​​​
  • HEAD STYLE : C1 HEXAGON​​​​​​​
  • HEAD HEIGHT : 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM​​​​​​​
  • WIDTH BETWEEN FLATS : 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM​​​​​​​
  • MANUFACTURERS CODE : 96906​​​​​​​
  • NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE : MS90725-3​​​​​​​

Hexagon Head Cap Screw

  • Fastener Length: 1/2", Thread: 1/4-20, Thread Length: 1/2"