#0000038

5/16-18x1 1/4 J429 GR 5 Hex Hd Cap Screw Zinc Clear Trivalent Finish 0.0003" + Seal
Diameter Thread Threads Length Grade Finish Weight
0.3125 (5/16) Full 18 1.25 (1 1/4) Grade 5 Zinc Clear Trivalent .0003 Min w/Top Coat Sealer .0337
Diameter 0.3125 (5/16)
Thread 18
Length 1.25 (1 1/4)
Grade Grade 5
Finish Zinc Clear Trivalent .0003 Min w/Top Coat Sealer
Weight .0337



Hex Head Cap Screws, or Partial Thread Cap Screws, are a staple in the fastener industry. They are commonly called “hex bolts” but a hex cap screw is made to a higher quality than Hex Head Bolts allowing the head to hold flush to the clamped material. Earnest offers Cap Screws in grades 5 and 8

Hex Head Cap ScrewGrade 5

  • Sizes range from 1/4" to 2
  • Meets ASME B18.2.1 standards
  • Hex Head Cap Screw – Grade 8

  • Sizes range from 1/4" to 2
  • Meets ASME B18.2.1 standards
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