Imperial 17678 Sae Hex Head Cap Screws, Grade 8, 7/16x2-1/2, Pkg/50

buy nuts, bolts, screws & fasteners at cheap rate in bulk. wholesale & retail construction hardware tools store. home décor ideas, maintenance, repair replacement parts
Write a review
Imperial's zinc-yellow-dichromate plating provides the extra corrosion protection not found in regular zinc plated fasteners, Material: Medium Carbon Alloy Steel, Finish: Zinc Yellow, Pkg/50
SKU: 42624455
MFG: 17678
Shop more products by Imperial.

Best online store to shop construction hardware tools. Save big with Life and Home discount coupons

Sold out
Sold Out
Request a Bulk Quote

Thank you for your quote request. We will be in touch.




  • Size: 7/16X2-1/2
  • Thread pitch: 7/16-20 UNF
  • Material: medium carbon alloy steel
  • Tensile Strength: 150,000 psi minimum
  • Grade 8 Cap Screws comply with SAE J429, ANSI/ASME B18.2.1 hex cap screws
  • Pack of 50

Technical Data:

  • Tensile: 150,000 psi minimum
  • Hardness: Rockwell Hardness C33-C39
  • Tempering Temperature: 800° F.(minimum)
  • Finish: Zinc Yellow
  • Decarburization: Meets SAE J121
  • Discontinuities: Meets SAE J1061
  • Threads: UNRF and UNRC Radius Root Class 2A to ANSI/ASME B1.1

Rule of thumb to figure bolt thread length:

  • For bolts under 6": Twice the bolt diameter plus a 1/4"
  • For bolts over 6": Twice the bolt diameter plus a 1/2"
  • This gives you the approximate bolt thread length available



MFR: 17678
SKU: 42624455
Brand: Imperial