Specification:
  • High Tensile Grade 10.9
  • UNC Button Head Socket Cap Screws
  • Allen key drive head
  • Material: Carbon Steel
  • Surface treatment: Black Zinc
  • Size: Thread diameter - pitch * length
  • Screw lengths do not include the head.
  • Size - 1/4" 5/16" 3/8"
  • 1/4":
    20 Thread per inch 
    Head diameter 11mm
    Head thickness 3.2mm (approx.)
    Allen key size 5/64
  • 5/16":
    18 Thread per inch
    Head diameter 13.5mm
    Head thickness 4.0mm (approx.)
    Allen key size 3/32
  • 3/8":
    16 Thread per inch
    Head diameter 16.5mm
    Head thickness 5mm (approx.)
    Allen key size 1/8
Package Including:
  • Please select your size&quantity from the drop down lists above 
About US      
  • We devote oneself to been a excellent supplier of fasteners, hardware and accessories including nuts, bolts, screws, washers, rivets, threaded rod, masonry anchors, tools, and chemicals to the construction, commercial, and manufacturing industries throughout the world.
  • Our products come in a variety of materials including steel, stainless steel, brass, nylon, alloy and galvanized. We stock standard U.S. and metric sizes.
  • We service schools, factories, garages, hospitals, municipalities, R & D labs, home owners, boat owners, construction firms, manufacturing plants, machine fabricators, welders, water treatment plants, boating industry, auto and motorcycle enthusiasts, and many other fields.
  • We always try to offer as much information as possible on our products, if however you have a question you would like answered on any of our products please do not hesitate to contact us.
Price off Policy  If you need Large Quantity, Please Contact with US for the Discount & Wholesale Price
Non-standard customization  Support a variety of non-standard sizes, material customization! Please contact us if necessary.
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