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Prime-Line 9055821 Hex Lag Screws, 5/16 In. X 4 In., A307 Grade A Zinc Plated Steel (50 Pack)

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Product details

Management number 215618837 Release Date 2026/04/12 List Price $12.90 Model Number 215618837
Category

Lag screw bolts are used in place of standard wood screws whenever the mounting surface must bear a heavy load. The hex head allows for lag screws to be tightened with more torque than can be used on Phillips head screws, though a pilot hole is still required prior to installation. Note that lag screws do not accept nuts as they are technically thick heavy duty wood screws with threads designed to cut into wood. They are ideal for use on decks since installation can be accomplished without having access to both ends of the fastener, as opposed to standard hex bolts that require a nut on the opposite end.

  • Size: 5/16 inch X 4 inch
  • Heavy duty wood screw with 6 sided hex bolt head
  • Features deep wood screw threads and does not accept a nut
  • Used in applications where standard wood screws cannot support the load (deck building, etc.)
  • Requires pilot hole to be drilled and installs using wrench or socket tool
  • Thread Type: Deep, Point Style: Gimlet
  • Specification(s) Met: ASME B18.2.1 and ASTM A307A
UPC 049793131140
Brand PRIME-LINE
Color Zinc
Model 9055821
Head Type Hex
Size Name 5/16 in. -18
Metal Type Zinc,Steel
Unit Count 1.0 Count
Item Weight 0.01 Ounces
Part Number 9055821
Thread Size 5/16"
Thread Type Thread Type
Drive System External Hex
Finish Types Zinc Plated
Manufacturer Prime-Line
Thread Class Others
Thread Style Right Hand
Fastener Size 5/16"
Fastener Type Wood Screws
Item Diameter 0.31 Inches
Material Type Steel
Item Type Name Lag Screw Bolt, Hex Head, 5/16 in X 4 in, Zinc Plated Steel, Pack of 50
Exterior Finish Zinc
Item Dimensions 4 x 4 x 6 inches
Thread Coverage Partially Threaded
Number of Pieces 50
Screw Head Style Hex
Screw Point Style Gimlet
Included Components Lag Screw Bolt
Global Trade Identification Number 00049793131140

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