Steel Carriage Bolt, Grade 5, Zinc Plated Finish, Square Neck, Round Head, Meets ASME B18.5/SAE J429, 3-1/2" Length, Fully Threaded, 5/16"-18 UNC Threads (Pack of 50)

★★★★★ 4.4 138 reviews

$42.23
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Management number 215646640 Release Date 2026/04/12 List Price $16.89 Model Number 215646640
Category

The grade 5 steel carriage bolt with zinc-plated finish has a square neck with round head and meets American Society of Mechanical Engineers ASME B18.5 and Society of Automotive Engineers J429 specifications. Grade 5 steel, composed of quenched and tempered medium carbon steel, is often used in applications where strength is the primary consideration. The zinc plating offers corrosion resistance and has a reflective appearance. The square neck prevents the bolt from turning once installed, even when a nut is tightened. The round head has a domed shape.Carriage bolts, also called round head square neck bolts, are square-necked threaded fasteners commonly used in wood fastening applications. The bolt’s square neck prevents it from turning once installed using a nut.

  • Grade 5 steel is often used in applications where strength is the primary consideration
  • Zinc plating resists corrosion and has a reflective appearance
  • Square neck prevents the bolt from turning once installed, even when a nut is tightened
  • Round head has a domed shape
  • Meets ASME B18.5 and SAE J429 specifications
UPC 082893333861
Brand Small Parts
Color zinc
Model 492023
Size Name 5/16"-18
Unit Count 50.0 Count
Item Weight 0.01 Ounces
Part Number B009YAPMKA
Thread Size 5/16"-18
Thread Type Unc
Drive System Square
Grade Rating Grade 5
Manufacturer Brighton Best
Thread Class 2A
Thread Style Right Hand
Fastener Size #10-12
Fastener Type Carriage Bolt
Item Hardness Grade 5
Material Type Alloy Steel
Exterior Finish Zinc
Item Dimensions 3.5 inches
Thread Coverage Fully Threaded
Screw Head Style Round
Manufacturer Grade Grade 5

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