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Prime-Line 9063837 Carriage Bolts, 3/8 in.-16 X 4 in., A307 Grade A Hot Dip Galvanized Steel (25 Pack)

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Product details

Management number 218166346 Release Date 2026/05/03 List Price $8.42 Model Number 218166346
Category

Prime‑Line carriage bolts provide strong, dependable fastening for wood‑to‑wood or wood‑to‑metal applications commonly found in home improvement and repair projects. Featuring a smooth, rounded head with a square neck, these bolts are designed to prevent turning during installation and deliver a clean, finished appearance on visible surfaces. Ideal for use in outdoor furniture, decks, fencing, gates, signage, and structural assemblies, Prime‑Line carriage bolts are intended for use with same‑size matching nuts and washers to ensure proper fit, improved load distribution, and a secure long‑lasting hold. Manufactured from quality materials for durability and corrosion resistance, they install easily with standard tools and perform reliably in both indoor and outdoor environments. Trusted by DIY homeowners and professionals across the U.S., Prime‑Line carriage bolts make it easy to complete projects with strength, stability, and a professional finish.

  • Size: 3/8 inch-16 X 4 inch
  • Features a smooth rounded head as opposed to a standard hex head
  • Square shoulder allows for nut to be tightened or loosened
  • Often used in cases where a protruding bolt head could cause injury
  • Nuts and washers not included, ensure washers and nuts are same diameter
  • Thread Type: Coarse, Thread Class: UNC-2A, Point Style: Blunt
  • Specification(s) Met: ASME B18.5 and ASTM A307A
UPC 049793116291
Brand PRIME-LINE
Color Zinc
Model 9063837
Set Name 25 Pack
Head Type Domed
Size Name 3/8 in. -16
Metal Type Hot Dip Galvanized Steel
Unit Count 1.0 Count
Part Number 9063837
Thread Size 3/8"-16
Thread Type Unc
Drive System Square
Finish Types Hot-Dipped Galvanized
Grade Rating Grade A
Manufacturer Prime-Line
Thread Class Others
Thread Style Right Hand
Fastener Size 3/8"
Fastener Type Carriage Bolt
Item Diameter 0.38 Inches
Item Hardness Grade 2
Material Type Alloy Steel
Item Type Name Carriage Bolt, 3/8 in-16 X 4 in, Galvanized Steel, Pack of 25
Exterior Finish Hot-Dipped Galvanized
Item Dimensions 4 x 4 x 4 inches
Number Of Items 25
Thread Coverage Fully Threaded
Number of Pieces 25
Screw Head Style Domed
Screw Point Style Blunt
Manufacturer Grade Grade A
Included Components Carriage Bolt
Compatible Groove Diameter 0.38 Inches
Global Trade Identification Number 00049793116291

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