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Home Fasteners Nuts, Bolts, Screws Screws Concrete Screws 376518 5/16IN X 3-1/4IN TAPCON SCREW HEX WASHER 50 COUNT

376518 5/16IN X 3-1/4IN TAPCON SCREW HEX WASHER 50 COUNT

PART 172284
SUPPLIER HILLMAN FASTENERS
SUPPLIER PART # 376518
RANK D
SHELF PACK 1
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About this item

Tapcon® 5/16 in. x 3‑1/4 in. Hex Washer Head Concrete Screws — 50 Count

The Tapcon® 5/16 in. x 3‑1/4 in. Hex Washer Head Concrete Screw is designed for heavy‑duty anchoring into concrete, brick, and hollow block. Featuring a large‑diameter shank and a stable hex‑washer head, this screw delivers the strength, torque control, and reliability needed for industrial, commercial, and structural fastening applications.

Engineered to tap its own threads into masonry, this screw ensures a secure, vibration‑resistant hold while eliminating the need for anchors or sleeves. The added length of 3‑1/4 inches provides compatibility with thicker fixtures and deeper embedment requirements.

Key Features

  • Hex washer head provides strong driver engagement and minimizes cam‑out under load, consistent with verified 5/16 in. Tapcon designs.
  • Large 5/16 in. diameter offers heavy‑duty holding strength suitable for structural applications.
  • Self‑tapping thread design cuts clean threads into concrete, brick, and block for high pull‑out resistance.
  • Extended 3‑1/4 in. length (user-specified) accommodates thicker fixtures and deeper base material penetration.
  • Blue Climaseal® corrosion‑resistant coating is standard across Tapcon heavy‑duty screws and provides long‑lasting protection.
  • No inserts required, enabling fast, direct installation into masonry materials.

Specifications

  • Diameter: 5/16 inch
  • Length: 3‑1/4 inch (custom as provided — no verified catalog match)
  • Head Style: Hex Washer Head
  • Material: Hardened steel
  • Finish: Blue Climaseal® corrosion‑resistant coating
  • Drive Type: Hex (compatible with standard hex nut drivers)
  • Quantity: 50 screws per box (custom; no verified 50‑count pack exists for this size)
  • Installation Substrates: Concrete, brick, block
  • Thread Design: Self‑tapping, masonry‑cutting thread geometry
  • Application Category: Heavy‑duty / structural

Recommended Applications

Suitable for deep‑set, high‑strength anchoring in:

  • Structural framing to concrete
  • Industrial equipment mounting
  • Ledger boards and load‑bearing brackets
  • Utility mounting (conduit straps, electrical boxes, mechanical supports)
  • Heavy shelving, machinery bases, and hangers
  • Interior or exterior masonry fastening where increased length is required

 

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Brand Hillman Fasteners
Length 3-1/4 Inch
Diameter 5/16 Inch
Package Count 50 Package Count
Finish Climaseal
Color Blue
Head Type Hex Washer
Diameter 5/16 Inch
Length 3-1/4 Inch
Head Style Hex Washer Head
Marterial Hardend Steel
Finish Blue Climaseal corrosion resistant coating
Drive Type Hex
Quantity 50 Screws per box
Installation Substrates Concrete, Brick, Block
Thread Design Self-tapping, Masonry-Cutting Thread Geometry
Application Category Heavy-Duty / Structural
UPC Code 038902283757
Shelf Pack 1
Minimum Order Qty 1