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Home Fasteners Nuts, Bolts, Screws Screws Structural - Ledger Screws WSWH358-EXTR12 1/4IN X 3-5/8IN WASHER HEAD STRUCT WOOD SCREW

WSWH358-EXTR12 1/4IN X 3-5/8IN WASHER HEAD STRUCT WOOD SCREW

PART 644373
SUPPLIER USP STRUCTURAL CONNE
SUPPLIER PART # WSWH358-EXTR12
RANK D
SHELF PACK 10
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About this item

WSWH358-EXTR12 Washer Head Structural Wood Screw – ¼″ × 3-5/8″ Exterior Grade

Product Overview

The WSWH358-EXTR12 is a heavy-duty structural wood screw designed for exterior applications requiring superior strength and secure fastening. Its washer-style head provides extra bearing surface for maximum load distribution, while the corrosion-resistant coating ensures long-lasting durability in outdoor environments.

Key Features

  • Washer Head Design – Offers strong clamping force and prevents pull-through
  • Self-Drilling Type 17 Point – Eliminates pre-drilling and reduces wood splitting
  • Exterior-Grade Triple Zinc Coating – Protects against rust and corrosion
  • High-Strength Alloy Steel – Delivers exceptional shear and withdrawal performance
  • Length Stamped on Head – Quick identification during installation
  • Optimized Thread Design – Ensures strong grip and reduced installation torque

Specifications

Specification Details
Model WSWH358-EXTR12
Diameter ¼″ (0.25″)
Length 3-5/8″
Head Type Washer Head
Drive Type T-30 Star Drive (Torx)
Point Type Type 17 self-drilling
Material High-strength alloy steel
Finish Triple zinc coating (exterior rated)

Applications

Ideal for structural and outdoor projects, including:

  • Deck framing and ledger connections
  • Beam-to-post assemblies
  • Exterior timber joints and pergolas
  • Fencing and garden structures
  • Subfloor and heavy-duty framing

Benefits

  • Secure Load Distribution – Washer head design prevents pull-through
  • Fast Installation – No pre-drilling required
  • Corrosion Resistance – Triple zinc finish for outdoor durability
  • Strong Structural Performance – Meets demanding load requirements

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Brand USP Structural Connectors
Length 3-5/8 Inch
Diameter 1/4 Inch
Finish Yellow Zinc Coating
ACQ Approved No
ANSI Safety Listing No
Collated No
Diameter 1/4 in
Diameter (Inches) 0.148
Drive Size T30
Gauge 9
Grade 5
Head Type Washer Flat
Interior/Exterior Interior/Exterior
Length Measurement 1-1/2-in
Manufacturer Color/Finish Silver
Material Steel
Nail Length (Inches) 1.5
Overall Length 3-5/8 in
Package Quantity 5
Package Unit of Measurement Pound(s)
Shank Type Smooth
Type Structural Type 17 Point
Warranty Limited lifetime
UPC Code 081942149651
Shelf Pack 10
Minimum Order Qty 1
Supplier Name USP Structural Connectors
Supplier Short Name USP Struct
Supplier Address 1 No Address
Country US
Supplier Email jeff.maassen@mii.com
Supplier Url www.uspconnectors.com
Buyer Name Jason Monroe
Supplier Phone (800) 328-5934
Supplier Fax (952) 898-8605
Our Customer Id U3710
Also Known As MiTek USA
Drop Ship Ppd Freight $1500
Drop Ship Order Min No Min
Return Policy Call Factory
Product Lines Structural Hangers and Connectors
Rep Name Jeff Maassen
Rep Address Bentley Storme Muse @ Factory BMuse@mii.com
Rep Phone (314) 851-8535
Rep Email jeff.maassen@mii.com