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Timberline Fasteners

Lag Wood Screws, Flat Head — 3/8 in. Dia. x 6 in. L, 250-Pack

Mfg.#
2191-3454
Sku#
8911240
  • 3/8-inch lag screw replacement
  • No pre-drilling
  • Flat head provides great finished look
  • The SpiderDrive System contains eight points of contact, maximizing bit fit and reducing stripping.
  • Sharp gimlet point for fast installation into wood and OSB

* Estimated stock levels as of Sat, Apr 11, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.

Description

These 6-Inch Headlok Wood Screws are heavy-duty lag wood screws designed for strong, reliable connections when building decks, framing, or fastening large timbers. At 3/8-inch diameter and 6 inches long, their aggressive threads deliver excellent holding and withdrawal strength, while the sharp gimlet point drives quickly into wood and OSB without the need for pre-drilling. The flat head provides a clean finished look when countersunk, and the SpiderDrive System with eight points of contact maximizes bit fit and reduces stripping for smoother installation. A SpiderDrive bit is supplied to get you started. Use them for structural carpentry tasks, securing ledger boards, or any application where long, high-strength wood fasteners are required.

Specifications

General

Head Style Spider Drive
Pack Qty 250
Point Type Gimlet
Type Lag Wood Screw

Dimensions

Diameter 3/8 in
Length 6 in

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