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GRK Fasteners 3/8 in. X 10 in. L Star Washer Head Self Tapping Structural Screws

Heavy-duty 3/8x10 in. structural screws with a weather-ready Climacoat finish for framing, decking, and beam connections that need to hold.
Grk Fasteners MPN 12293 In Stock & Ready to Ship
$329.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

These GRK structural screws are built for the connections that actually hold a structure together—ledger boards, beams, posts, and heavy timber framing where a standard wood screw won't cut it. At 3/8 in. diameter and 10 in. long, they've got the mass to bite deep into engineered lumber and dimensional framing alike, and the W-Cut thread design is engineered to reduce splitting and cut in cleanly without a pilot hole in most applications.

The Climacoat finish stands up to moisture, so these work as well on an outdoor deck frame or ledger as they do inside a wall assembly. A star drive hex head paired with the included driver bit means fewer stripped heads and a more confident grip when you're driving fasteners into dense or engineered wood. Each box holds 50 screws in a clamshell pack, giving you enough for a real framing or deck-building job without buying in bulk.

  • Callout size: 3/8 in. diameter
  • Length: 10 in.
  • Material: Steel with Climacoat finish
  • Drive style: Star, hex head, driver bit included
  • Thread: W-Cut, self-tapping (not self-drilling)
  • Rated for indoor and outdoor use; 50 per box

The Details Specifications

Brand Grk Fasteners
Model / MPN 12293
UPC 772691122933
Weight 6 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
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01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

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03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

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