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GRK Fasteners 5/16 or No. 15 in. X 5-1/8 in. L Star Black W-Cut Structural Wood Screws

Self-drilling W-Cut thread bites into wood fast, backed by a Climatek finish that shrugs off indoor or outdoor exposure.
Grk Fasteners MPN 95511 In Stock & Ready to Ship
$149.50
$2.99 each · sold by the case of 50 Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days
Cases of 50 · Order in multiples of 50

Sold by the Case

$149.50 per case of 50

Save $22.50 on orders $75+. Spend $75 or more to unlock 15% off every case — applied automatically at checkout. Free shipping at $75.

Ships as a complete case of 50. Free shipping on orders $75 and up.

About Product Overview

This GRK structural wood screw is built for jobs that carry real load: deck framing, ledger boards, timber connections, and other heavy wood-to-wood fastening. The W-Cut thread and self-drilling tip bite in fast without a pilot hole, and the star drive keeps the bit seated so you're not stripping heads mid-drive. Climatek finish holds up whether the project is inside or out in the weather.

  • Callout size: 5/16", Length: 5-1/8"
  • Head type: Washer head for solid bearing surface
  • Drive style: Star, self-drilling steel construction
  • Climatek finish rated for indoor and outdoor use

The Details Specifications

Brand Grk Fasteners
Model / MPN 95511
UPC 092097955110
Weight 3 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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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

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Grk Fasteners. A third-party marketplace seller usually isn't.

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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The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Grk Fasteners

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