Model # 113221

Internet #203533485

Store SKU #517771

GRK Fasteners 5/16 in. x 3-1/8 in. Rugged Structural Screw (15-Piece per Pack)
0772691132215

GRK Fasteners

5/16 in. x 3-1/8 in. Rugged Structural Screw (15-Piece per Pack)

  • 1 step install, no pre-drilling
  • Superior clamping force on the first drive
  • 20% faster drive time
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Frequently Bought Together

Product Overview

  • 1 step install, no pre-drilling
  • Superior clamping force on the first drive
  • 20% faster drive time
The Rugged Structural Screw (RSS) can be used as a lag screw alternative. The W-Cut and Zip-Tip allows for a quick one step application. With the unique thread design and washer head, the screw helps draw two substrates together while preventing gaps. Climatek corrosion resistant coating is ground contact lumber approved.
  • Zip-Tip eliminates predrilling and one step installation
  • Unique thread design draws two substrates together
  • Washer head allows zero gap joints
  • W-cut low installation torque allows for fast driving and ease of installation
  • CEE thread enlarges hole to reduce splitting, thus eliminating rework
  • ESSR-2442 approved for structural applications
  • Ground contact lumber approved for worry free use in pressure treated lumber
  • Limited Lifetime Warranty

Product Overview

  • 1 step install, no pre-drilling
  • Superior clamping force on the first drive
  • 20% faster drive time
Model #: 113221
Sku #: 517771
Internet #: 203533485

The Rugged Structural Screw (RSS) can be used as a lag screw alternative. The W-Cut and Zip-Tip allows for a quick one step application. With the unique thread design and washer head, the screw helps draw two substrates together while preventing gaps. Climatek corrosion resistant coating is ground contact lumber approved.

  • Zip-Tip eliminates predrilling and one step installation
  • Unique thread design draws two substrates together
  • Washer head allows zero gap joints
  • W-cut low installation torque allows for fast driving and ease of installation
  • CEE thread enlarges hole to reduce splitting, thus eliminating rework
  • ESSR-2442 approved for structural applications
  • Ground contact lumber approved for worry free use in pressure treated lumber
  • Limited Lifetime Warranty

Info & Guides

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Price
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Name #8 x 2-1/2 in. Low Profile Washer-Head Cabinet Screw (100 per Pack) HeadLok 4-1/2 in. Heavy Duty Flathead Fastener - (12-Pack) 5/16 in. x 3-1/8 in. Rugged Structural Screw (45-Piece per Pack) 5/16 in. x 3-1/8 in. Rugged Structural Screw (15-Piece per Pack)
Brand GRK Fasteners FastenMaster GRK Fasteners GRK Fasteners
Ratings (10) (7) (5) (1)
Drive Style Star Star Star Star
Fastener/Connector Material Steel Steel Steel Steel
Size #8 #0 5/16 in 5/16 in
Screw Length 2-1/2 in 4-1/2 in 3-1/8 in 3-1/8 in
Fastener Thread Type W-Cut Coarse CEE Type CEE Type
Head Style Low Profile Washer Flat Round Round
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Specifications

Dimensions

Screw Length
3-1/8 in

Details

ACQ Rated Fastener
Yes
Coated
Y
Drive Style
Star
Driver bit included
No
Fastener Callout Size
5/16 x 3-1/8
Fastener Plating
Polymer
Fastener Thread Type
CEE Type
Fastener Type
Specialty Fastener
Fastener/Connector Material
Steel
Finish
Climatek coated
Finish Family
Metallic
Head Style
Round
Indoor/Outdoor
Indoor/Outdoor
Measurement Standard
SAE
Package Quantity
15
Primary Use
Ledger boards
Product Weight (lb.)
0.04lb
Self drilling
Yes
Self tapping
Yes
Size
5/16 in
Tamper Resistant
No

Warranty / Certifications

Manufacturer Warranty
No

Specifications

Dimensions

Screw Length
3-1/8 in

Details

ACQ Rated Fastener
Yes
Coated
Y
Drive Style
Star
Driver bit included
No
Fastener Callout Size
5/16 x 3-1/8
Fastener Plating
Polymer
Fastener Thread Type
CEE Type
Fastener Type
Specialty Fastener
Fastener/Connector Material
Steel
Finish
Climatek coated
Finish Family
Metallic
Head Style
Round
Indoor/Outdoor
Indoor/Outdoor
Measurement Standard
SAE
Package Quantity
15
Primary Use
Ledger boards
Product Weight (lb.)
0.04lb
Self drilling
Yes
Self tapping
Yes
Size
5/16 in
Tamper Resistant
No

Warranty / Certifications

Manufacturer Warranty
No

Questions & Answers

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Customer Reviews

5/16 in. x 3-1/8 in. Rugged Structural Screw (15-Piece per Pack) is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Really Works! I thought this was too good to be true, but I tried it out anyway, just to see. It works wonderfully for my application, which was mounting a 200 lb capacity rack mount unit to the wall with only two available studs behind drywall. The final weight on the wall, including the rack mount unit and the internal electronic equipment was 168 lbs. I used it instead of the recommended 5/16" lag-bolts-to-studs. It's amazing. You don't have to drill a pilot hole. This screw (lag bolt) drills in like butter and makes its own drill hole whilst the gripping screw flanges come right after (in the same screw). It requires a T-30 bit which excludes any stripping that one might encounter with a regular philips-head. Can't recommend this enough. Really! It's AWESOME!!
Date published: 2015-06-11
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