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PHEinox™ RSS™ Stainless Steel Screw

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PHEinox™ Stainless Steel Screws (305 stainless steel grade) are another first from GRK Fasteners. PHEinox™ Screws provide a reasonably priced alternative when only stainless steel will do.

Our special composition of PHE™ stainless steel is one of a kind. It is hardened and rust free and is of the quality you come to expect from GRK products. All of our stainless steel products come with a lifetime warranty against staining and rusting.

Rugged Structural Screw

Made of PHEinox™ hardened Stainless Steel.
Lifetime warranty against staining and rusting.
Self-tapping, W-Cut™ thread design, ZipTip™
May be used for Lag screw replacement.

GRK’s RSS™ Rugged Structural Screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks.

RSS™ screws which are 3"1/8 and longer have a six threaded CEE thread that enlarges the screw hole for the non-threaded portion of the fastener, allowing the wood to settle easily and increasing the screw’s drawing strength. The CEE thread also reduces the likelihood of splitting the wood and the friction on the screw shank which can result in lowering the driving torque.

Our round head with built-in shield (washer type head) has no sharp edges such as on conventional lag screws. The added shoulder (nominal diameter) underneath the washer has the ability to center the RSS™ screw in pre-drilled hardware like hinges and connector plates. Short lengths of the RSS™ may also be used to install wire diamond mesh for stucco buildings.

The #30 Star Drive will deliver approximately 650 lbs of energy, eliminating the need to drill a pilot hole.

The RSS™ screw is the only lag screw replacement of its kind.

RSS™ Structural Screw Test Data

GRK Fasteners utilizes strict quality control procedures. Every batch of screws produced is independently random sampled and quality controlled to the highest standards.

Accreditations for independent test laboratories include:
ICC, CNLA, TÜV, Ü, ISO, DAR.

Tests conducted in Douglas Fir specific gravity 0.5.

Pull Out Test Results for RSS™ Structural Screws     Size Sidegrain: Endgrain: 5/16 x 2"1/2 1740 lbs 1223 lbs 5/16 x 3"1/8 2054 lbs 2321 lbs 5/16 x 4" 2644 lbs 2565 lbs 5/16 x 5"1/8 2745 lbs 2829 lbs 5/16 x 6" 3619 lbs 3522 lbs 3/8  x 7"1/4 3962 lbs 3920 lbs 3/8  x 8" 4364 lbs 4661 lbs 3/8  x 10" 4840 lbs 5104 lbs 3/8  x 12" 5258 lbs 5044 lbs 3/8  x 14"1/8 5306 lbs 5172 lbs 3/8  x 16" 5990 lbs 5753 lbs	Shear Strength Test Results for RSS™ Structural Screws Size Shear Values 5/16 x 2"1/2 829 lbs 5/16 x 3"1/8 847 lbs 5/16 x 4" 1328 lbs 5/16 x 5"1/8 1331 lbs 5/16 x 6" 1335 lbs 3/8  x 7"1/4 1282 lbs 3/8  x 8" 1386 lbs 3/8  x 10" 1504 lbs 3/8  x 12" 1900 lbs 3/8  x 14"1/8 1958 lbs 3/8  x 16" 2065 lbs
Head Pull Through Test Results for RSS™ Structural Screws.  5/16" screws avg. 825 lbs Shaft Diameter 0.198" Head Diameter 0.616" 3/8" screws avg. 889 lbs Shaft Diameter 0.220" Head Diameter 0.711"	Shear Test Result for R4™ Multipurpose Screws Diameter Avg. Ultimate Load (lbs) Wood Failure Rate #4 139 50% #6 301 70% #8 361 30% #9 452 65% #10 687 75% #12 720 75%
Minimum Tensile Strength GRK Spec: 139,000 PSI Code Spec: 45,000 PSI	Minimum Bending Angle GRK Spec: 35° Code Spec: 15°
Bending Yield Moment Test for RSS™ Structural Screws 5/16": 159,073 PSI 3/8": 177,241 PSI	GRK Certifications include: ISO 9001 ICC Ü – German Institute for Building Technology
Test stopped after wood failure or 1/8" screw displacement.
All tests were conducted at independent laboratories in the United States, Germany and Taiwan. Tests were conducted in accordance with ASTM and/or DIN norms. Testing is ongoing and is conducted on every production series. All posted results are Average Ultimate Load Values. For construction design purposes an applicable safety margin should be applied. An architect or engineer should be consulted for this.

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