Our Products

Home Our Products PHEINOX™ RSS™ Stainless Steel Screw

PHEINOX™ RSS™ Stainless Steel Screw

-- patented --

View our RSS™ Promotional Video

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 lbf 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 lbf 1223 lbf 5/16 x 3"1/8 2054 lbf 2321 lbf 5/16 x 4" 2644 lbf 2565 lbf 5/16 x 5"1/8 2745 lbf 2829 lbf 5/16 x 6" 3619 lbf 3522 lbf 3/8  x 7"1/4 3962 lbf 3920 lbf 3/8  x 8" 4364 lbf 4661 lbf 3/8  x 10" 4840 lbf 5104 lbf 3/8  x 12" 5258 lbf 5044 lbf 3/8  x 14"1/8 5306 lbf 5172 lbf 3/8  x 16" 5990 lbf 5753 lbf	Shear Strength Test Results for RSS™ Structural Screws Size Shear Values 5/16 x 2"1/2 829 lbf 5/16 x 3"1/8 847 lbf 5/16 x 4" 1328 lbf 5/16 x 5"1/8 1331 lbf 5/16 x 6" 1335 lbf 3/8  x 7"1/4 1282 lbf 3/8  x 8" 1386 lbf 3/8  x 10" 1504 lbf 3/8  x 12" 1900 lbf 3/8  x 14"1/8 1958 lbf 3/8  x 16" 2065 lbf
Head Pull Through Test Results for RSS™ Structural Screws.  5/16" screws avg. 825 lbf Shaft Diameter 0.198" Head Diameter 0.616" 3/8" screws avg. 889 lbf Shaft Diameter 0.220" Head Diameter 0.711"	Shear Test Result for R4™ Multipurpose Screws Diameter Avg. Ultimate Load (lbf) 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.

View Price List
View Selection Guide
Download This Catalog Page