Screw Selection Guide
coated screws have been independently
tested and approved for use in treated
wood products. Our fasteners come with a
Limited Lifetime Warranty. For best
performance use PHEINOXTM stainless
screws by GRK.
Always build your project
according to current ICC (International
Code Council) specifications. GRK's ClimatekTM
coating meets and exceeds all standards,
including AC257, for various types of
wood. Please view ICC Report # ESR-2442
and ICC Report # ESR-3201.
No pre-drilling for most GRK products,
except where building material limitations
require. Always place deck boards with
outer edge of growth rings facing up (bark
side up). Do not use deck cleaners which
contain bleach with coated metals. Consult
recommendations. Decking screws should be
GRK recommends the
use of its PHEINOXTM
stainless steel fasteners in tropical
wood, cedar wood, pool, sauna and
sea-side applications, as well as deck
applications in areas with large daily
Multi Purpose Screw: Multi-use
screw for wood, particle board,
plastic, Sheet metal, cement
fiber board and wood decking.
Comes in 59 sizes: 4 x 3/8” to
12 x 12". The R4TM
is self-tapping with a
countersinking head, patented
head & thread, no
pre-drilling, no stripped heads
and exclusive CEE thread.
Structural Screw: Ideal
for ledger boards and more.
Available in 41 sizes from
1”1/2 to 20". The RSSTM
has sharp threads &
points, built-in washer, CEE
and ICC Report ESR-2442.
JTS Joist &Truss Fastener:
Used for joists and trusses.
LPS Panel Fastener: For
Structural Insulated Panel
LTF Timber Frame Fastener:
Designed specifically for the
Log Home &Timber frame
Head Screws: Comes
in 11 sizes ranging from 1"1/4
to 5" in length with the
smallest screw head available.
These screws are for all trim
applications, no pre-drilling,
have strong heads & starhead
Finish carpentry screw.
Use in classic composite
Head Screws are also available
in White for synthetic trim
in plastic or composite decking.
comes in six colors: Grey, Sage,
Sand, Tan, Brown and Redwood.
Available in 4 lengths: 1”3/4,
2"1/2, 2"3/4 and 3"1/8. The
has fiber trapping rings, CEE
thread, is self-tapping and