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Top Star™ Adjustable Shim

GRK’s adjustable TOP STAR™ shim screw, is in fact a screw within a screw that allows you to install wooden doors or windows without the use of shims.  The quick and easy system reduces labour and allows for hassle free adjustment to ensure plumb installation.

Quick info

SKU: TopStarShimScrew Category:

For Plumb Installation of Wooden Doors and Windows.

Our product is suited to meet the needs of both professional contractors and weekend warriors making the job easier for one person.  Fine adjustments are as simple as the turn of a screw, even after years of use and settling.

ADVANTAGES

  • Recessed Star Drive: Zero Stripping, with 6 points of contact.
  • 4-point 3/8″ diameter Threaded Sleeve provides a secure hold on your wooden frame.
  • Micro-Adjustments allow for an absolutely plumb installation.
  • Use with GRK’s Top Star™ Crown and T-15 Star bit system.
  • White Zinc Plated finish for lasting durability.
  • For Shim Free installation of wooden doors, windows, insulation, paneling, built-in wall units and cabinets.
  • Includes (1) Crown / Bit with each

Product Selection

U.S. (STD.) SIZE
(DIA. X LENGTH)
METRIC SIZE
(DIA. X LENGTH)
BULK
PART NO.
BULK
BOX QTY.
BLISTER-PAK
PART NO.
BLISTER-PAK
QTY.
3/8" x 2-1/2"6.0 x 6320157100240506
3/8" x 3-1/8"6.0 x 8020161100241006
  • Quality Policy
    It is the policy of GRK Fasteners Ltd. to provide top quality fasteners that require no predrilling, suitable for all applications and provide strength and finishing that customers and construction codes require.

    GRK Fasteners (“GRK”) warrants to the first retail purchaser that its Climatek™ coated will not rust under normal environmental conditions when used in accordance with the recommendations listed in GRK’s Screw Selection Guide for the life of your project.

    This warranty is not transferable.

    GRK is not responsible for product failure caused by the improper use or installation of its own or other building materials. The warranty does not cover damage as a result of alteration, accident, misuse, neglect, reuse, warn building materials or use not in accordance with the Screw Selection Guide.

    The warranty is limited to the replacement of defective screws only.

    To obtain service under this warranty, the original purchaser must return defective screws, photos of the project in which failure occurred, and purchase receipt from the retailer at which the screws were bought to:

    GRK Fasteners Canada
    ITW Construction Products Canada
    120 Travail Road, Markham, ON L3S 3J1
    Tel: 1-800-387-6472