![GRK Fasteners TOP STAR 20161 Shim Screw, 3/8 in Thread, 3-1/8 in L, Flat Head, Star Drive, Steel, Zinc, 100 BX [SKU: ORG4052445]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/600x600/products/64015/61933/4052445__66756.1683121023.jpg?c=1 "GRK Fasteners TOP STAR 20161 Shim Screw, 3/8 in Thread, 3-1/8 in L, Flat Head, Star Drive, Steel, Zinc, 100 BX [SKU: ORG4052445]")
![GRK Fasteners TOP STAR 20161 Shim Screw, 3/8 in Thread, 3-1/8 in L, Flat Head, Star Drive, Steel, Zinc, 100 BX [SKU: ORG4052445]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/1280x1280/products/64015/61933/4052445__66756.1683121023.jpg?c=1 "GRK Fasteners TOP STAR 20161 Shim Screw, 3/8 in Thread, 3-1/8 in L, Flat Head, Star Drive, Steel, Zinc, 100 BX [SKU: ORG4052445]")
Product Overview
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 labor and allows for hassle free adjustment to ensure plumb installation. [QTY/UOM: 100 / 1PK] [PMS SKU: ] [Category: SCREWS/SCREWS;Shop All]
![GRK Fasteners 10083 Cabinet Screw, #8 Thread, 3-1/8 in L, Washer Head, Star Drive, Steel, 1000 BX [SKU: ORG2816361]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/63958/61876/2816361__74133.1683121006.jpg?c=1 "GRK Fasteners 10083 Cabinet Screw, #8 Thread, 3-1/8 in L, Washer Head, Star Drive, Steel, 1000 BX [SKU: ORG2816361]")
![GRK Fasteners RSS 10287 Structural Screw, 3/8 in Thread, 8 in L, Washer Head, Star Drive, Steel, 300 BX [SKU: ORG2816254]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/63967/61885/2816254__19123.1683121008.jpg?c=1 "GRK Fasteners RSS 10287 Structural Screw, 3/8 in Thread, 8 in L, Washer Head, Star Drive, Steel, 300 BX [SKU: ORG2816254]")
![GRK Fasteners RSS 10221 Structural Screw, 3/8 in Thread, 3-1/8 in L, Washer Head, Star Drive, Steel [SKU: ORG2816247]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/63961/61879/2816247__27408.1683121007.jpg?c=1 "GRK Fasteners RSS 10221 Structural Screw, 3/8 in Thread, 3-1/8 in L, Washer Head, Star Drive, Steel [SKU: ORG2816247]")
![GRK Fasteners 12083 Cabinet Screw, #8 Thread, 3-1/8 in L, Coarse Thread, Washer Head, Star Drive, Steel, Yellow Zinc [SKU: ORG5149786]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/56586/54573/5149786__42644.1683080160.jpg?c=1 "GRK Fasteners 12083 Cabinet Screw, #8 Thread, 3-1/8 in L, Coarse Thread, Washer Head, Star Drive, Steel, Yellow Zinc [SKU: ORG5149786]")
![GRK Fasteners RSS 10137 Structural Screw, #10 Thread, 3-1/8 in L, Washer Head, Star Drive, Steel, 800 BX [SKU: ORG2816296]](https://cdn11.bigcommerce.com/s-er447ou6zb/images/stencil/500x659/products/63959/61877/2816296__78441.1683121006.jpg?c=1 "GRK Fasteners RSS 10137 Structural Screw, #10 Thread, 3-1/8 in L, Washer Head, Star Drive, Steel, 800 BX [SKU: ORG2816296]")