Structural, Lag & Construction Screws

Structural, lag and construction screws: structural wood screws, washer-head lag screws, timber screws and multi-material construction screws in hex, Torx and star drives, up to 10 in. long. Brands include SPAX (PowerLags, Multi-Material), FastenMaster (HeadLok, FlatLok, LogHog), GRK Fasteners, Grip-Rite and Simpson Strong-Tie.

Structural screws are used in place of lag bolts for ledgers, posts and timber work. For structural connections, follow the maker's spacing and load tables. Part of Screws.

GRK Fasteners 5/16 in. X 6 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

GRK Fasteners 5/16 in. X 6 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

Regular price $2.75 USD

Regular price Sale price $2.75 USD
Unit price per
MSRP $3.33
FastenMaster Headlok 10 in. L Torx Ttap T30 Coarse Structural Wood Screws Box of 250

FastenMaster Headlok 10 in. L Torx Ttap T30 Coarse Structural Wood Screws Box of 250

Regular price $262.68 USD

Regular price Sale price $262.68 USD
Unit price per
MSRP $310.99
FastenMaster Headlok 8 in. L Torx Ttap T30 Coarse Structural Wood Screws 250 pk

FastenMaster Headlok 8 in. L Torx Ttap T30 Coarse Structural Wood Screws 250 pk

Regular price $198.21 USD

Regular price Sale price $198.21 USD
Unit price per
MSRP $253.99
FastenMaster VersaLOK 10 in. L Torx Ttap Galvanized Coarse Structural Wood Screws 50 pk

FastenMaster VersaLOK 10 in. L Torx Ttap Galvanized Coarse Structural Wood Screws 50 pk

Regular price $133.84 USD

Regular price Sale price $133.84 USD
Unit price per
MSRP $159.99
GRK Fasteners 5/16 in. X 4 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

GRK Fasteners 5/16 in. X 4 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

Regular price $1.69 USD

Regular price Sale price $1.69 USD
Unit price per
MSRP $2.03
$1.69 per pack · $84.50 per case of 50
GRK Fasteners 5/16 in. X 6 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

GRK Fasteners 5/16 in. X 6 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

Regular price $48.36 USD

Regular price Sale price $48.36 USD
Unit price per
MSRP $58.66
GRK Fasteners 5/16 in. X 3-1/8 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

GRK Fasteners 5/16 in. X 3-1/8 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

Regular price $22.93 USD

Regular price Sale price $22.93 USD
Unit price per
MSRP $27.79
Grip-Rite No. 8 wire X 1-1/4 in. L Star Flat Head Coarse Construction Screws — 959 pk

Grip-Rite No. 8 wire X 1-1/4 in. L Star Flat Head Coarse Construction Screws — 959 pk

Regular price $26.37 USD

Regular price Sale price $26.37 USD
Unit price per
MSRP $29.99
$26.37 per pack · $158.22 per case of 6
Grip-Rite No. 9 wire X 2-1/2 in. L Star Flat Head Coarse Construction Screws — 1 pk

Grip-Rite No. 9 wire X 2-1/2 in. L Star Flat Head Coarse Construction Screws — 1 pk

Regular price $95.53 USD

Regular price Sale price $95.53 USD
Unit price per
GRK Fasteners 5/16 in. X 5-1/8 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

GRK Fasteners 5/16 in. X 5-1/8 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

Regular price $38.84 USD

Regular price Sale price $38.84 USD
Unit price per
MSRP $47.12
GRK Fasteners 5/16 in. X 5-1/8 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

GRK Fasteners 5/16 in. X 5-1/8 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

Regular price $2.43 USD

Regular price Sale price $2.43 USD
Unit price per
MSRP $2.93
$2.43 per pack · $121.50 per case of 50
GRK Fasteners 5/16 in. X 3-1/8 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

GRK Fasteners 5/16 in. X 3-1/8 in. L Star Climatek W-Cut Structural Wood Screws 1 pk

Regular price $1.44 USD

Regular price Sale price $1.44 USD
Unit price per
MSRP $1.74
$1.44 per pack · $72.00 per case of 50
FastenMaster For MVP/GuardDog Screws 5/16 in. X 2 in. L T-20+ Flat Head Coarse Construction Screws

FastenMaster For MVP/GuardDog Screws 5/16 in. X 2 in. L T-20+ Flat Head Coarse Construction Screws

Regular price $8.88 USD

Regular price Sale price $8.88 USD
Unit price per
MSRP $9.99
GRK Fasteners 3/8 in. in-lb X 8 in. L Star Hex Head W-Cut Structural Screws

GRK Fasteners 3/8 in. in-lb X 8 in. L Star Hex Head W-Cut Structural Screws

Regular price $914.27 USD

Regular price Sale price $914.27 USD
Unit price per
MSRP $1,101.76
GRK Fasteners 3/8 in. X 12 in. L Star Hex Head W-Cut Structural Screws 50 pk

GRK Fasteners 3/8 in. X 12 in. L Star Hex Head W-Cut Structural Screws 50 pk

Regular price $336.45 USD

Regular price Sale price $336.45 USD
Unit price per
MSRP $405.42
GRK Fasteners 3/8 in X 7-1/4 in. L Star Hex Head W-Cut Structural Screws

GRK Fasteners 3/8 in X 7-1/4 in. L Star Hex Head W-Cut Structural Screws

Regular price $147.93 USD

Regular price Sale price $147.93 USD
Unit price per
MSRP $178.20
FastenMaster FlatLok No. 14 each X 4 in. L Torx Ttap Epoxy Coarse Wood Screws 50 pk

FastenMaster FlatLok No. 14 each X 4 in. L Torx Ttap Epoxy Coarse Wood Screws 50 pk

Regular price $44.08 USD

Regular price Sale price $44.08 USD
Unit price per
MSRP $55.49
FastenMaster FlatLok No. 14 X 6 in. L Torx Ttap Epoxy Coarse Wood Screws 250 pk

FastenMaster FlatLok No. 14 X 6 in. L Torx Ttap Epoxy Coarse Wood Screws 250 pk

Regular price $195.28 USD

Regular price Sale price $195.28 USD
Unit price per
MSRP $235.99
FastenMaster FlatLok No. 14 X 2-7/8 in. L Torx Ttap Epoxy Coarse Wood Screws 500 pk

FastenMaster FlatLok No. 14 X 2-7/8 in. L Torx Ttap Epoxy Coarse Wood Screws 500 pk

Regular price $216.56 USD

Regular price Sale price $216.56 USD
Unit price per
MSRP $262.49
FastenMaster FlatLok No. 14 X 4 in. L Torx Ttap Epoxy Coarse Wood Screws 250 pk

FastenMaster FlatLok No. 14 X 4 in. L Torx Ttap Epoxy Coarse Wood Screws 250 pk

Regular price $149.93 USD

Regular price Sale price $149.93 USD
Unit price per
MSRP $182.49
FastenMaster FlatLok No. 14 each X 6 in. L Torx Ttap Epoxy Coarse Wood Screws 1 pk

FastenMaster FlatLok No. 14 each X 6 in. L Torx Ttap Epoxy Coarse Wood Screws 1 pk

Regular price $57.43 USD

Regular price Sale price $57.43 USD
Unit price per
MSRP $69.99
GRK Fasteners 5/16 in. X 6 in. L Star Hex Head W-Cut Structural Screws — Diameter .3125

GRK Fasteners 5/16 in. X 6 in. L Star Hex Head W-Cut Structural Screws — Diameter .3125

Regular price $383.68 USD

Regular price Sale price $383.68 USD
Unit price per
MSRP $462.39
GRK Fasteners 5/16 in. X 5-1/8 in. L Star Hex Head W-Cut Structural Screws 300 pk

GRK Fasteners 5/16 in. X 5-1/8 in. L Star Hex Head W-Cut Structural Screws 300 pk

Regular price $309.15 USD

Regular price Sale price $309.15 USD
Unit price per
MSRP $372.55
SPAX Multi-Material No. 9 in. X 2-1/2 in. L T-20+ Flat Head Serrated Construction Screws

SPAX Multi-Material No. 9 in. X 2-1/2 in. L T-20+ Flat Head Serrated Construction Screws

Regular price $14.41 USD

Regular price Sale price $14.41 USD
Unit price per
MSRP $15.59
FastenMaster Headlok 6 in. L Torx Ttap T30 Coarse Structural Wood Screws Box of 50

FastenMaster Headlok 6 in. L Torx Ttap T30 Coarse Structural Wood Screws Box of 50

Regular price $56.85 USD

Regular price Sale price $56.85 USD
Unit price per
MSRP $61.99
Simpson Strong-Tie Strong-Drive No. 5 Sizes X 4 in. L Star Low Profile Head Bold Structural Screws

Simpson Strong-Tie Strong-Drive No. 5 Sizes X 4 in. L Star Low Profile Head Bold Structural Screws

Regular price $32.36 USD

Regular price Sale price $32.36 USD
Unit price per
SPAX Multi-Material No. 8 Label X 3/4 in. L Unidrive Flat Head Serrated Construction Screws

SPAX Multi-Material No. 8 Label X 3/4 in. L Unidrive Flat Head Serrated Construction Screws

Regular price $3.52 USD

Regular price Sale price $3.52 USD
Unit price per
MSRP $4.79
Hillman Power Pro 5/16 in. X 3-1/2 in. L Star Carbon Steel Lag Screw 1 pk

Hillman Power Pro 5/16 in. X 3-1/2 in. L Star Carbon Steel Lag Screw 1 pk

Regular price $0.79 USD

Regular price Sale price $0.79 USD
Unit price per
MSRP $1.19
$0.79 per pack · $39.50 per case of 50
Hampton 3/8 in. X 6 in. L Zinc-Plated Steel Lag Thread Eyebolt

Hampton 3/8 in. X 6 in. L Zinc-Plated Steel Lag Thread Eyebolt

Regular price $1.16 USD

Regular price Sale price $1.16 USD
Unit price per

$1.16 each · $11.60 per pack of 10
Hampton 5/16 in. X 5 in. L Zinc-Plated Steel Lag Thread Eyebolt

Hampton 5/16 in. X 5 in. L Zinc-Plated Steel Lag Thread Eyebolt

Regular price $0.69 USD

Regular price Sale price $0.69 USD
Unit price per

$0.69 each · $6.90 per pack of 10
Hillman Power Pro 5/16 in. X 8 in. L Star Steel Lag Screw 1 pk

Hillman Power Pro 5/16 in. X 8 in. L Star Steel Lag Screw 1 pk

Regular price $2.51 USD

Regular price Sale price $2.51 USD
Unit price per
MSRP $3.39
$2.51 per pack · $62.75 per case of 25
Hampton 1/4 in. X 3 in. L Zinc-Plated Steel Lag Thread Eyebolt

Hampton 1/4 in. X 3 in. L Zinc-Plated Steel Lag Thread Eyebolt

Regular price $0.41 USD

Regular price Sale price $0.41 USD
Unit price per

$0.41 each · $4.10 per pack of 10
Hillman Power Pro 5/16 in. X 4 in. L Star Steel Lag Screw 1 pk

Hillman Power Pro 5/16 in. X 4 in. L Star Steel Lag Screw 1 pk

Regular price $0.96 USD

Regular price Sale price $0.96 USD
Unit price per
MSRP $1.59
$0.96 per pack · $48.00 per case of 50
Hampton 7/16 in. X 5-1/4 in. L Zinc-Plated Steel Lag Thread Eyebolt

Hampton 7/16 in. X 5-1/4 in. L Zinc-Plated Steel Lag Thread Eyebolt

Regular price $1.57 USD

Regular price Sale price $1.57 USD
Unit price per

$1.57 each · $15.70 per case of 10
Hampton 3/8 in. X 4 in. L Zinc-Plated Steel Lag Thread Eyebolt

Hampton 3/8 in. X 4 in. L Zinc-Plated Steel Lag Thread Eyebolt

Regular price $1.00 USD

Regular price Sale price $1.00 USD
Unit price per

$1.00 each · $10.00 per pack of 10
Hampton 1/4 in. X 3-3/4 in. L Zinc-Plated Steel Lag Thread Eyebolt

Hampton 1/4 in. X 3-3/4 in. L Zinc-Plated Steel Lag Thread Eyebolt

Regular price $0.47 USD

Regular price Sale price $0.47 USD
Unit price per

$0.47 each · $4.70 per pack of 10