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.

Grip-Rite No. 10 wire X 4 in. L Phillips Bugle Head Coarse Construction Screws

Grip-Rite No. 10 wire X 4 in. L Phillips Bugle Head Coarse Construction Screws

Regular price $5.99 USD

Regular price Sale price $5.99 USD
Unit price per
MSRP $8.99
$5.99 each · $71.88 per pack of 12
Grip-Rite No. 10 in. X 3-1/2 in. L Star Flat Head Coarse Construction Screws

Sold out

Grip-Rite No. 10 in. X 3-1/2 in. L Star Flat Head Coarse Construction Screws

Regular price $6.03 USD

Regular price Sale price $6.03 USD
Unit price per
MSRP $8.99
$6.03 each · $72.36 per pack of 12

Sold out
FastenMaster TimberLok 8 in. L Hex E-Coat Coarse Structural Wood Screws 50 pk

FastenMaster TimberLok 8 in. L Hex E-Coat Coarse Structural Wood Screws 50 pk

Regular price $55.83 USD

Regular price Sale price $55.83 USD
Unit price per
MSRP $68.49
Grip-Rite Pro-Twist No. 8 wire X 1 in. L Phillips Truss Head Fine Construction Screws

Grip-Rite Pro-Twist No. 8 wire X 1 in. L Phillips Truss Head Fine Construction Screws

Regular price $10.64 USD

Regular price Sale price $10.64 USD
Unit price per
MSRP $15.99
$10.64 each · $127.68 per pack of 12
FastenMaster TimberLok 10 in. L Hex E-Coat Coarse Structural Wood Screws 50 pk

FastenMaster TimberLok 10 in. L Hex E-Coat Coarse Structural Wood Screws 50 pk

Regular price $62.20 USD

Regular price Sale price $62.20 USD
Unit price per
MSRP $74.99
Grip-Rite No. 9 in. X 3 in. L Star Flat Head Coarse Construction Screws — 363 pk

Grip-Rite No. 9 in. X 3 in. L Star Flat Head Coarse Construction Screws — 363 pk

Regular price $29.53 USD

Regular price Sale price $29.53 USD
Unit price per

$29.53 per pack · $177.18 per case of 6
SPAX Multi-Material No. 10 in. X 3 in. L T-20+ Wafer Head Serrated Construction Screws

SPAX Multi-Material No. 10 in. X 3 in. L T-20+ Wafer Head Serrated Construction Screws

Regular price $15.87 USD

Regular price Sale price $15.87 USD
Unit price per
SPAX MDF No. 8 in. X 1-3/4 in. L T-20+ Trim Head Serrated Construction Screws

Sold out

SPAX MDF No. 8 in. X 1-3/4 in. L T-20+ Trim Head Serrated Construction Screws

Regular price $17.40 USD

Regular price Sale price $17.40 USD
Unit price per
MSRP $20.39

Sold out
SPAX PowerLag 5/16 in. X 3.5 in. L T-40 Washer Head Serrated Structural Screws

SPAX PowerLag 5/16 in. X 3.5 in. L T-40 Washer Head Serrated Structural Screws

Regular price $15.85 USD

Regular price Sale price $15.85 USD
Unit price per
MSRP $19.79
Grip-Rite No. 9 wire X 3 in. L Star Flat Head Coarse Construction Screws — Model 3GCS25BK

Grip-Rite No. 9 wire X 3 in. L Star Flat Head Coarse Construction Screws — Model 3GCS25BK

Regular price $97.07 USD

Regular price Sale price $97.07 USD
Unit price per
SPAX PowerLag 5/16 in. X 3 in. L T-40 Washer Head Serrated Structural Screws

SPAX PowerLag 5/16 in. X 3 in. L T-40 Washer Head Serrated Structural Screws

Regular price $14.85 USD

Regular price Sale price $14.85 USD
Unit price per
MSRP $18.69
SPAX PowerLag 1/4 in. X 5 in. L T-30 Washer Head Serrated Structural Screws

Sold out

SPAX PowerLag 1/4 in. X 5 in. L T-30 Washer Head Serrated Structural Screws

Regular price $14.89 USD

Regular price Sale price $14.89 USD
Unit price per
MSRP $22.19

Sold out
FastenMaster FrameFast 6 in. L Torx Ttap Bold Structural Wood Screws 250 pk

FastenMaster FrameFast 6 in. L Torx Ttap Bold Structural Wood Screws 250 pk

Regular price $152.99 USD

Regular price Sale price $152.99 USD
Unit price per
SPAX PowerLag 1/4 in. X 6 in. L T-30 Washer Head Serrated Structural Screws

Sold out

SPAX PowerLag 1/4 in. X 6 in. L T-30 Washer Head Serrated Structural Screws

Regular price $21.08 USD

Regular price Sale price $21.08 USD
Unit price per
MSRP $23.39

Sold out
SPAX PowerLags 1/4 in. X 6 in. L Washer Yellow Zinc Carbon Steel Lag Screw 12 pk

SPAX PowerLags 1/4 in. X 6 in. L Washer Yellow Zinc Carbon Steel Lag Screw 12 pk

Regular price $15.84 USD

Regular price Sale price $15.84 USD
Unit price per
MSRP $18.69
SPAX Multi-Material No. 10 in. X 3-1/2 in. L T-20+ Flat Head Serrated Construction Screws

SPAX Multi-Material No. 10 in. X 3-1/2 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
SPAX Multi-Material No. 10 in. X 3 in. L T-20+ Flat Head Serrated Construction Screws

SPAX Multi-Material No. 10 in. X 3 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
SPAX PowerLags 1/4 in. X 3 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

SPAX PowerLags 1/4 in. X 3 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

Regular price $10.12 USD

Regular price Sale price $10.12 USD
Unit price per
SPAX PowerLags 5/16 in. X 4-1/2 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

SPAX PowerLags 5/16 in. X 4-1/2 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

Regular price $17.75 USD

Regular price Sale price $17.75 USD
Unit price per
MSRP $22.19
SPAX PowerLags 1/4 in. X 2 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

SPAX PowerLags 1/4 in. X 2 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

Regular price $9.92 USD

Regular price Sale price $9.92 USD
Unit price per
SPAX Multi-Material No. 8 in. X 2 in. L T-20+ Flat Head Serrated Construction Screws

SPAX Multi-Material No. 8 in. X 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
SPAX PowerLag 1/4 in. X 3 in. L T-30 Washer Head Serrated Structural Screws

SPAX PowerLag 1/4 in. X 3 in. L T-30 Washer Head Serrated Structural Screws

Regular price $12.16 USD

Regular price Sale price $12.16 USD
Unit price per
MSRP $17.49
FastenMaster HeadLok 6 in. L Torx Ttap Coarse Wood Screws 250 pk

FastenMaster HeadLok 6 in. L Torx Ttap Coarse Wood Screws 250 pk

Regular price $189.99 USD

Regular price Sale price $189.99 USD
Unit price per
MSRP $225.99
SPAX Multi-Material No. 8 in. X 2 in. L T-20+ Wafer Head Serrated Construction Screws

SPAX Multi-Material No. 8 in. X 2 in. L T-20+ Wafer Head Serrated Construction Screws

Regular price $15.87 USD

Regular price Sale price $15.87 USD
Unit price per
SPAX PowerLag 1/4 in. X 3-1/2 in. L T-30 Washer Head Serrated Structural Screws

SPAX PowerLag 1/4 in. X 3-1/2 in. L T-30 Washer Head Serrated Structural Screws

Regular price $12.37 USD

Regular price Sale price $12.37 USD
Unit price per
MSRP $18.69
FastenMaster Headlok 10 in. L Torx Ttap T30 Coarse Structural Wood Screws 12 pk

FastenMaster Headlok 10 in. L Torx Ttap T30 Coarse Structural Wood Screws 12 pk

Regular price $24.64 USD

Regular price Sale price $24.64 USD
Unit price per
MSRP $30.99
SPAX PowerLags 5/16 in. X 4 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

SPAX PowerLags 5/16 in. X 4 in. L Washer High Corrosion Resistant Carbon Steel Lag Screw 12 pk

Regular price $13.99 USD

Regular price Sale price $13.99 USD
Unit price per
MSRP $21.09
SPAX PowerLags 1/4 in. X 3 in. L T-30 Washer Head Serrated Construction Screws

Sold out

SPAX PowerLags 1/4 in. X 3 in. L T-30 Washer Head Serrated Construction Screws

Regular price $9.17 USD

Regular price Sale price $9.17 USD
Unit price per
MSRP $13.99

Sold out
SPAX MDF No. 8 in. X 2-1/2 in. L T-20+ Trim Head Serrated Construction Screws

SPAX MDF No. 8 in. X 2-1/2 in. L T-20+ Trim Head Serrated Construction Screws

Regular price $17.40 USD

Regular price Sale price $17.40 USD
Unit price per
MSRP $20.39
SPAX Truss No. 14 Label X 6-1/4 in. L Star Round Head Serrated Construction Screws

SPAX Truss No. 14 Label X 6-1/4 in. L Star Round Head Serrated Construction Screws

Regular price $34.56 USD

Regular price Sale price $34.56 USD
Unit price per
MSRP $42.59
SPAX PowerLags 1/4 in. X 6 in. L T-30 Washer Head Serrated Structural Screws

Sold out

SPAX PowerLags 1/4 in. X 6 in. L T-30 Washer Head Serrated Structural Screws

Regular price $47.83 USD

Regular price Sale price $47.83 USD
Unit price per

Sold out
SPAX Multi-Material No. 8 in. X 1-1/2 in. L T-20+ Flat Head Serrated Construction Screws

SPAX Multi-Material No. 8 in. X 1-1/2 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
SPAX MDF No. 6 in. X 1-1/2 in. L Star Trim Head Serrated Construction Screws

Sold out

SPAX MDF No. 6 in. X 1-1/2 in. L Star Trim Head Serrated Construction Screws

Regular price $17.40 USD

Regular price Sale price $17.40 USD
Unit price per
MSRP $20.39

Sold out
FastenMaster HeadLok 2-7/8 in. L Torx Ttap Coarse Structural Wood Screws — Model FMHLGMTT278-500

FastenMaster HeadLok 2-7/8 in. L Torx Ttap Coarse Structural Wood Screws — Model FMHLGMTT278-500

Regular price $176.76 USD

Regular price Sale price $176.76 USD
Unit price per
MSRP $231.49
SPAX PowerLags 5/16 in. X 4 in. L T-40 Washer Head Serrated Structural Screws

SPAX PowerLags 5/16 in. X 4 in. L T-40 Washer Head Serrated Structural Screws

Regular price $41.13 USD

Regular price Sale price $41.13 USD
Unit price per
MSRP $46.69
GRK Fasteners 5/16 in. X 4 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

GRK Fasteners 5/16 in. X 4 in. L Star Climatek W-Cut Structural Wood Screws 25 pk

Regular price $24.85 USD

Regular price Sale price $24.85 USD
Unit price per
MSRP $30.11