FastenMaster Deck Screws & Hidden Fasteners

Shop a full line of FastenMaster products. Start with popular FastenMaster Cortex for Deck and FastenMaster Cortex for Trim. And don't forget to check out the FastenMaster Lok line of structural wood screws - FlatLok, HeadLok, LedgerLok, ThruLok and TimberLok are known for strength and reliability. Build with confidence and get the job done right with FastenMaster products.


FastenMaster Cortex Hidden Fastening System for decks and trim is perfect for hiding deck screws in composite, pvc and capstock decking or trim. Choose from Cortex for Trex, Collated Cortex for Azek Trim, Cortex for TimberTech Decking, Cortex for Fiberon, and more.

LOK Line

FastenMaster Lok line are multi-purpose fasteners: FlatLok is used for multi-ply LVL and girder trusses, HeadLok for cabinets, stair stringers, and deck framing, LedgerLok for deck ledger boards, ThruLok for post to joist connections, and TimberLok for fencing and stair stringers.

Deck & Trim Screws

Quality hidden screws wood are essential for a clean deck installation. Select from TrapEase 3 or TrimTop for color matched composite decking, GuardDog for pressure treated decking, or Trio Deck Screws for softwoods.

Specialty Products

FastenMaster has screws for every application. Choose from 7" Gutter Screws to the threaded OlyLog Screws log home fasteners to Heavy Duty Fastenmaster Log Hog with an over-sized head and additional thread count for increased pull-down for warped and twisted logs.

View by Application

Not sure which FastenMaster screws are right for your project? No worries! Shop Fasten Master by application below to select just the right product for the job.