316, US, External hex

US Fasteners

Hex bolt

Hex bolts

Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.
Lag bolt

Lag bolts

Large wood screws technically called lag screws.
SimpsonĀ® SDWH Timber hex HDG screws

Deck screws & Timber screws

Screws for wood to wood fastening applications such as decks, docks, and ledgers, etc.