https://www.uboltit.com/products/products_detail/5-16-x-7-hex-lag-screw-galvanized/
Hex Lag Screws Galvanized 5/16 X 7 - Hex Lag Screws| U-Bolt-It
At U-Bolt-It, we supply fasteners made to meet all of your requirements including your size 5/16 X 7, Galvanized, Carbon Steel Hex Lag Screws.
lag screwsu bolthexgalvanized
https://www.shaverhillmaple.com/products/lab-bolt-with-insulator?shpxid=72a3ec70-cb28-42f7-9495-fbcb1d9c3928
Lag Bolt with Insulator – Shaver-Hill Maple Farm
Mount directly in end tree for a quick wire installation
lag boltinsulatorshaverhillmaple
https://www.kgnutsandbolts.com/38--7-X-10-HEX-LAG-SCREW-ZP_p_164931.html
Bolt Products - 3/8"-7x10" Hex Lag Screw Low Carbon Zinc Cr+3 From KG Nuts-Bolts & Supply Co.
BUY Bolt Products - 3/8
lag screwlow carbonboltproductshex
https://solexpower.ca/paulin-hex-head-lag-bolt-5-16-3-zinc-plated-100-pack/
Paulin Hex Head Lag Bolt 5/16" × 3" – Zinc Plated – 100 Pack
Paulin 5/16" × 3" hex head zinc-plated lag bolts for wood and construction applications. Durable, corrosion-resistant, secure fastening, 100 pack.
hex headlag boltzinc platedpaulinpack