[20 PKG] Lag Screws Hex 316 Stainless Steel 5/16 X 3-1/2

Mutual ScrewSKU: 3156L316YW

Price:
Sale price$159.65per 20( $7.98 each)
Pieces 20
Measurement type Inch
Thread size 5/16
Diameter 5/16
Length 3-1/2
Material Steel
Grade 316
Finish Stainless Steel
Head style Hex
Threads per inch 9
Thread style Partially Threaded
Weight 2.0 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Lag Screws Hex 316 Stainless Steel 5/16 X 3-1/2" are heavy-duty fasteners designed for demanding outdoor and marine settings. Built from 316 stainless steel, they resist corrosion, staining, and rust in harsh environments, making them ideal for decks, fences, docks, and other exterior installations.

The hex head provides high torque transfer and easier driving with a compatible bit, while the lag screw thread design creates a secure hold in wood and other timber substrates. Sized at 5/16" diameter by 3-1/2" length, these lag screws are long enough to bite deeply into studs, posts, or heavy timbers for reliable anchoring.

Key features

  • Material: 316 stainless steel for superior corrosion resistance in salt air and wet environments
  • Size: 5/16" diameter x 3-1/2" length
  • Head type: Hex lag screw head for high torque driving
  • Application: Ideal for outdoor structures, marine installations, and other timber fastenings

Why choose 316 stainless steel lag screws?

316 stainless steel offers excellent resistance to rust and staining from exposure to moisture, chlorides, and chemicals. This makes these lag screws a durable choice for decks, fences, marinas, bulkheads, and other exterior projects where standard stainless or carbon steel fasteners would corrode over time.

Usage tips

  • Pre-drill pilot holes to prevent timber cracking and ensure precise alignment.
  • Use a compatible hex driver to achieve full drive without stripping the head.
  • Avoid over-tightening to prevent timber damage and ensure optimal holding power.

Can We Help?

If you’re not sure that this product is right for you, give us a call!
800-222-0324

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