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Blulu 400 Pack Trailer Deck Screws, 5/16-18 x 3 in, 2 T40 Bits, Black
✅ In stock
F
Grade
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 22, 2026 5:17 PM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
Diabidazzu
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Must Pre-Drill Before Installation: A guide hole is required for these 5/16-18 screws. Use 1/4 in or 17/64 in according to steel plate thickness. Never force-drive into a metal frame; extreme friction may shear the screw or strip the T40 recess
✓Why The Guide Hole Is Required: Unlike a slimmer 1/4-20 screw, the 5/16-18 shank creates high friction and torque in steel or dense hardwood. Pre-drilling opens shank clearance so the Type F cutting threads can enter smoothly
✓Helps Prevent Installation Damage: Correct guide-hole preparation helps prevent snapped screws, stripped T40 recesses, and split deck boards. Keep the fastener square to the work surface and remove drilling debris before driving
✓Recommended Tools And Torque: Install with an impact driver and a fresh T40 star bit. Use low to medium speed in steel or dense hardwood. Stop as soon as the flat head is flush with the deck board; over-tightening increases stress
✓Wood-To-Metal Trailer Fastening: Flat head Type F thread-cutting screws fasten wood trailer decking to metal frames and sit flush with the board surface. Phosphate-coated alloy steel construction supports trailer floor repair and installation
⚙️ Specifications
Material
Carbon Steel
Head Style
Flat
Item dimensions L x W x H
11.81 x 8.66 x 4.92 inches
Exterior Finish
Black Phosphate
Thread Size
5/16-18x3 Inches
Item Dimensions
11.81 x 8.66 x 4.92 inches
Thread Coverage
Fully Threaded
Fastener Size
5/16-18x3 Inches
Size Name
5/16-18 x 3 Inches
Number of Pieces
400
Outside Diameter
0.31 inches
