SteelBlack Phosphate
3724FTFB-1000
3/8"-16 x 1 1/2" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$215.28 – $560.63
Bulk Box (1,000 pcs)
$560.63
Trailer Deck Screws
38 products
Flat-head Type F trailer deck screws (also called floorboard screws) cut machine threads into steel trailer crossmembers. They are self-tapping thread-cutting screws: a blunt Type F point with tapered lead threads needs a pre-drilled pilot hole. They do not drill their own hole.
Every size on this page is a flat countersunk head with a 6-lobe drive, case-hardened carbon steel, and a black phosphate finish. Threads are UNC machine threads in #10-24, 1/4"-20, 5/16"-18, and 3/8"-16. Pick the diameter and length that matches your deck and steel, then buy by the contractor pack or the bulk box.
Pre-drill through the deck and the steel before you drive. An undersized hole can snap a hardened screw. Spec sheets are available on request.
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SteelBlack Phosphate3156FTFB-3005/16"-18 x 3 1/2" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$106.76 – $254.19Bulk Box (300 pcs) $254.19
SteelBlack Phosphate3196FTFB-2005/16"-18 x 6" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$107.20 – $418.73Bulk Box (200 pcs) $418.73
SteelBlack Phosphate1020FTFB-2000#10-24 x 1 1/4" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$102.35 – $266.54Bulk Box (2,000 pcs) $266.54
SteelBlack Phosphate1472FTFB-3001/4"-20 x 4 1/2" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$121.40 – $316.14Bulk Box (300 pcs) $316.14
SteelBlack Phosphate3716FTFB-10003/8"-16 x 1" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$211.59 – $551.02Bulk Box (1,000 pcs) $551.02
SteelBlack Phosphate3124FTFB-12505/16"-18 x 1 1/2" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$138.91 – $361.74Bulk Box (1,250 pcs) $361.74
SteelBlack Phosphate1024FTFB-4000#10-24 x 1 1/2" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$95.71 – $249.24Bulk Box (4,000 pcs) $249.24
SteelBlack Phosphate1408FTFB-50001/4"-20 x 1/2" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$391.83 – $938.75Bulk Box (5,000 pcs) $938.75
SteelBlack Phosphate1412FTFB-30001/4"-20 x 3/4" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$146.02 – $380.25Bulk Box (3,000 pcs) $380.25
SteelBlack Phosphate3112FTFB-20005/16"-18 x 3/4" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$190.55 – $496.22Bulk Box (2,000 pcs) $496.22
SteelBlack Phosphate3116FTFB-15005/16"-18 x 1" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$195.56 – $509.28Bulk Box (1,500 pcs) $509.28
SteelBlack Phosphate3172FTFB-3005/16"-18 x 4 1/2" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$311.85 – $1,218.18Bulk Box (300 pcs) $1,218.18
SteelBlack Phosphate3720FTFB-10003/8"-16 x 1 1/4" Type F / Floorboard Thread Cutting Screws / 6-Lobe / Flat Head / Steel / Black Phos
$192.21 – $500.55Bulk Box (1,000 pcs) $500.55
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