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Lag Screws (truss)

Lag Screws, are sometimes incorrectly called Lag Bolts. They usually have a square or hexagonal head and a wood screw-style thread with a point. Because of their larger diameter, they usually require a pre-drilled hole. They are usually much larger diameter than wood screws, and are used to connect wood or like materials that need to bear a heavy load. In the U.K., Lag Screws are known as Coach Screws.

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Buy Lag Screws from one of our FCH Network Members
SupplierLocTypeMaterialFinishSizeDescriptionQty 
SWACOOHLag ScrewSteelBlack Oxidebolt lag truss .276x3-1/2 steel black oxide and wax500
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JET FITTINGCALag ScrewSteelBlack Oxidebolt lag truss .276x3-1/2 steel black oxide and wax BW0790UHD BO500
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JET FITTINGCALag ScrewSteelBlack Oxidebolt lag truss .276x3-1/2 steel black oxide and wax500
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SeattleNBWALag Screw316, 317, A4 StainlessPlain5/16 x 4flat socket lag 2/3 thread with protrusion height 7/32 hexagon socket size 316 ss q dephillips truss min 3.5 mm 316ss3090
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SeattleNBWALag Screw316, 317, A4 StainlessPlain3/8 x 4flat socket lag 2/3 thread with protrusion height 1/4 hexagon socket size 316 ss q dephillips truss min 4.0 mm 316ss3680
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SeattleNBWALag Screw316, 317, A4 StainlessPlain5/16 x 5flat socket lag 2/3 thread with protrusion height 7/32 hexagon socket size 316 ss q dephillips truss min 3.5 mm 316ss2560
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SeattleNBWALag Screw316, 317, A4 StainlessPlain5/16 x 6flat socket lag 2/3 thread with protrusion height 7/32 hexagon socket size 316 ss q dephillips truss min 3.5 mm 316ss5540
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SeattleNBWALag Screw316, 317, A4 StainlessPlain5/16 x 3flat socket lag 2/3 thread with protrusion height 7/32 hexagon socket size 316 ss q dephillips truss min 3.5 mm 316ss4330
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SeattleNBWALag Screw316, 317, A4 StainlessPlain3/8 x 6flat socket lag 2/3 thread with protrusion height 1/4 hexagon socket size 316 ss q dephillips truss min 4.0 mm 316ss4540
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SeattleNBWALag Screw316, 317, A4 StainlessPlain3/8 x 5flat socket lag 2/3 thread with protrusion height 1/4 hexagon socket size 316 ss q dephillips truss min 4.0 mm 316ss5160
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