Product: 1/4-20 Threaded Insert for Wood Hex Drive Threaded Wood Inserts 1/4 Wood Nuts 40 Pieces
Brand: Sprite Science
1/4"-20 threaded insert wood insert furniture screw in nut connector screws 

 
Thread Type: 1/4"-20 
Total Length: 15mm 
Insert head diameter: 11.7mm 
 Insert Threads Diameter: 10.4mm 
Body Diameter: 0.315" / 8mm.
Material: carbon steel, zinc plated 

 
▲▲▲ -Suggested Drilling Hole for Soft Wood: 8.5mm, 9mm, 3/8". 
▲▲▲-Suggested Drilling Hole for Hard Wood: 3/8", 10mm. 
 
 
★★★NOTE: SIZE of drilling hole depends on the Hardness of the Material★★★ 
 
★★★Please drill a proper hole, test to check if inserts fit appropriately. 
 
★★★ ★ In Softer wood, the outside threads cut easily into the wood, simply drill a proper hole size (8.5mm, 9mm, 9.5mm, 3/8" drill bit) for the body of the insert, then screw insert into the place. 
 
★★★ ★ In very Harder wood such as white oak or maple, drill a hole size (3/8", 9.5mm, 10mm drill bit) that close to the outside threads diameter. 
If the drilled hole is too small for the threads, screwing it in MAY split the wood or insert. 
 
Package comes with 40pcs wood insert nut + 1pc 6mm allen wrench.
1/4-20 threaded insert x 15mm length, 6mm allen wrench included, best 1/4"-20 threaded insert wood insert furniture screw in nut connector screws.
Insert head ⌀: 0.461" / 11.7mm, body ⌀: 0.315" / 8mm, threads ⌀: 0.410" / 10.4mm.
Threaded inserts are easy to install, simply drill the right size hole and Install with hex key provided.
In Softer wood, the outside threads cut easily into the wood, simply drill a Appropriately Sized Hole (8.5mm, 9mm, 9.5mm, 3/8" drill bit) for the body of the insert, then screw insert into the place.
In very Harder wood such as white oak or maple, drill a hole size (3/8", 9.5mm, 10mm drill bit) that close to the outside threads diameter, then screw insert into the place. If the drilled hole is too small for the threads, screwing it in MAY split the wood or insert.

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