Answer
Dec 20, 2023 - 12:54 PM
Hi there, the standard wall 90408 and thin wall 90373 is 5/16" that is 0.3125 inch and 7.9375 mm.
For standard wall 5/16" – 18 (90408) Pitch size - 1.25 mm; Drill bit size - 7/16”; Hole Depth - 0.551 – 9/16”.
For thin wall 5/16" - 18 (90737) Pitch size- 0.366 mm; Hole Depth – 43/64”.
For standard wall 5/16" – 18 (90408) Pitch size - 1.25 mm; Drill bit size - 7/16”; Hole Depth - 0.551 – 9/16”.
For thin wall 5/16" - 18 (90737) Pitch size- 0.366 mm; Hole Depth – 43/64”.
![What are the precise diameters [e.g. to 1/1000th of an inch] of 90408 [std wall] and 90373 [thin wall]?](https://canadaweldingsupply.ca/a/answers/product/6571342/images/What-are-the-precise-diameters-e-g-to-1-1000th-of-an-inch-of-90408-std-wall-and-90373-thin-wall.webp)
