TATurner's AtlasPen tube size library

Tube guide/8 mm / Letter O tube class

Normalized tube record

8 mm / Letter O tube class

A nominal 8 mm or Letter O drilling class. Cataloged tubes in this group include 0.311-inch outside diameters; the exact OD, wall thickness, and cut length still belong to the individual kit record.

8 mm8mmLetter OO-size0.311 in OD
Observed outside diameters0.311" (7.9 mm)
Known kit lengths11
Linked kits / projects25
Replacement listings3
Before substituting

Match OD, wall thickness, and length.

The class name helps discovery; it does not override the kit maker's current tube specification. A close drill size does not prove that two brass tubes are interchangeable.

Kit cross-reference

Known barrel lengths

Artisan Americana Pen KitCraft Supplies USA · 050-0214Upper / capbarrel position0.311" (7.9 mm)tube OD2.050" (52.1 mm)tube length2.300" (58.4 mm)minimum blank cutOpen kit →Artisan Americana Pen KitCraft Supplies USA · 050-0214Lower / bodybarrel position0.311" (7.9 mm)tube OD2.050" (52.1 mm)tube length2.300" (58.4 mm)minimum blank cutOpen kit →Bullet ClickLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Classic Twist PenLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Cushion Grip Click BPBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD1.980" (50.3 mm)tube lengthNot recordedminimum blank cutOpen kit →Elegant AmericanLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Elegant American BPBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD2.000" (50.8 mm)tube lengthNot recordedminimum blank cutOpen kit →Elegant American BPBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.150" (54.6 mm)tube lengthNot recordedminimum blank cutOpen kit →Faith Hope & LovePsi Woodworking · 8616Kit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Flat Top American Double Twist BPBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Flat Top American Double Twist BPBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Flat Top American Double Twist Hybrid BPBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Flat Top American Double Twist Hybrid BPBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Flat Top American PencilBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Flat Top American PencilBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Inspirational TwistLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Jam SessionLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Magnifing GlassBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.362" (60.0 mm)tube lengthNot recordedminimum blank cutOpen kit →Mistral Ballpoint / PencilBeaufort Ink · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.075" (52.7 mm)tube lengthNot recordedminimum blank cutOpen kit →NevusBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD1.181" (30.0 mm)tube lengthNot recordedminimum blank cutOpen kit →New Series BPBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →New Series BPBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.360" (59.9 mm)tube lengthNot recordedminimum blank cutOpen kit →Perfect Fit Convertable BP and PencilBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.360" (59.9 mm)tube lengthNot recordedminimum blank cutOpen kit →PowerLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Razor shaving brush kitsXiamen Rizheng · RZ-PK94Lower / bodybarrel positionNot recordedtube OD0.311" (7.9 mm)tube lengthNot recordedminimum blank cutOpen kit →Round Top 8mm European BPBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Round Top 8mm European BPBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.370" (60.2 mm)tube lengthNot recordedminimum blank cutOpen kit →Round Top 8mm European PencilBerea Hardwoods · No SKU recordedUpper / capbarrel position0.311" (7.9 mm)tube OD2.010" (51.1 mm)tube lengthNot recordedminimum blank cutOpen kit →Round Top 8mm European PencilBerea Hardwoods · No SKU recordedLower / bodybarrel position0.311" (7.9 mm)tube OD2.370" (60.2 mm)tube lengthNot recordedminimum blank cutOpen kit →Slimline Pro Pen / PencilLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Slimline Pro Pen & PencilsPsi Woodworking · 2074Kit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Whimsy Rollerball Pen KitWoodcraft / WoodRiver · 197262Kit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →WordsmithLegacy Woodturning · No SKU recordedKit recordbarrel position0.311" (7.9 mm)tube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →