Normalized tube record

3/8 in tube class

A 3/8-inch nominal tube class used by many larger single-barrel projects. Confirm whether a seller is describing the tube OD or the drill size before substituting stock.

3/8 in3/8 inch0.375 in

Observed outside diametersNot measured

Known kit lengths0

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

.50 Cal RiflemenXiamen Rizheng Industry Co. Ltd · 12915Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →30 Caliber Bolt Action Bullet Cartridge Pen familyPenn State Industries (sold by PSI and Rockler) · PKCP80(XX); PKCP8000/8010/8020/8030/8040/8050/8060Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →American Beauty Twist Pen familyPenn State Industries (sold by PSI and Rockler) · PKAB(XX); examples PKABCH, PKABGM, PKABSGMKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →American Patriotic Twist Pen KitPsi Woodworking · 8592Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Art Deco Pen Kit – Ball PointPsi Woodworking · 5810Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →BattalionLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Bolt Actions – Mini (2 Colors Available )Psi Woodworking · 6419Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Bolt Actions ( 3 Colors Available )Psi Woodworking · 6868Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Bottle Stopper Turning Mandrel, 3/8-16Rockler · Compatible Rockler bottle stoppers with 3/8-16 thread and 3/4 in ODKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Broadwell Nouveau Sceptre Twist PenPsi Woodworking · 6969Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →BuccaneerLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Bullet Key ChainLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Corinthians ( 3 Colors Available )Xiamen Rizheng Industry Co. Ltd · 12907Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Da VinciLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Designer Pen / PencilWoodTurningz · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Executive Twist Pen, Gun MetalPenn State Industries (sold by PSI and Rockler) · PKEXECPENGKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Fly Fishing Twist Pen KitsPsi Woodworking · 10006Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Gear ClickLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Hexagonal Click Pen / PencilLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Knights Armor Twist PenBerea Hardwoods · 7917Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Komodo Dragon Pen KitXiamen Rizheng Industry Co. Ltd · 8906Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Polaris TwistLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Steampunk Bolt Action PensPsi Woodworking · 8643Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Stick ShiftLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →UM-2MT Mandrel for Bottle Stoppers and Honey DipperStainless Bottle Stoppers (sold by Rockler) · Rockler item 62683; MPN UM-2MTKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →