TATurner's AtlasPen tube size library

Tube guide/7 mm tube class

Normalized tube record

7 mm tube class

The common small brass-tube class used by many slimline and single-barrel projects. The 7 mm name usually follows the required drill size, not a guarantee of the tube's measured outside diameter.

7 mm7mmstandard 7 mm tube
Observed outside diameters0.382" (9.7 mm)
Known kit lengths1
Linked kits / projects38
Replacement listings9
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

2-in-1 Bottle Opener and Wine CorkscrewPenn State Industries · BS25XKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Bottle Opener Keychain familyPenn State Industries · PKBPNKC(XX); examples PKBPNKCCH, PKBPNKCGM, PKBPNKCBRKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Classic OrnamentLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Comfort / DuchessWoodWorld of Texas · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Comfort Grip Pen Kits ( 6 Color of Finishes)Xiamen Rizheng Industry Co. Ltd · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Comfort Grip Pencil KitsXiamen Rizheng Industry Co. Ltd · 4482Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Comfort Pen / PencilLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Decorative OrnamentLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Detachable Bolt Action Style KeychainPenn State Industries · PKDET224; family PKDET2(XX)Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Detachable Key ChainLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Euro Pen / PencilLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →European FiligreeLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Funline Comfort Twist Pen familyPenn State Industries · PKCFFUN(XX); example PKCFFUNSGKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Funline Slimline Twist Pen familyPenn State Industries · PKSLFUN(XX); example PKSLFUNCHKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Gear Shift Bottle StopperPenn State Industries · BS11GSKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Key ChainLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Letter OpenerLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Leveche Fountain / RollerballBeaufort Ink · No SKU recordedLower / bodybarrel position0.382" (9.7 mm)tube OD2.559" (65.0 mm)tube lengthNot recordedminimum blank cutOpen kit →Light Pull KitPenn State Industries · PK-LTPULL / PK-LTPULLC; family PK-LTPULL(XX)Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Mach3 RazorLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →MagneticLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →MagnifierLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Measuring Cup Kits, set of fourPenn State Industries · PKMSCUPKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Measuring Spoon Kits, set of fourPenn State Industries · PKMSPNKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Mini Bolt Action Keychain PenPenn State Industries · PKCPMINCH / PKCPMINGM; family PKCPMIN(XX)Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Mistral Fountain / RollerballBeaufort Ink · No SKU recordedLower / bodybarrel position0.382" (9.7 mm)tube OD2.559" (65.0 mm)tube lengthNot recordedminimum blank cutOpen kit →Portable Key Chain PenLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Slimline / Fancy Pen / PencilLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Slimline Pen and Pencil familyRockler · Multiple Rockler Slimline kitsKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Soft Touch StylusLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Standard Keychain KitPenn State Industries · PKKEYC / PKKEYS; family PKKEY(XX)Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Standard Mach3 Razor Handle, Gun MetalPenn State Industries · PKRAHANBTKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Star OrnamentLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Streamline / Highline / American Flag / Largemouth Bass familyLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →T-Handle Corkscrew, with or without stopperPenn State Industries · BS6 / BS7Kit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →TeacherLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →Traditional OrnamentLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →VictoriaLegacy Woodturning · No SKU recordedKit recordbarrel positionNot recordedtube ODNot recordedtube lengthNot recordedminimum blank cutOpen kit →