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Thread: Bottle Cap Threads

  1. #1
    Boolit Master


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    Bottle Cap Threads

    I have a Harrel’s Precision benchrest powder measure that uses a plastic bottle for a reservoir.
    I would like to thread a piece of plastic tubing to use instead of a bottle.
    The major diameter is 2.045” and the threads are very coarse.
    Is anyone familiar with bottle cap threads?

  2. #2
    Boolit Grand Master

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    I think you can find them in Machinery's Handbook under rolled threads

  3. #3
    Boolit Master


    GregLaROCHE's Avatar
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    Some bottles and caps have a double thread so they can close faster.

  4. #4
    Boolit Buddy

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    I bought an adapter from Sinclair International that mounted on my RCBS Uniflow measure. Liked this because I never had to remove the powder from the original container preventing mix-ups. I check Sinclair to see if they could help but the no longer handle this item, They offered different adapters and different bottles I thought might have helped GW

  5. #5
    Boolit Buddy alfadan's Avatar
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    They are a butress thread I think.

  6. #6
    Boolit Master
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    Quote Originally Posted by deltaenterprizes View Post
    I have a Harrel’s Precision benchrest powder measure that uses a plastic bottle for a reservoir.
    I would like to thread a piece of plastic tubing to use instead of a bottle.
    The major diameter is 2.045” and the threads are very coarse.
    Is anyone familiar with bottle cap threads?
    The folks at Harrell's are a phone call away. Lynwood has been real easy to talk to....if he's still around. 504-380-2683.

  7. #7
    Boolit Master


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    jsizemore you had a bit of dislexia!
    The area code should be 540!
    You had me thinking that they are located in New Orleans!

  8. #8
    Boolit Master
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    one of the Youtube machinists I think Robrenz made a spray mister system that uses water bottles, he discussed the thread type in the video. IIRC he ground his threading bit for it.
    NRA High Master XTC
    DR# 2125

  9. #9
    Boolit Master

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    I have seen many types of threads on plastic bottles, very few alike.
    Spell check doesn't work in Chrome, so if something is spelled wrong, it's just a typo that I missed.

  10. #10
    Boolit Master Handloader109's Avatar
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    I would do as I do on my dillon. Take a plastic bottle cap that threads on the loader, drill a hole or melt a hole through it to fit the tubing. I use plastic tube, but if copper or aluminum, you can probably flare to hold inside the cap

    Sent from my SM-S908U using Tapatalk

  11. #11
    Boolit Buddy super6's Avatar
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    Quote Originally Posted by country gent View Post
    I think you can find them in Machinery's Handbook under rolled threads
    Yes on the machinery's handbook, You could make a space shuttle with all the information. LOL
    takeo Shimizu , The father of organic chemistry

  12. #12
    Boolit Buddy Sig's Avatar
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    If you know someone into 3d printing, they could print an adaptor that threads into the measure & allow the tube to slip into it.

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BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
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GC Gas Check