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SP G250 jam nut

Discussion in 'Do It Yourself - DIY' started by couv, Apr 4, 2018.

  1. Geo7

    Geo7 Contributor

    # of Dives: 2,500 - 4,999
    Location: Los Angeles
    199
    114
    Hi all, one more bit of information: The jam nut for the Halcyon Aura (equivalent to Scubapro R380) seems to have the same height as the jam nut for the G500 (see attached photo), which I think means it is the same as the original G250 (someone will have to confirm this though).

    It seems to work great on the G500, even though it is a bit narrow and does not cover as much surface area. That's because it is designed to work with a washer on the R380/Aura. But it seems the original G regs were like that. It also provides space for an oring at the narrow end, and the original G500 spec has that o-ring on the housing side (no groove on the barrel as on the G250V and later regs).

    Hope that helps...

    IMG_E3731.JPG
     
  2. Manatee Diver

    Manatee Diver Stop throwing lettuce at me! ScubaBoard Supporter

    # of Dives: None - Not Certified
    Location: Tampa Bay, FL
    2,065
    1,979
    Well I managed to get my hands on a Halcyon Halo jam nut, and it doesn't work with the S560. Looks like the 560 uses a washer and then a nut that fits over it.
     
    couv likes this.
  3. tridacna

    tridacna ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: New Jersey
    7,327
    4,638
    No matter what you say, I’m still seeing Red Green and his nephew.
     
  4. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower
    5,887
    3,681
    Sergeant Preston of the Yukon! "Mush you huskies!"
     
  5. tridacna

    tridacna ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 2,500 - 4,999
    Location: New Jersey
    7,327
    4,638
    “If your wife doesn’t find you handsome, at least she’ll find you handy”.
     
    rhwestfall, Modi and couv like this.
  6. Open Ocean Diver

    Open Ocean Diver ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 50 - 99
    Location: Toronto, Lauderdale-by-the-Sea
    1,052
    693
    Sample jam nuts should be here in a couple days, then off to be machined. Shouldn’t take to long now.
     
    buddhasummer, Fishyhead, couv and 2 others like this.
  7. 1967Goat

    1967Goat Contributor

    # of Dives: 50 - 99
    Location: Conifer, CO
    121
    162
    I worked in a small (15 man) machine shop my senior year in high school, then 2 years after that. :( I miss having access to a lathe and a Bridgeport. I still have a lot of my tools I bought.
     
  8. buddhasummer

    buddhasummer Bat sh.t crazy ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Nanny State
    11,682
    4,407
    Be nice to know if that Aura nut fits a standard G250, can anyone confirm this?

    Also does anyone have, local to @Open Ocean Diver, a G260 jam nut they could lend to him to see if he can machine something so we can kill off the G260 jam nut too.

    Thank you.
     
    Geo7 likes this.
  9. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower
    5,887
    3,681
    Guys, guys, guys.

    This thread is almost 3 years old and not one significant bit of progress has been made. Why? Because we are trying to make a "one size fits all" piece of hardware. Despite the efforts of @Bryan@Vintage Double Hose and @rsingler (please go back and review their input) we still do not have an aftermarket nut for a standard G250 much less the entire line of SP second stages.

    How about we take a step back and focus on the most popular second stage (G250) that will benefit from this hardware and worry about the other models later?

    Cheers,

    Couv
     
  10. buddhasummer

    buddhasummer Bat sh.t crazy ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: Nanny State
    11,682
    4,407
    No no no....

    March full steam ahead, different players are involved now and I know at least one member @Modi is making very positive headway into killing off the G250 spline nut. @Open Ocean Diver also in action phase.

    No buckets of cold water please.
     

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