Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Kollsman periscopic sextant mount
    From: David Pike
    Date: 2016 Nov 29, 15:16 -0800

    Actually, now I come to think about it, I don’t think I need to buy anything new after all.  I’ve got six 4BA machine screws with matching nuts.  If I pick six equi-spaced holes with plenty of space below them, I can use the 4BA screws and back up behind with 4BA nuts.  Then it doesn’t matter if they’re 38.48 TPI and a bit wobbly. The nuts will stop any chance of the mounting plus sextant coming tumbling down.  DaveP

    Probably 8-32. Nom dia is .164”, and most screws are sized slightly smaller than that.  Paul Dolkas

     

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site