Aerotech thread

Can anyone tell me what the thread in the end of the 75mm DR rocket/areotech forward closure is - its about 3/8 or 10mm, UNF?
metric?
Steve
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.