[ARC5] Military bolts

[WA5CAB--- via ARC5]

A few BW or BSF sizes have the same thread pitch for the diameter as UNC or 
UNF but many do not.

In a message dated 11/19/2014 11:15:12 AM Central Standard Time, 
midnitetoaker58 at gmail.com writes: 
> Floyd, just FYI,...british bolts, altho they used same thread pitch as 
> us,
> use 55 degree angle on threads, we use 60 degree angle,..I learned this
> with my British Triumph Motorcycle long ago,. bolts wud shake loose on me
> often,..this turned out to be a problem I wasnt aware of, when I worked 
> for
> International Harvester,.. old timer told me many contracted parts for  
> war
> effort British equipment had BIG problems with this, and were shipped 
> befor
> any one knew,..I saw one of those mini tanks in the hanger long time ago
> befor I was grounded for blood pressure,..another story,..see ya,
> Robert/Chicago..

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480