Imperial Scale Model Steel 3 - UNC Nuts
3-48 UNC Threaded Steel Bar Turned Nut
Across Flats = 5/32" \ 0.158 \ 4.00mm
Height =  0.87" \ 2.21mm
( Threaded 48 TPI ) 
Steel Hex Bar Turned - Just been UK Manufactured.
Other Sizes Will Follow Soon
Free Of Charge Delivery First Class Post Included
ROW - Airmail Delivery £4.00