Used on submarine engineering and diesel systems; los angeles class ssn (688); ship, ohio class ssn (trident). 2a thread class right-hand 2.031" overall length 20 thread quantity per inch in order to complete the connector assembly, the user must obtain/provide the backshell. standard versions may be ordered as nsn 5935-01-163-3224, p/n M85049/52-1-14w for the straight style, or nsn 5935-01-186-5612, p/n M85049/51-1-14w for the right angle style; 16-22 wire size socket contacts in lieu of 16-16; weapon system essential unef thread series