SCREW CAP
P/N MS16997-95
PN NAS1352-5-8P
NSN 5305-00-978-9390
MFG MILITARY STANDARDS
 
NEW GOV SURPLUS
SUPPLIER CAGE CODE 03EF7
 
ITEM NAME:   SCREW,CAP,SOCKET HE
DEFINITION:  An externally threaded fastener whose threaded portion is of one
             nominal diameter. The head has an internal socket or multiple spline
             for use with an inserted driver. A locking feature may be incorporated
             in the design of the head or threads. Excludes items with bevel
             (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW,
             SHOULDER; and SCREW, MACHINE.
            
 
CHARACTERISTIC                          VALUE
THREAD CLASS                            3A                                               
THREAD DIRECTION                        RIGHT-HAND                                       
THREAD LENGTH                           0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM    
FASTENER LENGTH                         0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM    
HEAD STYLE                              FLAT CHAMFER                                     
HEAD DIAMETER                           0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM    
HEAD HEIGHT                             0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM    
INTERNAL DRIVE STYLE                    HEXAGON                                          
NOMINAL THREAD DIAMETER                 0.375 INCHES                                     
WIDTH ACROSS FLATS                      0.312 INCHES MINIMUM AND 0.316 INCHES MAXIMUM    
THREAD QUANTITY PER INCH                16                                               
MINIMUM TENSILE STRENGTH                160000 POUNDS PER SQUARE INCH                    
HARDNESS RATING                         36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C      
                                        MAXIMUM OVERALL                                   
MINIMUM YIELD STRENGTH                  130000 POUNDS PER SQUARE INCH                    
MATERIAL                                STEEL OVERALL                                    
SURFACE TREATMENT                       CADMIUM AND CHROMATE OVERALL                     
SURFACE TREATMENT DOCUMENT              QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT        
AND CLASSIFICATION                      RESPONSES OVERALL                                
THREAD SERIES DESIGNATOR                UNC