SCREW
P/N MS16997-68
PN 4HB852
PN 138207
NSN 5305 00 978 9387
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                           0.960 INCHES MINIMUM AND 1.000 INCHES MAXIMUM    
FASTENER LENGTH                         2.460 INCHES MINIMUM AND 2.500 INCHES MAXIMUM    
HEAD STYLE                              FLAT CHAMFER                                     
HEAD DIAMETER                           0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM    
HEAD HEIGHT                             0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM    
INTERNAL DRIVE STYLE                    HEXAGON                                          
NOMINAL THREAD DIAMETER                 0.250 INCHES                                     
WIDTH ACROSS FLATS                      0.187 INCHES MINIMUM AND 0.190 INCHES MAXIMUM    
THREAD QUANTITY PER INCH                20                                               
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                     
DEFINITIVE GOVERNMENT                   MS16997-68                                       
SPEC/STD REFERENCE                                                                        
SPEC/STD CONTROLLING DATA               96906                                            
MANUFACTURERS CODE                                                                       
SURFACE TREATMENT DOCUMENT              QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT        
AND CLASSIFICATION                      RESPONSES OVERALL                                
THREAD SERIES DESIGNATOR                UNC