SCREW
P/N C7985-3-13
P/N AIC985-3-13
P/N PBF1166-3-13
P/N SF-117-3-13
P/N 121558-3-A13P
NSN 5305 01 054 6259
MFG LOCKHEED MARTIN
 
NEW GOV SURPLUS
SUPPLIER CAGE CODE 03EF7
 
ITEM NAME   SCREW,CLOSE TOLERAN
DEFINITION  A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion
             is of specified grip length, plated or unplated, and is machined to a
             tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a
             specific diameter for items (1.000 IN.) (25 mm) or less in diameter.
             Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of
             fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal
             major diameter of the threads shall be at least one thousandth (0.001
             IN.) (0.025 mm) below the minimum shank diameter, but not below the
             minimum major diameter for applicable class of fit, as shown in the
             Screw Thread Standards, FED STD H28 and/or other nationally recognized
             standards. The head is designed to be held or driven with an inserted
             driver. It is not designed for rotation by the thumb and fingers. A
             locking feature may be incorporated in the design of the head or
             threads.
            
 
CHARACTERISTIC                          VALUE
THREAD CLASS                            3A                                               
THREAD DIRECTION                        RIGHT-HAND                                       
THREAD LENGTH                           0.338 INCHES MINIMUM AND 0.388 INCHES MAXIMUM    
FASTENER LENGTH                         1.160 INCHES MINIMUM AND 1.190 INCHES MAXIMUM    
HEAD STYLE                              FLAT COUNTERSUNK                                  
HEAD DIAMETER                           0.258 INCHES MINIMUM AND 0.305 INCHES MAXIMUM    
GRIP DIAMETER                           0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM  
INTERNAL DRIVE STYLE                    OFFSET CRUCIFORM (TORQUE SET)                    
NOMINAL THREAD DIAMETER                 0.190 INCHES                                     
GRIP LENGTH                             0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM    
THREAD QUANTITY PER INCH                32                                                
MINIMUM TENSILE STRENGTH                220000 POUNDS PER SQUARE INCH                    
HARDNESS RATING                         46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C      
                                        MAXIMUM OVERALL                                  
COUNTERSINK ANGLE                       99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM   
MATERIAL                                STEEL COMP H11 OVERALL                           
MATERIAL DOCUMENT AND                   AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CLASSIFICATION                                                                           
SURFACE TREATMENT                       CADMIUM OVERALL                                   
SURFACE TREATMENT DOCUMENT              NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
AND CLASSIFICATION                                                                       
THREAD SERIES DESIGNATOR                UNJF