SCREW
P/N NAS586-25
NSN 5305-01-256-6888
MFG NATIONAL AEROSPACE STANDARDS

 

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                           0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM    

FASTENER LENGTH                         2.188 INCHES MINIMUM AND 2.218 INCHES MAXIMUM    

HEAD STYLE                              FLAT COUNTERSUNK                                 

HEAD DIAMETER                           0.717 INCHES MINIMUM AND 0.760 INCHES MAXIMUM    

GRIP DIAMETER                           0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM   

INTERNAL DRIVE STYLE                    HIGH-TORQUE                                      

NOMINAL THREAD DIAMETER                 0.375 INCHES                                     

GRIP LENGTH                             1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM    

THREAD QUANTITY PER INCH                24                                               

MINIMUM TENSILE STRENGTH                160000 POUNDS PER SQUARE INCH                    

HARDNESS RATING                         36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C      

                                        MAXIMUM OVERALL                                  

COUNTERSINK ANGLE                       99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM   

SURFACE FINISH                          32.0 MICROINCHES GRIP 32.0 MICROINCHES THREADS   

MATERIAL                                STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP

                                        4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR    

                                        STEEL COMP 6150 OR STEEL COMP 4130 OVERALL       

SURFACE TREATMENT                       CADMIUM AND CHROMATE OVERALL                     

SURFACE TREATMENT DOCUMENT              QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT

AND CLASSIFICATION                      RESPONSE OVERALL                                 

THREAD SERIES DESIGNATOR                UNJF                                             

SPECIFICATION/STANDARD DATA             80205-NAS586 PROFESSIONAL/INDUSTRIAL ASSOCIATION 

                                        STANDARD