BOLT
PN NAS1104-63
NSN 5306 00 720 8034
MFG NATIONAL AEROSPACE STANDARDS
NEW GOV SURPLUS
SUPPLIER CGE CODE 03EF7
ITEM NAME:   BOLT,SHEAR
DEFINITION:  A high strength, 160,000 pounds per square inch (1100 megapascals)

             minimum tensile strength externally threaded fastener designed for use

             in applications involving great shear stress. The head is designed to

             accommodate an external wrench or driver. The head is not designed to

             be held or driven with an inserted driver, nor is it designed for

             rotation by the thumb and fingers. The unthreaded portion is of

             specific grip length, plated or unplated, and is machined to a

             tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a

             specific diameter for items one inch (25 mm) or less in diameter.

             Items over one inch (25 mm) in diameter shall have a tolerance of

             fifteen ten thousandths (0.0015) of an inch (0.038 mm) or less. The

             nominal major diameter of the threads shall be at least one thousandth

             (0.001) of an inch (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. A locking feature may be incorporated

             in the design of the head or threads. See BOLT, MACHINE and BOLT,

             CLEVIS.
THREAD CLASS                            3A                                               
THREAD DIRECTION                        RIGHT-HAND                                       
THREAD LENGTH                           0.316 INCHES MINIMUM                             
FASTENER LENGTH                         4.253 INCHES NOMINAL                             
HEAD STYLE                              DISHED HEXAGON                                   
HEAD HEIGHT                             0.125 INCHES NOMINAL                             
WIDTH BETWEEN FLATS                     0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM     
GRIP DIAMETER                           0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM  
NOMINAL THREAD DIAMETER                 0.250 INCHES                                     
GRIP LENGTH                             3.937 INCHES NOMINAL                              
THREAD QUANTITY PER INCH                28                                               
MINIMUM TENSILE STRENGTH                160000 POUNDS PER SQUARE INCH                    
HARDNESS RATING                         36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C      

                                        MAXIMUM OVERALL                                  
MATERIAL                                STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP

                                        6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OR    

                                        STEEL COMP 4037 OVERALL                          
MATERIAL DOCUMENT AND                   MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR     
CLASSIFICATION                          MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR     

                                        MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR     

                                        MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR     

                                        MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OR     

                                        MIL-S-8695 MIL SPEC 6TH MATERIAL RESPONSE OVERALL
SURFACE TREATMENT                       CADMIUM AND CHROMATE OVERALL                     
SURFACE TREATMENT DOCUMENT              QQ-P-416,TY 2 CL 3 FED SPEC SINGLE TREATMENT     
AND CLASSIFICATION                      RESPONSE OVERALL                                 
THREAD SERIES DESIGNATOR                UNF