SCREW
P/N HT6A18
NSN 5305 00 058 8822
MFG ALCOA GLOBAL FASTENERS 
 
NEW GOV SURPLUS
SUPPLIER CAGE CODE 03EF7
 
ITEM NAME:   SCREW,MACHINE
DEFINITION:  An externally threaded fastener whose threaded portion is of one
             nominal diameter, No 0 (0.060 in./1.5 mm) or larger, designed to be
             held or driven with either a wrench or an inserted driver or both
             (excluding internal socket or internal multiple spline types), in
             sizes below No. 10 (0.190 in./5 mm). No. 10 and larger sizes must have
             a head designed for any type inserted driver (excluding internal
             socket or internal multiple spline types), but may also be designed
             for external wrenching. A locking feature may be incorporated in the
             design of the head or threads. Excludes BOLT, CLEVIS; BOLT, EXTERNALLY
             RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; and SCREW, ASSEMBLED
             WASHER. See also, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL
             WRENCHING; and SCREW, CAP SOCKET HEAD.
            
 
CHARACTERISTIC                          VALUE
THREAD CLASS                            3A                                               
THREAD DIRECTION                        RIGHT-HAND                                       
THREAD LENGTH                           0.641 INCHES MINIMUM                             
FASTENER LENGTH                         1.766 INCHES NOMINAL                             
HEAD STYLE                              FLAT COUNTERSUNK                                 
HEAD DIAMETER                           0.735 INCHES MINIMUM AND 0.760 INCHES MAXIMUM    
INTERNAL DRIVE STYLE                    HIGH-TORQUE                                       
NOMINAL THREAD DIAMETER                 0.375 INCHES                                     
THREAD QUANTITY PER INCH                24                                               
MINIMUM TENSILE STRENGTH                90000 POUNDS PER SQUARE INCH                     
COUNTERSINK ANGLE                       100.0 DEGREES NOMINAL                            
SCREW MATERIAL                          STEEL COMP 431                                   
SCREW MATERIAL DOCUMENT AND             QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE       
CLASSIFICATION                                                                           
SCREW SURFACE TREATMENT                 PASSIVATE                                        
DESIGN CONTROL REFERENCE                HT6A18                                           
THE MANUFACTURERS DATA                  73197                                            
MANUFACTURERS CODE                                                                       
THREAD SERIES DESIGNATOR                UNF