NUT
P/N C25-20B271SS
P/N RNSS420-271B
P/N SS25B271
NSN 5310 01 100 5210
MFG BF GOODRICH
 
NEW GOV SURPLUS
SUPPLIER CAGE CODE 03EF7
 
ITEM NAME   NUT,SELF-LOCKING,BL
DEFINITION  A metallic headed fastener having internal threads for a portion of
             the full length. It may have a smooth, hexagon or splined shank with
            an open or closed end. It is designed to be expanded tightly against
             the material it is being installed in by means of a special tool. The
             item must have a specified grip range. The grip range is the thickness
             of the material the item is being installed in. An integral feature is
             incorporated for locking on the threads of a mating member.
            
 
CHARACTERISTIC                          VALUE
THREAD CLASS                            3B                                                
THREAD DIRECTION                        RIGHT-HAND                                       
HEAD STYLE                              FLAT COUNTERSUNK                                 
HEAD DIAMETER                           0.529 INCHES NOMINAL                             
LOCKING FEATURE                         PREVAILING TORQUE ALL METAL DESIGN               
NUT STYLE                               BLIND RIVET W/SMOOTH ROUND SHANK                 
NUT DIAMETER                            0.328 INCHES MINIMUM AND 0.332 INCHES MAXIMUM    
NUT LENGTH                              1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM    
NUT GRIP RANGE                          0.211 TO 0.271 INCHES                             
SHANK END TYPE                          CLOSED                                           
THREAD SERIES                           UNC                                              
THREAD QUANTITY PER INCH                20                                                
NOMINAL THREAD SIZE                     0.250 INCHES                                     
HEAD COUNTERSINK ANGLE                  99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM   
MATERIAL                                STEEL COMP 430 OVERALL                           
MATERIAL DOCUMENT AND                   QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CLASSIFICATION                                                                           
SURFACE TREATMENT                       PASSIVATE OVERALL                                
DESIGN CONTROL REFERENCE                RNSS420-271B                                     
THE MANUFACTURERS DATA                  84256                                            
MANUFACTURERS CODE                                                                       
SURFACE TREATMENT DOCUMENT              QQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE