FLAT WASHER P/N 12592060 
NSN 5310-01-341-4739

ITEM NAME:   WASHER,FLAT
DEFINITION:  A washer having a centrally located hole with a solid or laminated
             cross-section and two flat parallel bearing surfaces. The hole must be
             75 percent or less than the largest dimension and the bearing surface
             finish is greater than 32 microinch (0.8 micrometer). The thickness
             cannot exceed 25 percent of the largest outside dimension. When the
             largest outside dimension is less than 1/4 inch or 6mm, the thickness
             must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm)
             or larger, the thickness must be 0.016 inches (0.4mm) or greater. The
             maximum tolerance is applied to dimensions and used as a determining
             factor. Items with separable lamination use SHIM. For items fabricated
             from ceramic or electrically rated materials by specification or
             industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE,
             graphite impregnated and lubricated items.
             

CHARACTERISTIC                          VALUE
CROSS-SECTIONAL SHAPE STYLE             RECTANGULAR                                       
HOLE DIAMETER                           4.270 INCHES NOMINAL                              
PERIPHERAL SHAPE STYLE                  ROUND                                             
CENTER HOLE SHAPE STYLE                 ROUND                                             
THICKNESS                               0.0410 INCHES NOMINAL                             
OVERALL DIAMETER                        5.610 INCHES NOMINAL                              
III END ITEM IDENTIFICATION             USED ON ABF334 AR5                                
SPECIAL FEATURES                        12 SLOTS:10 DEGREES BETWEEN EACH ONE;6 ON TOP AND 
                                        6 ON BOTTOM;2 MOUNTING HOLES:0.208 DIAMETER;EACH  
                                        SLOT 0.032 WIDE;EACH SLOT 0.250 LONG              
MATERIAL                                STEEL OVERALL                                     
MATERIAL DOCUMENT AND                   ASTM A570,GR 36 OR 40 ASSN STD 1ST MATERIAL       
CLASSIFICATION                          RESPONSE OR ASTM A109 ASSN STD 2ND MATERIAL       
                                        RESPONSE OVERALL                                  
SURFACE TREATMENT                       CHROMATE OVERALL                                  
DESIGN CONTROL REFERENCE                12592060                                          
THE MANUFACTURERS DATA                  19200                                             
MANUFACTURERS CODE                                                                        
SURFACE TREATMENT DOCUMENT              QQ-P-416,TYPE 2,CL 1 FED SPEC SINGLE TREATMENT    
AND CLASSIFICATION                      RESPONSE OVERALL  

MFG US ARMY ARDEC RDECOM   
NEW GOV SURPLUS 
SUPPLIER CAGE CODE 03EF7