Check the listing for details. 1/2-20 12 Point Jet Nuts Self Locking Extended Washer Flange Locknut 10 pcs.. Condition: New. Listed at 18.95 USD. Ten each (10) new surplus 1/2" - 20, 12 point double hex extended washer self locking aircraft jet nuts. (5/8 wrench size) , SPS Technologies p/n 69678 820. 5310-00-181-6032 Fedlog specs - PLEASE NOTE - Items in red are actual measurements. Characteristics Data Response for NSN 5310-00-181-6032 Item Name: NUT,SELF-LOCKING,EXTENDED WASHER MRC Requirement Statement Clear Text Reply NAME ITEM NAME NUT,SELF-LOCKING,EXTENDED WASHER AAJD THREAD CLASS 3B AAJF THREAD DIRECTION RIGHT-HAND AAUM LOCKING FEATURE PREVAILING TORQUE ALL METAL DESIGN AAVX WASHER OUTSIDE DIAMETER 0.950 INCHES MAXIMUM (meas. .825) ABAJ LUBRICATION SOLUBLE LUBRICANT ABKW OVERALL HEIGHT 0.675 INCHES MAXIMUM (meas. 590) ACTA NUT STYLE A293 DOUBLE HEXAGO ADEM WASHER THICKNESS 0.040 INCHES MINIMUM ASDB WIDTH ACROSS FLATS 0.616 INCHES MINIMUM AND 0.627 INCHES MAXIMUM AZKQ TEMP RATING -65.0 DEG FAHRENHEIT MINIMUM AND 450.0 DEG FAHRENHEIT MAXIMUM BZRR THREAD SERIES UNJF CMLP THREAD QUANTITY PER INCH 20 CQFM HARDNESS RATING 45.0 ROCKWELL C NOMINAL CQJX NOMINAL THREAD SIZE 0.500 INCHES CRSQ COUNTERSINK ANGLE ANY ACCEPTABLE NUT MATT MATERIAL STEEL COMP 8740 OVERALL OR STEEL COMP H11 MDCL MATERIAL DOCUMENT AND MATERIAL CLASSIFICATION AMS 6322 ASSN STD 1ST RESPONSE OVERALL OR AM 6485 ASSN STD 2ND MATERIAL RESPONSE OR AMS 6487 ASSN STD 2ND MATERIAL RESPONSE SFTT SURFACE TREATMENT CADMIUM OVERALL STDC SURFACE TREATMENT DOCUMENT QQ-P-416,TY 2,CL 2 FED SPEC AND CLASSIFICATION SINGLE TREATMENT RESPONSE OVERALL