33/64 in Carbon Steel Self Locking Thread Insert with 3/8-16 Internal Thread Size, 10 PK/ THREAD DIRECTION: RIGHT-HAND LENGTH: 0.516 INCHES NOMINAL END ITEM IDENTIFICATION: TOOLS AND SHOP SETS PART NAME ASSIGNED BY CONTROLLING AGENCY: E-Z LOK THREAD INSERT SPECIAL FEATURES: INTERNAL THREAD 0.375-16 UNC-2B AND EXTERNAL THREAD 0.563-12 UNC-2A MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: UNC