7/16 in Carbon Steel Self Locking Thread Insert with 1/4-20 Internal Thread Size, 10 PK/ THREAD DIRECTION: RIGHT-HAND LENGTH: 0.438 INCHES NOMINAL END ITEM IDENTIFICATION: TOOLS AND SHOP SETS PART NAME ASSIGNED BY CONTROLLING AGENCY: E-Z LOK THREAD INSERT SPECIAL FEATURES: INTERAL THREAD 0.250-20 UNC-2B AND EXTERNAL THREAD 0.438-14 UNC-2A MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: UNC