1-7/16"ID X 2-1/4"OD X 3/4"W Steel Zinc Solid Set Screw Collar / OUTSIDE DIAMETER: 2.250 INCHES NOMINAL THICKNESS: 0.750 INCHES NOMINAL END ITEM IDENTIFICATION: 4220-01-617-9405 COMPRESSOR,DIVE TYPE I SECURING HOLE QUANTITY: 1 SECURING HOLE TYPE AND LOCATION: THREADED SINGLE HOLE SCREW THREAD QUANTITY PER INCH AND LOCATION: 16 SINGLE HOLE NOMINAL THREAD SIZE AND LOCATION: 0.375 INCHES SINGLE HOLE MATERIAL: STEEL COMP 1045 MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 1045 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1045 ASSN STD SINGLE MATERIAL RESPONSE SURFACE TREATMENT: ZINC STYLE DESIGNATOR: A1 PLAIN ROUND