2" x 3.750" OD Thru-Hardened Yellow Zinc Finish Steel SAE General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 2.130 INCHES MINIMUM AND 2.193 INCHES MAXIMUM PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.178 INCHES MINIMUM AND 0.196 INCHES MAXIMUM OVERALL DIAMETER: 3.688 INCHES MINIMUM AND 3.813 INCHES MAXIMUM END ITEM IDENTIFICATION: 2330-01-601-0759 PART NAME ASSIGNED BY CONTROLLING AGENCY: SPCR,2.13X3.75X0.178,ST,ZY MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: ASTM F436 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: FM100,PL20,TY I,GR 2,CL B MFR REF SINGLE TREATMENT RESPONSE OVERALL