3/8" 316 Stainless Steel Small OD Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 0.401 INCHES MINIMUM AND 0.411 INCHES MAXIMUM PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.043 INCHES MINIMUM AND 0.057 INCHES MAXIMUM OVERALL DIAMETER: 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM END ITEM IDENTIFICATION: 3990-01-588-3373 PART NAME ASSIGNED BY CONTROLLING AGENCY: 3/8 316 STAINLESS STEEL SMALL OD FLAT WASHER COLOR: SILVER OVERALL MATERIAL: STEEL COMP 316 OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL