Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number RW4 820662-1 found under Gage Pressure Dial Indicating by David Brown Gear Systems Limited. The National Stock Number assigned to this part is 6685011914769, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like RW4 820662-1.