This key switch is MADE IN THE USA and is a drop-in replacement for the OEM switch. It uses the same key as your other Olivers & Whites and won’t require different style wire terminals. It replaces the following AGCO part number: 20-7101027 and 105232AS. The keys replace AGCO part number 30-3106306. This switch does include the nuts and washers. This is a great match for the gear-reduction starters we also sell. This switch fits the following Oliver and White tractors: Oliver Super 55, 550, 660, 770, 880, 950, 1550, 1555, 1600, 1650, 1655, 1750, 1755, 1800, 1855, 1900, 1950, 1955, 2150 2255 plus many others. White 100, 140, 160, 2-70, 2-85, 2-88, 2-105, 2-110, 2-135, 2-150, 2-155, 2-180, 4-150, 4-175, 4-180, 4-210, 4-225 and 4-270 plus others.Please look at the photos to make sure you are ordering the correct parts.See and read more information about Our Parts at our Web Site MSFPARTS Thank you for your interest.SHIPPING We do our best to ship within 24 hours of receiving your order. Depending on where you live, we will use the Post Office, SPEE-DEE or UPS to get your shipment to you as quickly as possible.If you order multiple items, please do not pay for them until I can invoice you with the correct shipping charges.We do offer free pickup of your parts at our farm in Verona, WI.If you have a special request for shipping, please contact us.