John Deere Original Equipment Extension Spring - E78684

John Deere Original Equipment Extension Spring - E78684 Part Specification: End Type (ALPHA) 02/02 Wire Diameter (IN) 0.1051 Outside Diameter (IN) 0.8551 Free Length (IN) 3.8189 Spring Rate (LBF/in or N/mm)(LBF/IN) 16.9020 Initial Tension (LBF or N)(LBF) 7.9987 Number of Coils (Unity) 25.0000 Material (ALPHA) A15-7 Finish (ALPHA) B-Zinc-Electro Plated Note (D) Hooks 90 Degrees Fits the following John Deere models: Baler: 42, 327, 337, 336, 339, 346. Round Baler: 446, 546, 447, 448, 449, 456, 556, 457, 557, 458, 458STD, 458S, 459, 459SS, 459STD, 459E, 466, 566, 467, 567, 468, 468S, 469PR, 469, 469SS, 547, 558, 559, 559SS, 568, 569PR, 569, 569SS, 430, 530, 440E, 450E, 450M, 451E, 451M, 460M, 460R, 461M, 550M, 551M, 560M, 560R, 561M. Conditioner Mower: 1209, 1217, 1219. This is an O.E.M. John Deere part.