This is a A-R123271 Stud, Rocker Arm Support PN: R123271Main Description As Following : A-R123271 Stud, Rocker Arm Support P.N: R123271 A-R123271 Stud, Rocker Arm Support P.N: R123271 Found in Section & Models : Engine Parts > Engine Related Parts, John Deere BACKHOE: 310G, John Deere BACKHOE: 310J, John Deere BACKHOE: 310K, John Deere BACKHOE: 310K EP, John Deere BACKHOE: 310L, John Deere BACKHOE: 310L EP, John Deere BACKHOE: 310SE, John Deere BACKHOE: 310SG, John Deere BACKHOE: 310SJ, John Deere BACKHOE: 310SK, John Deere BACKHOE: 310SL, John Deere BACKHOE: 310SL HL, John Deere BACKHOE: 315SE, John Deere BACKHOE: 315SG, John Deere BACKHOE: 315SJ, John Deere BACKHOE: 315SK, John Deere BACKHOE: 315SL, John Deere BACKHOE: 325J, John Deere BACKHOE: 325SK, John Deere BACKHOE: 325SL Associated Items : New Also A-JD-S-SM2046, A-JD-S-SM2019, A-JD-O-OMR51902, A-JD-S-TM1053 And : Head Size: 5/8" hex head between threads Overall Length: 3.44" Thread: Shorter thread is M8 X 1.25 RH thread .48" long Longer thread is M10 X 1.5 RH thread 1.34" long