Relief Valve 3/4" x 16UNF 2A - RH
Ford
2600, 2610, 2810, 2910, 3600, 3610, 3910, 3930, 4100, 4110, 4600, 4610, 4630, 4830, 5000, 5030, 5110, 5600, 5610, 5640, 6410, 6600, 6610, 6640, 6700, 6710, 6810, 7000, 7600, 7610, 7700, 7710, 7740, 7810, 7840, 7910, 8210, 8240, 8340, 8530, 8630, 8730, 8830, TW15, TW25, TW35, TW5
(5000, 5100, 5200, 5340, 7000, 7100, 7200 with 4.125" bore cylinders) 
Replaces OEM No: 81838679, 83911832, D3NN984C, D5NN984A