FNZ507 / NH607041 Nut to hold the oil filter head on to Nuffield, Leyland and Marshall tractor engines.  7/16 inch UNF standard nut.

Fitted to engines:

BMC 2.6 litre 3 cylinder diesel 
BMC 3.4 litre 4 cylinder diesel 
BMC 2.8 litre 3 cylinder diesel 
BMC 3.8 litre 4 cylinder diesel 
Leyland 4/98 4 cylinder diesel
Leyland 6/98 4 cylinder diesel
BMC 5.1 and BMC 5.7 6 cylinder diesel 

See item 15 in the parts illustration.

Fitted to tractors:

• Nuffield Universal Three (3DL), Nuffield Universal Four (4DM)
• Nuffield 342, 460, 10/42, 10/60, 3/45, 4/65
• Leyland 344, 384, 255, 270, 262, 272, 462, 472, 282, 482, 602, 604, 702, 704, 802, 804
• Leyland 285, 2100, 485, 4100
• Marshall 602, 604, 702, 704, 802, 804, 902XL, 904XL