Fiat Grand Gathering 2027 - a weekend for Fiat group enthusiasts. 16 to 18 April 2027, North East Victoria.

Parts Catalogue with Torque Settings

The factory parts catalogue drawings, with the tightening torque printed beside each fastener's part number. Pick a section, then a page. Change the units and every value on the page changes with it.

Live test page. Drawings from the Factory parts catalogue and the Linea Rossa catalogue (1974-88). Torques from every X1/9 book in the library: the 1978 Australian service data, the five-speed 1500 and Speciale 1300 Data & Characteristics manuals, both USA service manuals, the workshop manual and the Fiat service letters. Matched to the catalogue by part number and checked against the scanned pages. Where the books disagree the label is amber and shows every figure they give; tap it to see which book says what.

No figure in the books? Torque by thread size

Fiat's torques follow the size of the thread closely. This table groups every M6 to M20 figure printed against a part number in the three part-numbered books (the 1978 Australian service data, the five-speed 1500 and the Speciale 1300 Data & Characteristics manuals): 236 figures in all. Most fasteners of each size use the "most common" figure, and nearly all sit inside the range. So if no book gives a torque for a nut or bolt, it will almost certainly be somewhere in that range. Where in the range depends on what it holds and what it screws into.

ThreadPitch on the X1/9Usual spannerMost commonRange in the booksLow end (examples)High end (examples)

Where in the range?

  • Into aluminium: stay low. The head, cam box and gearbox casing are aluminium, and an aluminium thread strips well before a steel bolt is at full tension. The cam box bolts are M8 at against for a typical M8, and the gearbox covers are M6 at .
  • Rubber, gaskets and thin covers: low end. Engine rubber mounts, damper pads, pedal and steering column brackets and cover plates all sit well under the usual figure, so they don't crush the rubber or distort the cover.
  • Steel to steel, in a nut or a steel part: the usual figure or a little over. Bell housing, alternator brackets, suspension arms.
  • The high end needs a harder bolt. The flywheel, cam gear and main bearing cap bolts are M10 at , about 70% over a typical M10, because those bolts are a higher grade. Never put those figures on an ordinary bolt.
  • Ball-joint tapers and the steering wheel nut follow their own rules. The M14x1 track rod end nut is only , and the M16 steering wheel nut is also .
  • Check the pitch, but it matters less than the size. Fiat used fine threads (1.25 mm) on most M10 and M12 bolts, where a standard bolt is 1.5 or 1.75. For the same torque a fine thread clamps a little harder, so a coarse-thread bolt of the same size usually takes about the same figure, within about 10%. Pitch moves the figure far less than the size, the bolt's grade or what it screws into. The low M14x1 track rod end figure is low because it is a ball-joint taper, not because of the fine thread. A fine thread in aluminium strips more easily, so keep those at the low end.
  • Clean threads. Oil or grease on a thread gives more clamping for the same torque. Only oil a thread where the book says to, as it does for the head bolts.
  • Safety parts: find the real figure. Brakes, steering, suspension, wheels and hubs, the flywheel, con rods and the head should never be done from this table. Look them up on the drawings below.