Wilson Fat Shaft Irons Specifications
Full factory loft, lie and length chart for the Wilson Fat Shaft irons, 1998–2002.
- Years produced
- 1998–2002
- Category
- Game Improvement Irons
- Construction
- cast cavity back
- Material
- stainless steel
- Set makeup
- 1–SW
Data confidence: medium. These figures are compiled from secondary sources rather than a manufacturer spec sheet. If you have an original catalogue page, send it over and we will update the chart.
Loft, lie & length chart
| Club | Loft (°) | Lie (°) | Length (in) |
|---|---|---|---|
| 1 | 16 | 58 | 40.5 |
| 2 | 18 | 59 | 40 |
| 3 | 21 | 60 | 39.5 |
| 4 | 24 | 61 | 39 |
| 5 | 27 | 62 | 38.5 |
| 6 | 30 | 62.5 | 38 |
| 7 | 33 | 63 | 37.5 |
| 8 | 37 | 64 | 37 |
| 9 | 41 | 64.5 | 36.5 |
| PW | 45 | 65 | 36 |
| GW | 50 | 65 | 36 |
| SW | 55 | 65 | 36 |
Lofts and lies are the factory standard build. Individual clubs may differ if they have been bent, re-shafted or re-gripped during their life.
About the Wilson Fat Shaft
The Fat Shaft irons introduced Wilson's best-known late-90s technology: a shaft with a hugely oversized tip — .500 inch against the conventional .370 — running straight into the head to stiffen the hosel zone and cut head twist on mishits. The heads themselves are oversized stainless cavity backs with upright lies by the standards of the day. Wilson kept the recipe through several catalog years (FS Fat Shaft, Fat Shaft, and Fat Shaft RM/Tour variants) before folding the technology into the Deep Red line from 2002.
Stock shafts
- Wilson Platinum Steel (.500 tip) — steel
- Wilson Hyper Carbon (.535 tip) — graphite
Related models
Frequently asked questions
What is the loft of a Wilson Fat Shaft 7-iron?
The Wilson Fat Shaft 7-iron has a loft of 33 degrees, a lie of 63 degrees and a length of 37.5 inches.
What made the Wilson Fat Shaft irons different?
The shaft tip measured .500 inch — far larger than the conventional .370 — which stiffened the hosel area and reduced head twisting on off-centre hits. Replacement shafts must be Fat Shaft-specific because of that tip diameter.
Are Fat Shaft lies upright?
Yes. At 63 degrees on the 7-iron and 65 on the wedges, the Fat Shaft ladder runs one to two degrees more upright than the typical late-90s spec.
Finding a used set
The Wilson Fat Shaft ran from 1998 to 2002 and is no longer in production, so the used market is the only source. Search eBay, 2nd Swing, Golf Avenue and the PGA Tour Superstore trade-in listings, and check the loft and lie against the chart above before buying — sets this age have often been bent from standard.
- GolfClubSpec.com 'Wilson Staff Fat Shaft' entry (https://www.golfclubspec.com/iron_results.php?id=129, listed to the 2000 catalog year) — supplied every loft, lie and length above plus the Wilson Platinum Steel (.500 tip) and Hyper Carbon (.535 tip) stock shafts
- GolfClubSpec.com 'Wilson Staff FS Fat Shaft' entry (id=128, 1999 catalog year) — the launch-era listing; lofts and lengths are identical to the table above and lies agree within half a degree through the short irons, so the 2000 listing is used as the cleaner of the two
- The Fat Shaft iron family reached retail in 1998; GolfClubSpec's entries are catalog-year listings of the same model, and later Fat Shaft RM/Tour Cast variants (ids 130, 161, 194) carry different specs and are separate models. year_discontinued 2002 reflects the Deep Red irons that took over the Fat Shaft technology
- Offset, bounce and swing weight were not published for this model and are omitted; confidence is medium
Last reviewed 2026-07-29. Spot an error? [email protected]