2 Genuine Toro 112-3977 Shoulder Bolt, 1-603299 Deck Wheel & 3/8-16 Lock Nut Kit
Item Specifics
- Part Number: 112-3977, 1-603299
- Brand: Toro
- Type: Shoulder Bolt, Deck Wheel, Lock Nut Kit
- Quantity: 6 Pieces (2 Bolts, 2 Wheels, 2 Nuts)
- Application: Deck Rollers
Product Description
This comprehensive hardware kit includes two Genuine Toro 112-3977 shoulder bolts, one 1-603299 deck wheel, and two 3/8-16 flange nylon lock nuts. Designed specifically for deck roller applications, this kit provides all the necessary components to secure and maintain your mower’s deck wheels.
Toro has utilized the 112-3977 shoulder bolt in deck roller assemblies since 2007, and it remains the standard for current installations. The genuine Toro flange bolt ensures a precise fit and reliable performance, while the nylon lock nuts are engineered to prevent loosening under heavy vibration.
Replace worn, stripped, or missing hardware with this complete kit to restore proper deck wheel function and extend the life of your equipment. Red Rock Turf provides genuine Toro parts and quality hardware to keep your machinery running at its best.
Included Components
| Part Number | Description | Quantity |
|---|---|---|
| 112-3977 | Shoulder Bolt (Genuine Toro) | 2 |
| 1-603299 | Deck Wheel | 2 |
| 3/8-16 | Flange Nylon Lock Nut | 2 |
Compatible Models
Toro Hardware Kit (Shoulder Bolt, Deck Wheel & Lock Nut) – Grouped Compatible Models
| Category / Mower Series | Model Numbers |
|---|---|
| Groundsmaster 3200 / 3300 Series | 31900, 31901, 31902, 31903, 31907, 31909, 31970, 31971, 31972, 31973, 31974, 31975 |
| XLS Lawn Tractor | 71255 |
| Zero‑Turn (MZ19H / G‑Series) | 725058016, 725058046, 725058056, 725058066, 725058076, 725058086, 94360, 94370, 94372, 94375, 94806, 94818 |
| TimeCutter ZS Series | 74386, 74387, 74389, 74390, 74395, 74655, 74656, 74657, 74660, 74661, 74665, 74667 |
| TimeCutter SS Series | 74616, 74622, 74623, 74624, 74625, 74626, 74627, 74628, 74630, 74631, 74632, 74633, 74635, 74636, 74637, 74638, 74705, 74706, 74711, 74720, 74721, 74722, 74723, 74725, 74726, 74726TA, 74730, 74731, 74732, 74740, 74741 |
| TimeCutter MX Series | 74640, 74641, 74642, 74643, 74727, 74750, 74760, 74760TA, 74765, 74766, 74766TA, 74768, 74770, 74771, 74772, 74773, 74774, 74774TA, 74775, 74776, 74778 |
| TimeCutter SW / SWX Series | 74675, 74676, 74680, 74784, 74785, 74787, 74790, 74793, 74795, 74797, 74798 |
| TimeCutter ZX / Z Series | 74406, 74407, 74603, 74806, 74360, 74363, 74365, 74366, 74370, 74372, 74373, 74374, 74375, 74376, 74380, 74381, 74391, 74398, 74399 |
| TimeCutter General & MyRide | 75740, 75741, 75742, 75742TA, 75742W, 75743, 75744, 75745, 75745TA, 75745W, 75750, 75750W, 75751, 75753, 75754, 75755, 75755TA, 75755W, 75757, 75759, 75760, 75760W |
| Titan / Titan ZX / Titan MX | 74812, 74813, 74814, 74815, 74816, 74818, 74820, 74822, 74823, 74824, 74830, 74832, 74833, 74840, 74841, 74842, 74843, 74845, 74871, 74872, 74873, 74912, 74914, 74920, 74924 |
| Precision Z Series | 81270, 81271 |
Note: Includes shoulder bolt (112-3977), deck wheel (1-603299), and 3/8-16 flange lock nut. Toro has used this hardware since 2007 and continues to use it. Total compatible models: 170+. If unsure, provide model & serial for verification.
Key Details
- Includes two Genuine Toro 112-3977 shoulder bolts
- Includes one 1-603299 deck wheel
- Includes two 3/8-16 flange nylon lock nuts
- Shoulder bolt has been used by Toro since 2007
- Designed for deck roller applications
We at Red Rock Turf are a stocking distributor for Briggs and Stratton, Kohler, Kawasaki and Toro. We don’t only sell their OEM parts but we also use them on our equipment repairs and rebuilds. If there is something you need and don’t see it, then please feel free to get a hold of us, call or text 435-213-5854.














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