| IR 3940P Impact Wrench PartsList | |||
| Item | Part Number | Part Description | IR Equivalent |
| 1 | Motor Housing | 3940P-A40 | |
| 2 | Warning Label | WARNING-2-99 | |
| 3 | 9359 | Inlet Bushing | 2940P-A565 |
| 4 | 9464 | Deflector | 2940P-23 |
| 5 | 8567 | Silencer (exhaust) | 2940P-311 |
| 6 | Throttle Valve Bushing | 3940P-A302 | |
| 7 | Trigger | 3940P-93 | |
| 8 | Bushing | 293-A503 | |
| 9 | 8571 | O-Ring (throttle valve bushing / large) | AD100-18 |
| 10 | 8573 | O-Ring (throttle valve bushing / small) | AFH120A-358 |
| 11 | 8400 | O-Ring | PS3-67 |
| 12 | 8140 | O-Ring (throttle valve) | 293-134 |
| 13 | 8144 | O-Ring (throttle valve stem) | 293-669 |
| 14 | 9417 | Pin (48951-176, 49440-98) | AF120-322 |
| 15 | Pin | 2940P-757 | |
| 16 | 8579 | Gasket (air port seal) | R44H-210A |
| 17 | 8350 | Retainer (air port seal) | 2940-200 |
| 18 | Reverse Valve Assembly | 3940P-A329 | |
| 19 | 8283 | Seal | 85H-167 |
| 20 | Forward Reverse Lever | 3940-658A | |
| 21 | Housing Cover Assembly | 3940P-A102 | |
| 22 | Grease Fitting | 130SR-188 | |
| 23 | 8561 | Plunger (reverse lock) | 4U-663B |
| 24 | 8562 | Spring | 4U-664-10 |
| 25 | Handle Cap Screw | 3940-638 | |
| 26 | 9564 | Motor Clamp Washer | 2934-207 |
| 27 | 8077 | Housing Cover Gasket | 3940P-283 |
| 28 | Cylinder Dowel | 3934-98 | |
| 29 | 8559 | Bearing | 508-97 |
| 30 | 8175 | End Plate (rear) | 2934-12 |
| 31 | Rotor | 3934-53 | |
| 32 | 2158 | Rotor Vane (7 required) | 2934-42-7 |
| 33 | 9707 | Cylinder | 2934-3 |
| 34 | Front End Plate | 3940-11 | |
| 35 | 8560 | Bearing | 810-97 |
| 36 | 8071 | Gasket, Hammer Case | 3940-36 |
| 37 | 9052 | Hammer Frame | 2940-A703 |
| 38 | 8139A | Hammer Pin with Head | 2940-704 |
| 38 | 8139B | Hammer Pin without Head | 2940-704 |
| 39 | 8138 | Hammer | 2940-724 |
| 40 | 9053 | Anvil (1" square drive) | 2940-726 |
| 41 | Hammer Case ASM-Titanium | 3940-D727 | |
| 42 | 9338 | Bushing | 2934-641 |
| 43 | Dead Handle Bracket | 3940-364 | |
| 44 | 8754 | Dead Handle | 3940-48 |
| 45 | Cap Screw | 3955-638 | |
| 46 | Socket Retaining Ring (2-1/8") | RR10015S | |
| 50 | 9988 | Tune-up Kit (includes illustrated parts 5, 9, 10 (2), 11, 12, 13, 16(2), 17(2), 19, 23, 24, 27, 29, 32, 35, 36) | 3940P-TK1 |
