Are you looking to have it delivered today or tomorrow? Our team here at Unlimited NSN can help. Unlimited NSN is one of the leading U.S. distributors of helicopter rotor drive system parts and other new, old, or obsolete aviation parts, including 012C, 01960, 220-242400-09, 31M22972*, 5541K11. Owned and operated by ASAP Semiconductor, Unlimited NSN has sold 100 million parts to date. ASAP Semiconductor is an ISO 9001:2015 certified company with an FAA AC-056B accreditation, and is also a member of the Aviation Suppliers Association (ASA).
We are proud to offer an inventory of over two billion ready-to-ship aircraft and helicopter rotor drive system parts, 24/7 availability, and key locations in the United States, United Kingdom, and Canada. These attributes allow us to meet all aircraft on ground (AOG) requirements with ease. Use our optimized search engine to find your required helicopter rotor drive system parts then submit an instant RFQ for a quick, competitive quote. Here at Unlimited NSN, we make your purchasing process as simple and efficient as possible.
| Part No | Description | RFQ |
|---|---|---|
| 012C | O-Ring | RFQ |
| 01960 | Bead Chain | RFQ |
| 220-242400-09 | Clip | RFQ |
| 31M22972* | Engine Starter Ring Gear Assembly (supersedes LW-16471* and 31M21951* starter ring gear assembly used on O-540 engine) | RFQ |
| 5541K11 | Pipe Wrap (self-adhesive) | RFQ |
| A101-4 | Rod End | RFQ |
| A15A | Diode | RFQ |
| A185-1 | Bracket | RFQ |
| A185-2 | Bracket | RFQ |
| A185-3 | Plate | RFQ |
| A185-5 | Bracket | RFQ |
| A215-017 | O-Ring | RFQ |
| A215-020 | O-Ring | RFQ |
| A215-029 | O-Ring | RFQ |
| A215-042 | O-Ring | RFQ |
| A215-152 | O-Ring | RFQ |
| A215-156 | O-Ring | RFQ |
| A215-222 | O-Ring | RFQ |
| A215-382 | O-Ring (use only with C263-2 sump) | RFQ |
| A257-19 | Lubricant | RFQ |
| A257-2 | Oil - Gearbox (one-gallon bottle) | RFQ |
| A257-2LT | Oil - Gearbox (one-liter bottle) | RFQ |
| A257-4 | Oil - Type “A” ATF (Dexron III) | RFQ |
| A650-4 | Fitting | RFQ |
| A653-2* | Mount (supersedes A653-1; if replacing a -1 mount replace both forward mounts) | RFQ |
| A654-56 | Decal | RFQ |
| A7260 | Chip Detector | RFQ |
| A938-3 | Mount - Test Switches | RFQ |
| A938-5 | Mount - Test Switches | RFQ |
| AGC-1.5 | Fuse (1.5 amp, for 28-volt ships) | RFQ |
| AGC-3 | Fuse (3 amp, for 14-volt ships) | RFQ |
| AN3-41A | Bolt | RFQ |
| AN316-5R | Nut | RFQ |
| AN320-8 | Nut (B270-11 on threads) | RFQ |
| AN526C832R6 | Screw | RFQ |
| AN742-3 | Clamp | RFQ |
| AN814-8D | Filler Plug | RFQ |
| AS111 | O-Ring | RFQ |
| B033-6 | Knob Assembly - Rotor Brake | RFQ |
| B033-6 | Knob Assembly (includes knob and chain) | RFQ |
| B049-3 | Harness Assembly | RFQ |
| B115-1 | Bearing | RFQ |
| B125-2 | Connector | RFQ |
| B157-1 | Mount | RFQ |
| B158-12 | Heat Shrink | RFQ |
| B158-2 | Heat Shrink | RFQ |
| B158-3 | Heat Shrink (around wires, terminals) | RFQ |
| B158-6 | Heat Shrink (around fuse holder) | RFQ |
| B158-8 | Heat Shrink | RFQ |
| B158-8 | Heat Shrink (14-volt ships) | RFQ |
| B263-1 | Pin | RFQ |
| B263-12 | Housing (14-volt ships) | RFQ |
| B263-14 | Housing (28-volt ships) | RFQ |
| B263-15 | Housing | RFQ |
| B263-18* | Housing | RFQ |
| B263-19* | Housing | RFQ |
| B263-3 | Pin | RFQ |
| B270-10 | Adhesive | RFQ |
| B270-2 | Sealant - Metal (silver) | RFQ |
| B289-3 | Screw | RFQ |
| B320-2 | Sender Assembly | RFQ |
| B330-13 | Palnut | RFQ |
| B330-16 | Palnut | RFQ |
| B330-19 | Palnut | RFQ |
| B566-1* | Chip Detector | RFQ |
| B570-1 | Magnet Assembly | RFQ |
| BP4100 | Pulley | RFQ |
| C006-1 or -3 | Main Rotor Gearbox and Mast Assembly | RFQ |
| C006-2 | Rotor Brake Assembly | RFQ |
| C006-6* | Main Rotor Gearbox and Mast Assembly | RFQ |
| C006-7* | Main Rotor Gearbox and Mast Assembly | RFQ |
| C006-8* | Main Rotor Gearbox and Mast Assembly | RFQ |
| C006-8R* | C006-8 Main Rotor Gearbox and Mast Assembly | RFQ |
| C007 | Shaft and Bearing Assembly | RFQ |
| C007-5 | Shaft and Bearing Assembly (Incl C181-3 lower bearing) | RFQ |
| C007-5R | C007-5 Shaft and Bearing Assembly (overhaul exchange) | RFQ |
| C018 | Clutch Assembly | RFQ |
| C018-2* | Clutch Assembly | RFQ |
| C018-2R | C018-2 Clutch Assembly (overhaul exchange; includes new C166-4 shaft) | RFQ |
| C018-3* | Clutch Assembly | RFQ |
| C018-3R | C018-3 Clutch Assembly (overhaul exchange; includes new C166-4 shaft) | RFQ |
| C049-2 | Harness Assembly | RFQ |
| C049-4 | Harness Assembly | RFQ |
| C049-5 | Harness Assembly - Overtemp Switch | RFQ |
| C051-1 | Actuator Assembly (14-volt ships) | RFQ |
| C051-1R | C051-1 Actuator Assembly (overhaul exchange) | RFQ |
| C051-1R | C051-2 Actuator Assembly (overhaul exchange) | RFQ |
| C051-2 | Actuator Assembly (28-volt ships) | RFQ |
| C105-2 | Journal | RFQ |
| C146-1 | Gear Set | RFQ |
| C146-5 | Gear Set | RFQ |
| C166-4 | Shaft - Clutch | RFQ |
| C167-3 | Housing | RFQ |
| C167-5 | Housing | RFQ |
| C168-4 | Retainer | RFQ |
| C168-5 | Retainer | RFQ |
| C181-3 | Bearing | RFQ |
| C182-1 | Nut | RFQ |
| C184-2 | Bearing Assembly - Upper | RFQ |
| C184-2R | C184-2 Bearing Assembly - Upper (overhaul exchange) | RFQ |
| C191-1 | Block | RFQ |
| C215-029 | O-Ring (lubricate with A257-1 grease) | RFQ |
| C215-279 | O-Ring (use only with C263-1 sump) | RFQ |
| C244-1 | Bracket | RFQ |
| C251-1 | Shaft - Main Rotor Drive | RFQ |
| C251-2 | Shaft - Main Rotor Drive | RFQ |
| C257-2 | Cover | RFQ |
| C261-1 | Mast Fairing Assembly | RFQ |
| C264-1 | Housing | RFQ |
| C264-2 | Housing | RFQ |
| C270-1 | End Cover | RFQ |
| C273-1 | Roof | RFQ |
| C273-1 | Roof Panel | RFQ |
| C283-1 | Mast Assembly | RFQ |
| C553-1 | Block | RFQ |
| C647-1 | Bearing (main rotor shaft upper bearing) | RFQ |
| C648-2 | Bearing - Journal | RFQ |
| C653-3* | Mount | RFQ |
| C747-1 | Baffle Assembly | RFQ |
| C947-1 | Flex Plate Assembly | RFQ |
| C966-3 | Seal | RFQ |
| C966-5 | Seal | RFQ |
| C967-1 | Plug | RFQ |
| D049-4 | Harness Assembly | RFQ |
| D110-1 | Arm Assembly - Upper | RFQ |
| D110-1 | Arm Assembly | RFQ |
| D111-1 | Bracket | RFQ |
| D112-1 | Lever | RFQ |
| D113-1 | Link | RFQ |
| D113-2 | Link | RFQ |
| D114-1 | Bracket | RFQ |
| D117-1 | Guard | RFQ |
| D117-2 | Guard | RFQ |
| D118-1 | Bracket Assembly | RFQ |
| D122-1 | Bracket Assembly | RFQ |
| D122-6 | Plate | RFQ |
| D123-1 | Arm Assembly | RFQ |
| D123-1 | Arm Assembly - Lower | RFQ |
| D126-1 | Cable Assembly | RFQ |
| D174-2 | Fanwheel Assembly | RFQ |
| D174-2R | D174-2 Fanwheel Assembly (overhaul exchange) | RFQ |
| D210-10 | Nut | RFQ |
| D210-3 | Nut | RFQ |
| D210-4 | Nut | RFQ |
| D262-11 | Fuse Holder | RFQ |
| D276-1 | Gearmotor Assembly (14-volt ships) . | RFQ |
| D276-3 | Gearmotor Assembly (28-volt ships) . | RFQ |
| D500-1 | Pump | RFQ |
| D796-1 | Duct Assembly | RFQ |
| F283-3 | Mast Assembly | RFQ |
| KI-202 | Retainer Upgrade Kit | RFQ |
| MS20074-04-04 | Bolt (earlier non-hydraulic R44s) | RFQ |
| MS20426AD3 | Rivet | RFQ |
| MS20426AD4 | Rivet (at outboard positions) | RFQ |
| MS20470AD4 | Rivet | RFQ |
| MS20995C32 | 0.032 in. dia. Safety Wire | RFQ |
| MS20995C41 | 0.041 in. dia. Safety Wire | RFQ |
| MS21042L04 | Nut | RFQ |
| MS21042L06 | Nut | RFQ |
| MS21042L08 | Nut | RFQ |
| MS21042L3 | Nut | RFQ |
| MS21042L4 | Nut | RFQ |
| MS21042L5 | Nut | RFQ |
| MS21042L6 | Nut | RFQ |
| MS21075L3E | Nutplate | RFQ |
| MS24566-1B | Pulley (or AN210-1A) | RFQ |
| MS24566-1B | Pulley (supersedes AN210-1A) | RFQ |
| MS24665-134 | Cotter Pin | RFQ |
| MS24665-283 | Cotter Pin | RFQ |
| MS27039C0806 | Screw | RFQ |
| MS27039C0812 | Screw | RFQ |
| MS27039C1-07 | Screw | RFQ |
| MS27039C1-09 | Screw | RFQ |
| MS27039C1-11 | Screw | RFQ |
| MS35206-219 | Screw | RFQ |
| MS35206-228 | Screw | RFQ |
| NAS1304-15 | Bolt | RFQ |
| NAS1352-08LE6P | Screw | RFQ |
| NAS1352-4-12 | Screw | RFQ |
| NAS1352-4-16 | Screw | RFQ |
| NAS1352-4-30 | Screw | RFQ |
| NAS428-3-14 | Bolt | RFQ |
| NAS428-3A-14 | Bolt | RFQ |
| NAS6603-10 | Bolt | RFQ |
| NAS6603-11 | Bolt | RFQ |
| NAS6603-12 | Bolt | RFQ |
| NAS6603-24 | Bolt | RFQ |
| NAS6603-28 | Bolt | RFQ |
| NAS6603-40 | Bolt | RFQ |
| NAS6603-8 | Bolt | RFQ |
| NAS6604-11 | Bolt | RFQ |
| NAS6604-13 | Bolt | RFQ |
| NAS6604-21 | Bolt | RFQ |
| NAS6605-38 | Bolt | RFQ |
| NAS6605-42 | Bolt | RFQ |
| NAS6606-31 | Bolt | RFQ |
| NAS6606-5 | Bolt | RFQ |
| NAS6608H42 | Bolt | RFQ |
| NAS9301B-4-02 | Rivet | RFQ |
| R8206 | C283-3 Mast Tube Upgrade Kit | RFQ |
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