Description
Overview:
This clamping ring is a genuine Stihl part for ride‐on lawn mowers, built to secure components firmly in place and maintain reliable operation. Manufactured from durable metal, it provides a precise, stable clamp where a positive, non-slip hold is needed on the mower. It is suitable for use across the Stihl RT and MT series, including the RT 6112.1 ZL and RT 6112.0 ZL. The ring helps prevent movement, vibration and premature wear by keeping assemblies correctly fastened. Being an OEM component, it matches the original dimensions and fit required by Stihl systems, supporting consistent performance and straightforward maintenance. OEM No. 9991 003 0545 identifies the correct part for replacement during servicing or repair of compatible machines.
Key Features:
- Genuine Stihl OEM part for assured fit and quality (OEM No. 9991 003 0545)
- Durable metal construction designed for long service life in mower environments
- Maintains secure clamping force to reduce loosening, vibration and wear
- Direct replacement for the original ring on listed Stihl RT and MT models
- Accurate tolerances support correct assembly alignment and performance
- Easy to install with basic hand tools during routine servicing
- Helps restore reliability when the original ring is worn, bent or missing
- Suitable for preventive maintenance to keep fastened joints secure
Typical Applications:
Used on ride‐on lawn mowers to clamp and retain mating parts on deck, chassis or drive-related assemblies where a firm, repeatable hold is required. Commonly fitted during blade deck servicing, belt and pulley work, guard or bracket refits, and general overhaul tasks to ensure components remain correctly seated under vibration and load.
Also known as:
Clamp ring, locking ring, securing ring, retainer ring, fixing ring, hold‐down ring, fastening ring. Terms vary by workshop practice, but all refer to a ring used to apply uniform clamping to keep parts in position on compatible Stihl mowers.
Fits Models:
RT 6112.1 ZL, RT 6112.0 ZL, RT 6127.0 ZL, RT 6127.1 ZL, MF 860, MF 880, MF 890 PRO, MT 5097.0, MT 5097.0 C, MT 5097.0 K, MT 5097.0 Z, MT 6112.0, MT 6112.0 C, MT 6112.0 K, MT 6112.0 ZL, MT 6112.1 ZL, MT 6127.0 KL, MT 6127.0 ZL, MT 6127.1 ZL, MT 740, MT 745, MT 780, MT 785, MT 785 S, MT 790, MT 795
Alternate Part Numbers:
9991-003-0545, 99910030545
Product Specifications
| L&S Part No. | 9991 003 0545 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 99910030545 |
| Unit of Sale | 1 |
| Applications | 2000), MF 860, MF 880, MF 890 PRO, MF860, MF880, MF890PRO, MT 5097.0, MT 5097.0 C, MT 5097.0 K, MT 5097.0 Z, MT 6112.0, MT 6112.0 C, MT 6112.0 K, MT 6112.0 ZL, MT 6112.1 ZL, MT 6127.0 KL, MT 6127.0 ZL, MT 6127.1 ZL, MT 740, MT 740 (1999, MT 745, MT 780, MT 785, MT 785 S, MT 790, MT 795, MT5097.0, MT5097.0C, MT5097.0K, MT5097.0Z, MT50970, MT6112.0, MT6112.0C, MT6112.0K, MT6112.0ZL, MT6112.1ZL, MT61120, MT6127.0KL, MT6127.0ZL, MT6127.1ZL, MT740, MT745, MT780, MT785, MT785S, MT790, MT795, RT 6112.0 ZL, RT 6112.1 ZL, RT 6127.0 ZL, RT 6127.1 ZL, RT6112.0ZL, RT6112.1ZL, RT6127.0ZL, RT6127.1ZL |
| Machine Type | Mowers |
| Fits Brands | Stihl |
| Fits Models | RT 6112.0 ZL | RT 6127.0 ZL | MF 880 | MF 890 PRO | MF 860 | MT 5097.0 | MT 5097.0 C | MT 5097.0 K | MT 5097.0 Z | MT 6112.1 ZL | MT 6127.1 ZL | MT 6112.0 | MT 6112.0 K | MT 6112.0 C | MT 6112.0 ZL | MT 6127.0 KL | MT 6127.0 ZL | MT 745 | MT 785 | MT 740 | MT 780 | MT 780 (1999) | MT 785 S | MT 740 (1999, 2000) | MT 790 | MT 795 | RT 6112.1 ZL | RT 6127.1 ZL |
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