321574R91
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An item designed to fit over the opening of an engine exhaust pipe or muffler to prevent the entrance of rain or foreign matter into the manifold section of a reciprocating engine while not in use. It is automatically opened when the engine is started by pressure exerted from the exhaust system. It is equipped with a hinging action and may or may not have a counter weight. Excludes:cap, protective, dust and moisture seal.
2.688 inches pipe outside diameter accommodated, w/mounting hardware special features, steel material
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Pipe Outside Diameter Accommodated
- 2.688 inches
- Special Features
- w/mounting hardware
- Material
- steel
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 2990-00-058-6567 | No Name Available | 01/01/1977 |
| 2990-00-419-9230 | No Name Available | 05/01/1977 |
| 2990-00-489-5911 | No Name Available | 03/01/1977 |
| 2990-00-497-1878 | No Name Available | 03/01/1977 |
| 2990-00-570-9404 | No Name Available | 12/01/1976 |
| 2990-00-630-0053 | No Name Available | 02/01/1978 |
| 2990-00-813-8208 | No Name Available | 08/30/1972 |
| 2990-00-821-2063 | No Name Available | 05/01/1977 |
| 2990-00-891-6784 | No Name Available | 08/30/1972 |
| 2990-00-920-0942 | No Name Available | 08/30/1972 |
| 2990-00-927-4217 | No Name Available | 03/01/1977 |
| 2990-00-947-6064 | No Name Available | 01/01/1977 |
| 2990-01-480-9201 | No Name Available | 07/01/2019 |
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| 11007SIZE6 | Muffler- Protective Cap Assembly |
| 13217E0544 | Muffler- Protective Cap Assembly |
| 13217E0544-2 | Muffler- Protective Cap Assembly |
| 283280R91 | Muffler- Protective Cap Assembly |
| 321574R91 | Muffler- Protective Cap Assembly |
| 538454 | Muffler- Protective Cap Assembly |
| 538800-2 | Muffler- Protective Cap Assembly |
| 565317 | Muffler- Protective Cap Assembly |
| 64180M91 | Muffler- Protective Cap Assembly |
| 66C43118 | Muffler- Protective Cap Assembly |
| 71277-7 | Muffler- Protective Cap Assembly |
| 764180M91 | Muffler- Protective Cap Assembly |
| 77-250 | Muffler- Protective Cap Assembly |
| 7X | Muffler- Protective Cap Assembly |
| C4-30 | Muffler- Protective Cap Assembly |
| D28028 | Muffler- Protective Cap Assembly |
| FB0019 | Muffler- Protective Cap Assembly |
| P27-0534 | Muffler- Protective Cap Assembly |
| Q88-29 | Muffler- Protective Cap Assembly |
| RC-250 | Muffler- Protective Cap Assembly |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 2990-00-122-0658?
Does the NSN 2990-00-122-0658 have a Schedule B code assigned?
Does NSN 2990-00-122-0658 require demilitarization?
Does NSN 2990-00-122-0658 contain precious materials?
Does NSN 2990-00-122-0658 contain hazardous materials?
When the NSN 2990-00-122-0658 was assigned to the Federal Catalog?
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Pricing
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