We've received your request for M21-4 (described as Pneumatic Muffler E), manufactured by Holt Bros with CAGE code 25496. This part is registered under NSN 4330-00-800-1851, classified in FSG / FSC . Our verification process will confirm traceability through supporting identifiers including NIIN 00-800-1851, NCB code 00 (origin: USA), and INC 37112. Please submit your formal quotation request to proceed.
Thank you for choosing Aerospace Exchange for your M21-4 requirements. We specialize in authenticated aerospace components, offering both NSN-tracked military parts and commercial equivalents, all validated through our rigorous sourcing protocols.
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| MRC | Criteria | Characteristic |
|---|---|---|
| ARNH | Operating Position | UNIVERSAL |
| ARNN | Inlet Flange Mounting Hole Diameter | 0.750 INCHES NOMINAL |
| ARTK | Outlet Projection Length | 3.000 INCHES NOMINAL |
| ADAV | Overall Diameter | 14.000 INCHES NOMINAL |
| APGF | Design Type | DRY |
| ACQW | Inlet Connection Type | FLANGE |
| MATT | Material | STEEL |
| AQXP | Inlet Connection Quantity | 1 |
| ARNA | Coolant Type | AIR |
| ARND | Muffler Design | ANY ACCEPTABLE |
| ARNK | Inlet Projection Length | 3.000 INCHES NOMINAL |
| ARNL | Inlet Flange Shape | ROUND |
| MRC | Decoded Requirement | Clear Text Reply |
| ARTG | Outlet Connection Quantity | 1 |
| ARTH | Outlet Connection Type | FLANGE |
| ARTM | Outlet Flange Mounting Provision And Quantity | 8 HOLES |
| ARTN | Outlet Flange Mounting Hole Diameter | 0.750 INCHES NOMINAL |
| ARNG | Body Shape | ROUND |
| ARNJ | Inlet Location | CENTERED ON END OF BODY |
| ARNM | Inlet Flange Mounting Provision And Quantity | 8 HOLES |
| ARNT | Inlet Flange Mounting Provision Spacing | EQUALLY SPACED ON A 7.500 IN. BOLT CIRCLE |
| ABHP | Overall Length | 34.000 INCHES NOMINAL |
| ARTJ | Outlet Location | CENTERED ON END OF BODY |
| ARTL | Outlet Flange Shape | ROUND |
| ARTT | Outlet Flange Mounting Provision Spacing | EQUALLY SPACED ON A 7.500 IN. BOLT CIRCLE |
| End Use : 21180 | Industrial machines, other |
|---|---|
| Schedule B : 8487900080 (NAICS 333999) | Machinery parts not containing electrical features, and not specified or included elsewhere in chapter 84, except ships propellers |
| SITC : 74999 | Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, n.E.S. |
| CRITL | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
|---|---|
| HMIC | N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials. |
| PMIC | A - Item does not contain precious metal. |
| AAC | L |
|---|---|
| Classification Control | U |
| MGMT_CTL | 9b----- |
| Quantity per pack | 1 |
| Repariability | |
| Shelf Life | N/A |
| SOS | Sms |
| Unit of Measure | Ea |
| ACC: | V - Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing |
|---|---|
| ADC: | A - Shipment is not a consolidation and does not exceed 84 inches in any dimension. |
| LTL: | W - Rating variable |
| NMFC: | 125850 - Muffler/exhaust sys/pipe/etc |
| SHC: | 9 - Other or no special handling required (sh) |
| TCC: | Z - No special type of cargo code applicable |
| WCC: | 594 - Pumps and parts, (machinery and parts),(less than 35 feet) |
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AS9120B and ISO 9001:2015 |
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Aviation Suppliers Association Member |
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FAA AC 0056B Accredited |
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AS 6081:2012 Certification |
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ESD S20.20-2014 Certification |
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