The Adapter,mechanical Test, cataloged under National Stock Number 4940-01-481-3737, is classified within Federal Supply Class 4940 (Miscellaneous Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4940-01-481-3737 |
| Primary Part Number | 3557AS101-1 |
| Item Name | Adapter,mechanical Test |
| FSC / FSG | 4940 / 49 — Miscellaneous Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Accessory Components and Quantity | QUICK COUPLER 1, P/NAHC21 (CAGE 55719);ADAPTERS 2, P/N AHC21M (CAGE 55719); AIR PRESSURE REGULATOR W/0-20 PSI GUAGE 1, P/NR162I (CAGE 0B8K7); 1/4 TURN AIR VALVE 1, P/NIM10C (CAGE 55719); TUBING TEST PLUGS 2, P/N2552K55 AND 2552K58 (CAGE 39428); CONTAINER 1 |
| Functional Description | A TOOL TO PRESSURIZE THE FUEL VENT SYSTEM TO CHECK THE SYSTEM FOR LEAKS AND TEST THE VALVES FOR PROPER OPERATION. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 3557AS101-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 3557AS101-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4940-01-481-3737 is a Adapter,mechanical Test, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4940, Miscellaneous Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4940-01-481-3737 has 1 manufacturer part number on file: 3557AS101-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 3557AS101-1: Accessory Components and Quantity: QUICK COUPLER 1, P/NAHC21 (CAGE 55719);ADAPTERS 2, P/N AHC21M (CAGE 55719); AIR PRESSURE REGULATOR W/0-20 PSI GUAGE 1, P/NR162I (CAGE 0B8K7); 1/4 TURN AIR VALVE 1, P/NIM10C (CAGE 55719); TUBING TEST PLUGS 2, P/N2552K55 AND 2552K58 (CAGE 39428); CONTAINER 1; Functional Description: A TOOL TO PRESSURIZE THE FUEL VENT SYSTEM TO CHECK THE SYSTEM FOR LEAKS AND TEST THE VALVES FOR PROPER OPERATION.; Part Name Assigned by Controlling Agency: FUEL VENT TESTER,AIRCRAFT; End Item Identification: MV-22 AIRCRAFT. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4940-01-481-3737 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.