The Stand,maintenance,a, cataloged under National Stock Number 4920-01-573-8557, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Tfab Ground Systems, Llc. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Stand,maintenance,a |
| FSC / FSG | 4920 — Aircraft Maintenance and Repair Shop Specialized Equipment (FSG 49) |
| Manufacturers | Tfab Ground Systems, Llc (CAGE 6GRT1); Lockheed Martin Corporation (CAGE 0L1E5); Greene Machine & Manufacturing Inc (CAGE 03ND7); Tyonek Machining and Fabrication, Llc (CAGE 7KQY0); C & T Industrial Machine Shop, Inc. (CAGE 4SAY8) |
| Parameter | Value |
|---|---|
| NSN | 4920-01-573-8557 |
| Primary Part Number | RG559-501 |
| Item Name | Stand,maintenance,a |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Tfab Ground Systems, Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| RG559-501 PRIMARY | Tfab Ground Systems, Llc (USA) |
| RG559-501 PRIMARY | Lockheed Martin Corporation (USA) |
| RG559-501 PRIMARY | Greene Machine & Manufacturing Inc (USA) |
| RG559-501 | Tyonek Machining and Fabrication, Llc (USA) |
| RG559-501 PRIMARY | C & T Industrial Machine Shop, Inc. (USA) |
| Reference | Meaning |
|---|---|
| RG559-501 | 5/9 Secondary reference Bryant's Machine Shop Inc |
| RG559-501 | 5/9 Secondary reference Stone Machine and Tool Inc |
NSN 4920-01-573-8557 is a Stand,maintenance,a, manufactured by Tfab Ground Systems, Llc, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-573-8557 has 5 manufacturer part numbers on file: RG559-501 (Tfab Ground Systems, Llc), RG559-501 (Lockheed Martin Corporation), RG559-501 (Greene Machine & Manufacturing Inc), RG559-501 (Tyonek Machining and Fabrication, Llc), RG559-501 (C & T Industrial Machine Shop, Inc.).
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 4920-01-573-8557 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.