The Muffler,exhaust, cataloged under National Stock Number 2990-01-421-0578, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-421-0578 |
| Primary Part Number | SS-800-A674 |
| Item Name | Muffler,exhaust |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SS-800-A674 | Royston Limited (GBR) |
| SS-800-A674 PRIMARY | Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division (USA) |
| Reference | Meaning |
|---|---|
| GL 407 SHEET 3 ITEM 5 | C/1 Advisory reference — outside the item-of-supply concept Powerfield Limited T/a Rolls Royce Distributed Generation Systems |
| GL 407 SHEET 3/5 | C/1 Advisory reference — outside the item-of-supply concept Powerfield Limited T/a Rolls Royce Distributed Generation Systems |
| GL 407 SHEET 3 ITEM 5 | 5/9 Secondary reference Powerfield Specialist Engines |
| SS660-A674 | 5/9 Secondary reference Ingersoll-Rand Co Power Tool Div |
| GL 407 SHEET 3/5 | 5/9 Secondary reference Powerfield Specialist Engines |
| SS-800-A674 | 5/9 Secondary reference Ingersoll-Rand Co Power Tool Div |
NSN 2990-01-421-0578 is a Muffler,exhaust, manufactured by Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-421-0578 has 2 manufacturer part numbers on file: SS-800-A674 (Royston Limited), SS-800-A674 (Ingersoll-Rand Company Dba Ingersoll-Rand Div Tool & Hoist Division).
Key specifications for SS-800-A674: End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS.. 0 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.
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.