The Wrap,muffler, cataloged under National Stock Number 2990-01-451-0598, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Advanced Thermal Products, Inc. Dba Advanced Thermal Products Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 2990-01-451-0598 |
| Primary Part Number | 88-20136 |
| Item Name | Wrap,muffler |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Advanced Thermal Products, Inc. Dba Advanced Thermal Products Inc |
| 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 |
|---|---|
| 88-20136 PRIMARY | Advanced Thermal Products, Inc. Dba Advanced Thermal Products Inc (USA) |
| Reference | Meaning |
|---|---|
| 88-20136 | 7/2 Vendor item drawing reference Department of Defense Project Manager-Mobile Electric Power |
NSN 2990-01-451-0598 is a Wrap,muffler, manufactured by Advanced Thermal Products, Inc. Dba Advanced Thermal Products Inc, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-451-0598 has 1 manufacturer part number on file: 88-20136 (Advanced Thermal Products, Inc. Dba Advanced Thermal Products Inc).
Key specifications for 88-20136: Overall Length: 20.250 INCHES NOMINAL IN; Overall Width: 20.500 INCHES NOMINAL IN; Special Features: MATERIAL: COVER-SILICONE IMPREGNATED FIBERGLASS FABRIC; INSULATION: CHOPPED GLASS FIBERS; CAPSTAND AND WIRE LACING: STAINLESS STEEL. 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.