The Housing,piston, cataloged under National Stock Number 2990-01-218-0115, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-218-0115 |
| Item Name | Housing,piston |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Status | ACTIVE |
| FSC Application Data | MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT |
| Relationship to Similar Equipment | SIMILAR TO PN 3606058 |
| General Characteristics Item Description | MATL CRES 17-4PH AMS5643; HEA TREAT TO H1025 PER HT5089; 2.657 IN. LG; 4.415 IN. OD; 1.020 IN. ID; 0.036 IN. DIA THRU 2 HOLES 180.0 APART 3 PLACES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 3886107-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2990-01-218-0115 is a Housing,piston, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
Key specifications for 2990-01-218-0115: FSC Application Data: MISCELLANEOUS ENGINE ACCESSORIES,NONAIRCRAFT; Relationship to Similar Equipment: SIMILAR TO PN 3606058; General Characteristics Item Description: MATL CRES 17-4PH AMS5643; HEA TREAT TO H1025 PER HT5089; 2.657 IN. LG; 4.415 IN. OD; 1.020 IN. ID; 0.036 IN. DIA THRU 2 HOLES 180.0 APART 3 PLACES IN; End Item Identification: U/O APU FOR F101 ENGINE; E/I B1-B ACFT. 3 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.