The Repair Kit,piston, cataloged under National Stock Number 3655-01-157-3889, is classified within Federal Supply Class 3655 (Gas Generating and Dispensing Systems, Fixed or Mobile) of the Special Industry Machinery group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3655-01-157-3889 |
| Item Name | Repair Kit,piston |
| FSC / FSG | 3655 / 36 — Gas Generating and Dispensing Systems, Fixed or Mobile |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF 1 EACH-PACKING,SCREEN,SEAT RING,GASKET SEAL PLATE,SEAL PLATE AND JET TUBE,RELIEF SEAT ASSY,DIAGPHRAM CONTROL,PISTON DIAGPHRAM,SPACER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| A040901052 | 5/9 Secondary reference Zwick Energy Researach Organization Inc |
| A040901052 | 3/9 Design control — primary reference Prime Source |
| 8222420 | 5/9 Secondary reference U.S. Government activity |
NSN 3655-01-157-3889 is a Repair Kit,piston, classified under FSC 3655, Gas Generating and Dispensing Systems, Fixed or Mobile. Status: active.
Key specifications for 3655-01-157-3889: General Characteristics Item Description: CONSISTS OF 1 EACH-PACKING,SCREEN,SEAT RING,GASKET SEAL PLATE,SEAL PLATE AND JET TUBE,RELIEF SEAT ASSY,DIAGPHRAM CONTROL,PISTON DIAGPHRAM,SPACER; End Item Identification: 3655010899563,NITROGEN SERVICING UNIT. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 3655-01-157-3889 has DEMIL Code Q. 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.