The Trim and Drain Assy, cataloged under National Stock Number 4320-01-551-7429, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-551-7429 |
| Primary Part Number | 904-64099055-FIND NO-A1 |
| Item Name | Trim and Drain Assy |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | TRIDENT PLANNED EQUIPMENT REPLACEMENT (TRIPER) AND ADVANCED EQUIPMENT REPAIR PROGRAM (AERP) PROCEDURES IAW NAVSUP WSS INST 4420.170 OPERATING PROCEDURE 3. INCLUDES BOTH L1/SS/Q3/Q5/SOC AND NON-L1/SS/Q3/Q5/SOC TRIPER/AERP COMPONENTS. TRIPER/AERP EQUIPMENT HAVE SPECIAL REQUIREMENTS BUT NO SPECIFIC MATERIAL CONTROL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 904-64099055-FIND NO-A1 | Naval Sea Systems Command (USA) |
| CONTAINS 014082651 AND 014068339 | Naval Inventory Control Point Mechanicsburg (USA) |
| 15-2815 | Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash (USA) |
| 15-4035A3 | Naval Inventory Control Point Mechanicsburg (USA) |
| DF2285-1475-SHEET 6 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 15-4035 | 3/1 Design control — primary reference Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash |
| 211027411 | 5/2 Secondary reference U.S. Government activity |
NSN 4320-01-551-7429 is a Trim and Drain Assy, manufactured by Naval Sea Systems Command, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-551-7429 has 5 manufacturer part numbers on file: 904-64099055-FIND NO-A1 (Naval Sea Systems Command), CONTAINS 014082651 AND 014068339 (Naval Inventory Control Point Mechanicsburg), 15-2815 (Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash), 15-4035A3 (Naval Inventory Control Point Mechanicsburg), DF2285-1475-SHEET 6 (Huntington Ingalls Inc Div Newport News Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 2090-01-643-4106. Verify interchangeability with system specifications before substitution.
Key specifications for 904-64099055-FIND NO-A1: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: (INAVY)TRIM AND DRAIN ASSEMBLY; End Item Identification: TRIM AND DRAIN PRIMING PUMP / MOTOR; Reference Number Differentiating Characteristics: TRIDENT PLANNED EQUIPMENT REPLACEMENT (TRIPER) AND ADVANCED EQUIPMENT REPAIR PROGRAM (AERP) PROCEDURES IAW NAVSUP WSS INST 4420.170 OPERATING PROCEDURE 3. INCLUDES BOTH L1/SS/Q3/Q5/SOC AND NON-L1/SS/Q3/Q5/SOC TRIPER/AERP COMPONENTS. TRIPER/AERP EQUIPMENT HAVE SPECIAL REQUIREMENTS BUT NO SPECIFIC MATERIAL CONTROL. 2 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.