The Clamp,packing Retaining, cataloged under National Stock Number 4320-00-398-6583, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Fmc Corp. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-398-6583 |
| Primary Part Number | S4482PC56 |
| Item Name | Clamp,packing Retaining |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Fmc Corp |
| Status | ACTIVE |
| General Characteristics Item Description | BRASS; 1.733 IN. O/A LG; 0.425 IN. HOLE DIA; 0.135 IN. THK; 1.891 IN. O/A W IN |
| 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 |
|---|---|
| S4482PC56 | Fmc Corp (USA) |
| S5725PC31 | Fmc Corp (USA) |
| Reference | Meaning |
|---|---|
| P1155 | C/1 Advisory reference — outside the item-of-supply concept Clow Corp Pump Div |
| P-1155 | 5/2 Secondary reference U.S. Government activity |
| S4482PC56 | 3/9 Design control — primary reference Clow Corp Pump Div |
| S5725PC31 | 5/9 Secondary reference Clow Corp Pump Div |
NSN 4320-00-398-6583 is a Clamp,packing Retaining, manufactured by Fmc Corp, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-398-6583 has 2 manufacturer part numbers on file: S4482PC56 (Fmc Corp), S5725PC31 (Fmc Corp).
3 possible matches (shared part number, not a government interchangeability claim): 3120-00-909-6148, 5360-01-183-9174, 5915-01-676-6640. Verify interchangeability with system specifications before substitution.
Key specifications for S4482PC56: General Characteristics Item Description: BRASS; 1.733 IN. O/A LG; 0.425 IN. HOLE DIA; 0.135 IN. THK; 1.891 IN. O/A W IN. 1 specification is 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.