The Idler,piston Housing, cataloged under National Stock Number 4320-00-074-4538, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Circor Pumps North America Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-074-4538 |
| Primary Part Number | S411A |
| Item Name | Idler,piston Housing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| General Characteristics Item Description | FURNISHED WITH SPRING PIN |
| 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 |
|---|---|
| S411A PRIMARY | Circor Pumps North America Llc (USA) |
| Reference | Meaning |
|---|---|
| S411AD0000 | 5/9 Secondary reference Circor Pumps North America Llc |
| S411AD0000 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG-4569 PART NO.S-411AD | D/9 Drawing number reference only Circor Pumps North America Llc |
| SG-4569PT.NO.S-411AD | 5/9 Secondary reference Siemens Energy, Inc. |
| SG-4569 PART N0. S-411AD | 5/9 Secondary reference Siemens Energy, Inc. |
| SG-4569PT.NO.S-411AD | D/9 Drawing number reference only Circor Pumps North America Llc |
NSN 4320-00-074-4538 is a Idler,piston Housing, manufactured by Circor Pumps North America Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-074-4538 has 1 manufacturer part number on file: S411A (Circor Pumps North America Llc).
Key specifications for S411A: General Characteristics Item Description: FURNISHED WITH SPRING PIN; End Item Identification: DELAVAL IMO PUMP TYPEA12DBX-118. 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.