The Ring,retaining, cataloged under National Stock Number 5325-00-398-6959, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Circor Pumps North America Llc. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 25 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 25 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-398-6959 |
| Primary Part Number | SG1407PC37 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Material Diameter | 0.125 INCHES NOMINAL IN |
| Material Document and Classification | JAN-S-1160,GRADE 1,TYPE A MIL SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 3.938 INCHES NOMINAL IN |
| Inside Diameter | 3.688 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | WIRE |
| Material | STEEL |
| 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 |
|---|---|
| SG1407PC37 | Circor Pumps North America Llc (USA) |
| SG1430PC37 | Circor Pumps North America Llc (USA) |
| SG1669PC37 | Circor Pumps North America Llc (USA) |
| SG1444PC37 | Circor Pumps North America Llc (USA) |
| SG1174PC37 | Circor Pumps North America Llc (USA) |
| SG1369PC37 | Circor Pumps North America Llc (USA) |
| G4280PC37 | Circor Pumps North America Llc (USA) |
| SG1272PC37 | Circor Pumps North America Llc (USA) |
| SG1419PC37 | Circor Pumps North America Llc (USA) |
| G4286PC37 | Circor Pumps North America Llc (USA) |
| SG1165PC37 | Circor Pumps North America Llc (USA) |
| SG1356PC37 | Circor Pumps North America Llc (USA) |
| SG1282PC37 | Circor Pumps North America Llc (USA) |
| SG1410PC37 | Circor Pumps North America Llc (USA) |
| SG1126PC37 | Circor Pumps North America Llc (USA) |
| G4285PC37 | Circor Pumps North America Llc (USA) |
| SG1171PC37 | Circor Pumps North America Llc (USA) |
| SG1366PC37 | Circor Pumps North America Llc (USA) |
| SG1439PC37 | Circor Pumps North America Llc (USA) |
| SG1447PC37 | Circor Pumps North America Llc (USA) |
| Reference | Meaning |
|---|---|
| SG1440PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1296PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1403PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1288PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1370PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1174PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1272PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| G4335PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| G4283PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1391PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1411PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| G4340PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1421PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1348PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1032PC38 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1041PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1672PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1407PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| G4285PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG1377PC37 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 5325-00-398-6959 is a Ring,retaining, manufactured by Circor Pumps North America Llc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-398-6959 has 25 manufacturer part numbers on file: SG1407PC37 (Circor Pumps North America Llc), SG1430PC37 (Circor Pumps North America Llc), SG1669PC37 (Circor Pumps North America Llc), SG1444PC37 (Circor Pumps North America Llc), SG1174PC37 (Circor Pumps North America Llc) and 20 more.
1 possible match (shared part number, not a government interchangeability claim): 5961-00-581-9699. Verify interchangeability with system specifications before substitution.
Key specifications for SG1407PC37: Usage Design: INTERNAL; Material Diameter: 0.125 INCHES NOMINAL IN; Material Document and Classification: JAN-S-1160,GRADE 1,TYPE A MIL SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: ROUND. 9 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.