The Packing Nut, cataloged under National Stock Number 4730-01-531-3113, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-531-3113 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Style Designator | HEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER |
| Material | COPPER ALLOY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| PLC-13065 ITEM 7 | 5/2 Secondary reference U.S. Government activity |
| 041385AO | 3/2 Design control — primary reference U.S. Government activity |
| PLC-13065 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-531-3113 is a Packing Nut, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-531-3327. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-531-3113: Criticality Code Justification: FEAT; Style Designator: HEXAGON, EXTERNAL THREAD, INTERNAL SHOUL DER; Special Features: CRITICAL TECHNOLOGY; ALLOY C71500; EXTERNAL THREADS; APPLIES PRESSURE TO RETAINER TO SEAL INTERNAL STEM; Part Name Assigned by Controlling Agency: GLAND NUT. 3 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.