The Packing Nut, cataloged under National Stock Number 4730-00-725-4502, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 16 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-725-4502 |
| Primary Part Number | 4YZ913-70R7PC35 |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Hole or Slot Quantity | 4 |
| Largest Inside Diameter | 0.196 INCHES NOMINAL IN |
| Thread Length | 0.063 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| Style Designator | ROUND, INTERNAL THREAD, SHOULDERED |
| Smallest Outside Diameter | 0.233 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 3/16IN-32 IN |
| Screw Thread Series Designator | UNF |
| Thread Class | 2A A |
| Major Unthreaded Outside Diameter | 0.344 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | STEEL COMP 304 |
| Slot Width | 0.063 INCHES NOMINAL IN |
| Reference Number Differentiating Characteristics | CLEANED IN ACCORDANCE WITH MIL-C-19874(SHIPS) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 4YZ913-70R7PC35 | Ashcroft Inc Dba Heise (USA) |
| 5ZS72PC35 | Ashcroft Inc Dba Heise (USA) |
| Reference | Meaning |
|---|---|
| 4YZ913-70REV5PC35 | 5/1 Secondary reference Ashcroft Inc Dba Heise |
| ZQ117 | 3/1 Design control — primary reference Ashcroft Inc Dba Heise |
| ZQ117REV2PCALL | 5/1 Secondary reference Ashcroft Inc Dba Heise |
NSN 4730-00-725-4502 is a Packing Nut, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-725-4502 has 2 manufacturer part numbers on file: 4YZ913-70R7PC35 (Ashcroft Inc Dba Heise), 5ZS72PC35 (Ashcroft Inc Dba Heise).
Key specifications for 4YZ913-70R7PC35: Hole or Slot Quantity: 4; Largest Inside Diameter: 0.196 INCHES NOMINAL IN; Thread Length: 0.063 INCHES NOMINAL IN; Criticality Code Justification: ZZZY. 16 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.
NSN 4730-00-725-4502 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.