The Packing Nut, cataloged under National Stock Number 4730-01-121-7718, 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 Mayo Company Inc. Dba Dragon Equipment. Government technical data includes 14 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-121-7718 |
| Primary Part Number | 10-41540C |
| Item Name | Packing Nut |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mayo Company Inc. Dba Dragon Equipment |
| Status | ACTIVE |
| Length to Shoulder | 1.156 INCHES NOMINAL IN |
| Hole or Slot Quantity | 4 |
| Thread Length | 0.875 INCHES NOMINAL IN |
| Style Designator | ROUND, INTERNAL THREAD, SHOULDERED |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 6 5/8-12 |
| Screw Thread Series Designator | UN |
| Thread Class | 2B |
| Major Unthreaded Outside Diameter | 7.250 INCHES NOMINAL IN |
| Screw Thread Location | INTERNAL |
| Material | STEEL |
| Smallest Inside Diameter | 5.570 INCHES NOMINAL IN |
| Hole Diameter | 0.250 INCHES NOMINAL 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 |
|---|---|
| 10-41540C PRIMARY | Mayo Company Inc. Dba Dragon Equipment (USA) |
| Reference | Meaning |
|---|---|
| 10-41540C ITEM 13 | D/9 Drawing number reference only Komatsu America Corporation |
NSN 4730-01-121-7718 is a Packing Nut, manufactured by Mayo Company Inc. Dba Dragon Equipment, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-121-7718 has 1 manufacturer part number on file: 10-41540C (Mayo Company Inc. Dba Dragon Equipment).
Key specifications for 10-41540C: Length to Shoulder: 1.156 INCHES NOMINAL IN; Hole or Slot Quantity: 4; Thread Length: 0.875 INCHES NOMINAL IN; Style Designator: ROUND, INTERNAL THREAD, SHOULDERED. 14 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.