The Thread Piece,union, cataloged under National Stock Number 4730-01-138-2480, 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 Guill Tool & Engineering Co Inc Div Guill Defense. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-138-2480 |
| Primary Part Number | 2621-791-02ASSY41 |
| Item Name | Thread Piece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Guill Tool & Engineering Co Inc Div Guill Defense |
| Status | ACTIVE |
| Union End Thread Direction | RIGHT-HAND |
| Nominal Pipe Size Designation | 0.875 INCHES IN |
| End Connection Type | BRAZED |
| Union End Thread Size | 1-3/4-12 |
| Seat Type | STRAIGHT FACE |
| Union End Screw Thread Series Designator | UN |
| Material | STEEL COMP 304 |
| 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 |
|---|---|
| 2621-791-02ASSY41 | Guill Tool & Engineering Co Inc Div Guill Defense (USA) |
| Reference | Meaning |
|---|---|
| 2621-791-02ASSY41 | 3/2 Design control — primary reference U.S. Government activity |
| 262179102-42A | C/1 Advisory reference — outside the item-of-supply concept Guill Tool & Engineering Co Inc Div Guill Defense |
| 516-4682325 F30 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4730-01-138-2480 is a Thread Piece,union, manufactured by Guill Tool & Engineering Co Inc Div Guill Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-138-2480 has 1 manufacturer part number on file: 2621-791-02ASSY41 (Guill Tool & Engineering Co Inc Div Guill Defense).
Key specifications for 2621-791-02ASSY41: Union End Thread Direction: RIGHT-HAND; Nominal Pipe Size Designation: 0.875 INCHES IN; End Connection Type: BRAZED; Union End Thread Size: 1-3/4-12. 7 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.