The Flange,pipe, cataloged under National Stock Number 4730-01-138-6489, 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 Naval Sea Systems Command. Government technical data includes 17 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-138-6489 |
| Primary Part Number | 810-1385861TYG4IN |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Diameter | 8.687 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Maximum Operating Temp and Media for Which Designed | 150.0 FAHRENHEIT WATER, SALT DEGF |
| Tube Outside Diameter for Which Designed | 4.000 INCHES NOMINAL IN |
| Operating Pressure and Type | 700.0 POUNDS PER SQUARE INCH (PSI) SALT WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Flange Section Style | PLAIN FACE, WELDING NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.688 INCHES NOMINAL IN |
| Neck Height | 2.125 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OR QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE |
| Groove Depth | 0.108 INCHES MINIMUM AND 0.113 INCHES MAXIMUM IN |
| Groove Pitch Diameter | 3.312 INCHES NOMINAL IN |
| Bolt Hole Quantity | 10 |
| Bolt Circle Diameter | 7.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Groove Width | 0.188 INCHES NOMINAL IN |
| Thickness | 1.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 810-1385861TYG4IN PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 513-4775328ITEMF8 | 5/2 Secondary reference U.S. Government activity |
| 87765-1921 | D/9 Drawing number reference only U.S. Government activity |
| 13-08-0512 | 5/2 Secondary reference U.S. Government activity |
| 513-4775328 | D/9 Drawing number reference only U.S. Government activity |
| 508-4677429 ITE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 810-1385861 | D/9 Drawing number reference only Naval Sea Systems Command |
| 810-1385861TYG4IN | 5/2 Secondary reference U.S. Government activity |
| 704-477539ITEMF8 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-138-6489 is a Flange,pipe, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-138-6489 has 1 manufacturer part number on file: 810-1385861TYG4IN (Naval Sea Systems Command).
7 possible matches (shared part number, not a government interchangeability claim): 4730-01-139-4432, 4730-01-282-5124, 4730-01-303-2497. Verify interchangeability with system specifications before substitution.
Key specifications for 810-1385861TYG4IN: Flange Diameter: 8.687 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Maximum Operating Temp and Media for Which Designed: 150.0 FAHRENHEIT WATER, SALT DEGF; Tube Outside Diameter for Which Designed: 4.000 INCHES NOMINAL IN. 17 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 4730-01-138-6489 has DEMIL Code Q. 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.