The Expansion Joint,pipe, cataloged under National Stock Number 4730-00-151-6838, 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 American Boa Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-151-6838 |
| Primary Part Number | FS2085-3IN321CRE |
| Item Name | Expansion Joint,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | American Boa Inc |
| Status | ACTIVE |
| Nominal Pipe Size Designation | 3.000 INCHES IN |
| Design Type | DIAPHRAGM |
| Traverse Maximum Length | 0.160 INCHES IN |
| Bolt Hole Diameter | 0.750 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 6.000 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE FLANGE |
| Material | STEEL COMP 321 FLANGE |
| Joint Type | DOUBLE |
| 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 |
|---|---|
| FS2085-3IN321CRE | American Boa Inc (USA) |
| Reference | Meaning |
|---|---|
| 3ES44 | 5/9 Secondary reference Arco Metals Co Div of Atlantic Richfield Co |
| 11290856-1 | 3/9 Design control — primary reference Ballistic Missile Defense Systems Command |
NSN 4730-00-151-6838 is a Expansion Joint,pipe, manufactured by American Boa Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-151-6838 has 1 manufacturer part number on file: FS2085-3IN321CRE (American Boa Inc).
Key specifications for FS2085-3IN321CRE: Nominal Pipe Size Designation: 3.000 INCHES IN; Design Type: DIAPHRAGM; Traverse Maximum Length: 0.160 INCHES IN; Bolt Hole Diameter: 0.750 INCHES NOMINAL IN. 9 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.