The Flange,pipe, cataloged under National Stock Number 4730-01-388-4871, 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 Instrument Technology, Inc.. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-388-4871 |
| Primary Part Number | 845-6717291 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Instrument Technology, Inc. |
| Status | ACTIVE |
| Face Seating Surface Condition | MACHINED |
| Surface Treatment Document and Classification | QQ-P-35,TYPE VI FED SPEC SINGLE TREATMENT RESPONSE |
| Flange Section Style | PLAIN FACE |
| Style Designator | BOLT HOLE CONNECTOR PLATE |
| Bolt Hole Diameter | 0.176 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-763,CL 316,COND A FED SPEC SINGLE MATERIAL RESPONSE |
| Flange Length | 1.625 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Length | 0.794 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE |
| Flange Width | 0.812 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.397 INCHES NOMINAL IN |
| Thickness | 0.245 INCHES MINIMUM AND 0.249 INCHES MAXIMUM 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 |
|---|---|
| 845-6717291 PRIMARY | Instrument Technology, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 845-6717291 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-388-4871 is a Flange,pipe, manufactured by Instrument Technology, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-388-4871 has 1 manufacturer part number on file: 845-6717291 (Instrument Technology, Inc.).
Key specifications for 845-6717291: Face Seating Surface Condition: MACHINED; Surface Treatment Document and Classification: QQ-P-35,TYPE VI FED SPEC SINGLE TREATMENT RESPONSE; Flange Section Style: PLAIN FACE; Style Designator: BOLT HOLE CONNECTOR PLATE. 13 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.