The Flange,pipe, cataloged under National Stock Number 4730-01-148-8264, 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 Oil States Industries, Inc. Div Special Products Div. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-148-8264 |
| Primary Part Number | 299989-101 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Oil States Industries, Inc. Div Special Products Div |
| Status | ACTIVE |
| Socket Diameter | 3.687 INCHES NOMINAL IN |
| Flange Diameter | 7.375 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Socket Depth | 1.808 INCHES NOMINAL IN |
| Tube Outside Diameter for Which Designed | 3.750 INCHES NOMINAL IN |
| Flange Section Style | PLAIN FACE, SOCKET NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.685 INCHES NOMINAL IN |
| Neck Height | 0.728 INCHES NOMINAL IN |
| Groove Depth | 0.116 INCHES NOMINAL IN |
| Nominal Thread Size | 3.750 INCHES IN |
| Groove Pitch Diameter | 3.752 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 |
| Bolt Circle Diameter | 5.937 INCHES NOMINAL IN |
| Screw Thread Series Designator | UN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY |
| Groove Width | 0.190 INCHES NOMINAL IN |
| Thickness | 1.355 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 |
|---|---|
| 299989-101 PRIMARY | Oil States Industries, Inc. Div Special Products Div (USA) |
| Reference | Meaning |
|---|---|
| 299937 | D/9 Drawing number reference only Edwards Aerospace Inc |
| 299989 | D/9 Drawing number reference only Edwards Aerospace Inc |
NSN 4730-01-148-8264 is a Flange,pipe, manufactured by Oil States Industries, Inc. Div Special Products Div, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-148-8264 has 1 manufacturer part number on file: 299989-101 (Oil States Industries, Inc. Div Special Products Div).
Key specifications for 299989-101: Socket Diameter: 3.687 INCHES NOMINAL IN; Flange Diameter: 7.375 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Socket Depth: 1.808 INCHES NOMINAL IN. 20 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.