The Adapter,straight,flange to Pipe, cataloged under National Stock Number 4730-01-261-6587, 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 Mks Instruments Inc Hps Div. Government technical data includes 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-261-6587 |
| Primary Part Number | 31-6801 |
| Item Name | Adapter,straight,flange to Pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mks Instruments Inc Hps Div |
| Status | ACTIVE |
| Flange Shape | ROUND SECOND END |
| Flange Face Design | PLAIN WITH GASKET GROOVE SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Nominal Overall Length | 1.570 INCHES IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Nominal Outside Diameter | 16.0 MILLIMETERS SECOND END MM |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| 31-6801 PRIMARY | Mks Instruments Inc Hps Div (USA) |
NSN 4730-01-261-6587 is a Adapter,straight,flange to Pipe, manufactured by Mks Instruments Inc Hps Div, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-261-6587 has 1 manufacturer part number on file: 31-6801 (Mks Instruments Inc Hps Div).
Key specifications for 31-6801: Flange Shape: ROUND SECOND END; Flange Face Design: PLAIN WITH GASKET GROOVE SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Nominal Overall Length: 1.570 INCHES IN. 10 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.