The Adapter,straight,pipe to Boss, cataloged under National Stock Number 4730-01-526-6538, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-526-6538 |
| Primary Part Number | 6391064-1 |
| Item Name | Adapter,straight,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) SECOND END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS SWIVEL) FIRST END |
| Nominal Overall Length | 2.250 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS FIRST END |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Nominal Thread Size | 0.125 INCHES SECOND END IN |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Pipe Wall Thickness Designation for Which Designed | STANDARD SECOND END |
| Thread Class | 1A FIRST END A |
| Material | PLASTIC BODY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST END |
| Thread Series Designator | NPT SECOND 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 |
|---|---|
| 6391064-1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7326574 FIND 001 | 5/1 Secondary reference Naval Sea Systems Command |
| 6391064 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-526-6538 is a Adapter,straight,pipe to Boss, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-526-6538 has 1 manufacturer part number on file: 6391064-1 (Naval Sea Systems Command).
Key specifications for 6391064-1: Connection Style: PLAIN (PIPE) SECOND END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS SWIVEL) FIRST END; Nominal Overall Length: 2.250 INCHES IN; Connection Type: THREADED EXTERNAL BOSS FIRST END. 12 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.