The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-970-4291, 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 Danfoss Power Solutions II, Llc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-970-4291 |
| Primary Part Number | ER816-4-4 |
| Item Name | Adapter,straight,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Danfoss Power Solutions II, Llc |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.250 INCHES SECOND END IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE INSIDE |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Nominal Overall Length | 1.250 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Nominal Thread Size | 0.250 INCHES SECOND END IN |
| Seat Angle | 12.0 DEGREES FIRST END |
| Surface Treatment | CADMIUM INSIDE |
| Thread Class | 3A FIRST END A |
| Material | STEEL COMP 1137 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Thread Series Designator | ANPT 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 |
|---|---|
| ER816-4-4 PRIMARY | Danfoss Power Solutions II, Llc (USA) |
| ER816-4-4 PRIMARY | Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn (USA) |
| Reference | Meaning |
|---|---|
| ER816-4-4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| ER816-4-4 | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| ER816-4-4 | 5/9 Secondary reference U.S. Government activity |
| ER816-4-4 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
NSN 4730-00-970-4291 is a Adapter,straight,pipe to Tube, manufactured by Danfoss Power Solutions II, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-970-4291 has 2 manufacturer part numbers on file: ER816-4-4 (Danfoss Power Solutions II, Llc), ER816-4-4 (Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn).
Key specifications for ER816-4-4: Nominal Pipe Size Accommodated: 0.250 INCHES SECOND END IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE INSIDE; Connection Style: FLARELESS (TUBE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END. 18 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.