The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-00-541-1750, 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 Sae International Dba Sae International. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 27 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-541-1750 |
| Primary Part Number | SAE AS21924 |
| Item Name | Adapter,straight,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Nominal Overall Length | 1.656 INCHES IN |
| Criticality Code Justification | FEAT |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Thread Size | 0.438 INCHES CENTER BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 12.0 DEGREES FIRST END |
| Specification/standard Data | 96906-MS21925 GOVERNMENT STANDARD |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A CENTER BULKHEAD A |
| Thread Class | 3A ALL ENDS A |
| Material | STEEL COMP 1137 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) CENTER BULKHEAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| MS21924-4 | Leonardo Spa Helicopters Division - Production Site (ITA) |
| SAE AS21924 PRIMARY | Sae International Dba Sae International (USA) |
| MS21924-4 | Satair A/s (DNK) |
| Reference | Meaning |
|---|---|
| DLG315F0404 | C/1 Advisory reference — outside the item-of-supply concept Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| VSF1280F0404 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| GA7444F0404 | C/1 Advisory reference — outside the item-of-supply concept Preece Inc Decca Valves Div |
| MS21924-4 | 5/9 Secondary reference U.S. Government activity |
| MS21924-4 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| MS21925-4 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| MS21903-4 | 5/9 Secondary reference U.S. Government activity |
| 4730005411750 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| ER315-0404 | C/1 Advisory reference — outside the item-of-supply concept Dana Corp Weatherhead Div |
| MS21925-4 | 5/9 Secondary reference Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn |
| MS21924-4 | 5/9 Secondary reference U.S. Government activity |
| MS21924-4 | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| 2-01096F0404 | C/1 Advisory reference — outside the item-of-supply concept Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| ER315-0404 | C/1 Advisory reference — outside the item-of-supply concept Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| SAE AS21924 | 5/9 Secondary reference U.S. Government activity |
| MS21924-4 | 5/9 Secondary reference Globe Aerospace Inc |
| 2-01096T0404 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| PMS21924-001-04 | 5/1 Secondary reference Us Army Aviation and Missile Command |
| MS21924-4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| AS21924 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-541-1750 is a Adapter,straight,tube to Boss, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: cancelled.
NSN 4730-00-541-1750 has 3 manufacturer part numbers on file: MS21924-4 (Leonardo Spa Helicopters Division - Production Site), SAE AS21924 (Sae International Dba Sae International), MS21924-4 (Satair A/s).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-073-3771, 4730-01-436-0108. Verify interchangeability with system specifications before substitution.
Key specifications for SAE AS21924: Surface Treatment Document and Classification: QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: FLARELESS (TUBE) FIRST END; Nominal Overall Length: 1.656 INCHES IN. 19 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.
NSN 4730-00-541-1750 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.