The Nipple,tube, cataloged under National Stock Number 4730-00-756-1047, 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 Triumph Thermal Systems - Maryland, Inc.. Government technical data includes 19 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-756-1047 |
| Primary Part Number | 26987 |
| Item Name | Nipple,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Triumph Thermal Systems - Maryland, Inc. |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Nominal Overall Length | 2.109 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | FLARED W/ CENTER WRENCHING FACILITY |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES ALL ENDS IN |
| Leg Length | 0.864 INCHES NOMINAL ALL ENDS IN |
| Nominal Thread Size | 1.062 INCHES ALL ENDS IN |
| Seat Angle | 37.000 DEGREES ALL ENDS |
| Departure From Cited Designator | AS MODIFIED BY SPECIAL FEATURES |
| Specification/standard Data | 81349-MIL-F-5509 GOVERNMENT SPECIFICATION |
| Surface Treatment | ANODIZE INSIDE |
| Surface Treatment | ANODIZE OUTSIDE |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Thread Series Designator | UN ALL ENDS |
| 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 |
|---|---|
| 26987 PRIMARY | Triumph Thermal Systems - Maryland, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 745533A | 5/9 Secondary reference Air-a-Plane Corp |
| D84S9-175-4 | 3/2 Design control — primary reference U.S. Government activity |
| MIL-F-5509 | 4/1 Identification reference U.S. Government activity |
NSN 4730-00-756-1047 is a Nipple,tube, manufactured by Triumph Thermal Systems - Maryland, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-756-1047 has 1 manufacturer part number on file: 26987 (Triumph Thermal Systems - Maryland, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5985-01-051-0701. Verify interchangeability with system specifications before substitution.
Key specifications for 26987: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE; Connection Style: FLARED (TUBE) ALL ENDS; Nominal Overall Length: 2.109 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.
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.