The Tee,pipe to Tube, cataloged under National Stock Number 4730-01-102-8552, 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 Lockheed Martin Corporation Div Rms. Government technical data includes 28 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-102-8552 |
| Primary Part Number | 77C714990P001 |
| Item Name | Tee,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 TUBE COUPLING NUT W/SLEEVE |
| Connection Style | PLAIN (PIPE) THIRD END |
| Connection Style | FLARELESS (TUBE) SECOND END |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Connection Type | THREADED EXTERNAL PIPE THIRD END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Material Document and Classification | CELCON ACETAL COPOLYMER MFR REF SINGLE MATERIAL RESPONSE SLEEVE |
| Material Document and Classification | QQ-B-626,COMP 21 FED SPEC 1ST MATERIAL RESPONSE TEE |
| Material Document and Classification | QQ-B-626,COMP 22,1/2 H FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Leg Length | 0.750 INCHES NOMINAL THIRD END IN |
| Leg Length | 0.840 INCHES MINIMUM AND 1.272 INCHES MAXIMUM FIRST END IN |
| Leg Length | 0.840 INCHES MINIMUM AND 1.272 INCHES MAXIMUM SECOND END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Nominal Thread Size | 0.125 INCHES THIRD END IN |
| Seat Angle | 12.0 DEGREES SECOND END |
| Seat Angle | 12.0 DEGREES FIRST END |
| Thread Class | 2A SECOND END A |
| Thread Class | 2A FIRST END A |
| Material | COPPER ALLOY 360 NUT |
| Material | COPPER ALLOY 377 OR COPPER ALLOY TEE |
| Material | PLASTIC ACETAL SLEEVE |
| Thread Series Designator | NPT THIRD END |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF 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 |
|---|---|
| 77C714990P001 | Lockheed Martin Corporation Div Rms (USA) |
| WSS94594 | Carrier Corp (USA) |
| Reference | Meaning |
|---|---|
| 272P1-4X1-8 | 5/9 Secondary reference Parker Hannifin Corp Hose Products Div |
| 272-P 1/4X1/8 | 5/9 Secondary reference Imperial |
| 3147332 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| C16853 | D/9 Drawing number reference only Spx Corporation Dba Dielectric Communications Div Spx Communication Technologies |
| C16853-45 | 5/9 Secondary reference Spx Corporation Dba Dielectric Communications Div Spx Communication Technologies |
| 172P-4-2 | 3/2 Design control — primary reference U.S. Government activity |
| 1272X4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| 272P1/4-1/8 | 5/9 Secondary reference Imperial |
NSN 4730-01-102-8552 is a Tee,pipe to Tube, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-102-8552 has 2 manufacturer part numbers on file: 77C714990P001 (Lockheed Martin Corporation Div Rms), WSS94594 (Carrier Corp).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-230-3608. Verify interchangeability with system specifications before substitution.
Key specifications for 77C714990P001: Furnished Items and Quantity: 2 TUBE COUPLING NUT W/SLEEVE; Connection Style: PLAIN (PIPE) THIRD END; Connection Style: FLARELESS (TUBE) SECOND END; Connection Style: FLARELESS (TUBE) FIRST END. 28 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.