The Tube Assembly,metal, cataloged under National Stock Number 4710-00-941-3656, is classified within Federal Supply Class 4710 (Pipe, Tube and Rigid Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Kreisler Industrial Corporation. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4710-00-941-3656 |
| Primary Part Number | 512997 |
| Item Name | Tube Assembly,metal |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Kreisler Industrial Corporation |
| Status | ACTIVE |
| Seat Angle in Deg | 37.0 SINGLE END |
| Design Form | PREBENT |
| Mating End Quantity | 2 SINGLE END |
| Material Document and Classification | AMS 5646 ASSN STD SINGLE MATERIAL RESPONSE SINGLE END |
| Material Document and Classification | AMS 5570 ASSN STD SINGLE MATERIAL RESPONSE TUBING |
| Wall Thickness | 0.035 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND SINGLE END |
| Nominal Thread Size | 0.500 INCHES SINGLE END IN |
| End Connection Style | FLARE SINGLE END |
| Tube Outside Diameter | 0.312 INCHES NOMINAL IN |
| Thread Class | 3B SINGLE END |
| Material | STEEL COMP 347 SINGLE END |
| Material | STEEL COMP 321 TUBING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SINGLE END |
| Connection Special Design | UNION SINGLE END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4710-00-941-3656 is a Tube Assembly,metal, manufactured by Kreisler Industrial Corporation, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-00-941-3656 has 2 manufacturer part numbers on file: 512997 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 512997 (Kreisler Industrial Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-313-7277. Verify interchangeability with system specifications before substitution.
Key specifications for 512997: Seat Angle in Deg: 37.0 SINGLE END; Design Form: PREBENT; Mating End Quantity: 2 SINGLE END; Material Document and Classification: AMS 5646 ASSN STD SINGLE MATERIAL RESPONSE SINGLE END. 15 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.