The Tube Assembly,metal, cataloged under National Stock Number 4710-01-012-0574, 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 Williams International Co., L.l.c.. Government technical data includes 14 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. 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 | 4710-01-012-0574 |
| Primary Part Number | 25557 |
| Item Name | Tube Assembly,metal |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Williams International Co., L.l.c. |
| Status | ACTIVE |
| Seat Angle in Deg | 37.0 SINGLE END |
| Design Form | PREBENT |
| Mating End Quantity | 2 SINGLE END |
| Material Document and Classification | AISI 304 ASSN STD SINGLE MATERIAL RESPONSE TUBING |
| Wall Thickness | 0.017 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND SINGLE END |
| Nominal Thread Size | 0.500 INCHES SINGLE END IN |
| End Connection Style | SWIVEL NUT, FLARED SINGLE END |
| Tube Outside Diameter | 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN |
| Thread Class | 2B SINGLE END |
| Material | STEEL CORROSION RESISTING SINGLE END |
| Material | STEEL COMP 304 TUBING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SINGLE END |
| End Connection Spec/std | MIL,MS20819,PART NO. MS20819-5J,ANA,AN818,PART NO. AN818-5J |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 25557 PRIMARY | Williams International Co., L.l.c. (USA) |
NSN 4710-01-012-0574 is a Tube Assembly,metal, manufactured by Williams International Co., L.l.c., classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-012-0574 has 1 manufacturer part number on file: 25557 (Williams International Co., L.l.c.).
1 possible match (shared part number, not a government interchangeability claim): 4940-01-117-9095. Verify interchangeability with system specifications before substitution.
Key specifications for 25557: Seat Angle in Deg: 37.0 SINGLE END; Design Form: PREBENT; Mating End Quantity: 2 SINGLE END; Material Document and Classification: AISI 304 ASSN STD SINGLE MATERIAL RESPONSE TUBING. 14 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 4710-01-012-0574 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.