PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25421Tube Assembly,metal

Williams International Co., L.l.c. · NSN 4710-01-012-2275 · FSC 4710 · No Item Name Available
Verified by PartsTable
NSN 4710-01-012-2275 — this item is cataloged by the U.S. Government under National Stock Number 4710-01-012-2275. Primary manufacturer part number: 25421.
Features
  • Tube Assembly,metal — FSC 4710
  • End Connection Spec/std: MIL,MS20819,PART NO. MS20819-4K AND AN,AN818,PART NO. AN818-4K
  • Seat Angle in Deg: 37.0 SINGLE END
  • Material Document and Classification: TYPE 316 ASSN STD SINGLE MATERIAL RESPONSE SINGLE END
  • Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF) SINGLE END
  • Material Document and Classification: AISI 304 ASSN STD SINGLE MATERIAL RESPONSE OR AISI 321 ASSN STD SINGLE MATERIAL RESPONSE OR AISI 347 ASSN STD SINGLE MATERIAL RESPONSE TUBING
  • Material: STEEL COMP 304 OR STEEL COMP 321 OR STEEL COMP 347 TUBING
  • Nominal Thread Size: 0.438 INCHES SINGLE END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Comp 304 or Steel Comp 321 or Steel Comp 347 Tubing construction
General Description

The Tube Assembly,metal, cataloged under National Stock Number 4710-01-012-2275, is classified within Federal Supply Class 4710 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Williams International Co., L.l.c.. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4710-01-012-2275
Primary Part Number25421
Item NameTube Assembly,metal
FSC / FSG4710 / 47 — No Item Name Available
ManufacturerWilliams International Co., L.l.c.
StatusACTIVE
End Connection Spec/stdMIL,MS20819,PART NO. MS20819-4K AND AN,AN818,PART NO. AN818-4K
Seat Angle in Deg37.0 SINGLE END
Material Document and ClassificationTYPE 316 ASSN STD SINGLE MATERIAL RESPONSE SINGLE END
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF) SINGLE END
Material Document and ClassificationAISI 304 ASSN STD SINGLE MATERIAL RESPONSE OR AISI 321 ASSN STD SINGLE MATERIAL RESPONSE OR AISI 347 ASSN STD SINGLE MATERIAL RESPONSE TUBING
MaterialSTEEL COMP 304 OR STEEL COMP 321 OR STEEL COMP 347 TUBING
Nominal Thread Size0.438 INCHES SINGLE END IN
End Connection StyleSWIVEL NUT, FLARED SINGLE END
Thread Class3B SINGLE END
MaterialSTEEL COMP 316 SINGLE END
Design FormPREBENT
Tube Outside Diameter0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
Wall Thickness0.019 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND SINGLE END
Connection Special DesignUNION SINGLE END
Mating End Quantity2 SINGLE END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
3110-00-100-8575E41 INTERCHANGEABLE
Bearing,ball,thrust
Abc Acquisition Company Dba Aetna Bearing Company
5342-00-209-7464 INTERCHANGEABLE
Panel Assembly
2805-00-382-8000 INTERCHANGEABLE
Insert,engine Valve Seat
6160-00-956-334425421-002 INTERCHANGEABLE
Cover,battery Box
Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company
2590-01-265-324325421 INTERCHANGEABLE
Parts Kit,linear Actuating Cylin
Mark Industries
5306-01-315-9740 INTERCHANGEABLE
Rod,threaded End
6210-01-467-762025421 INTERCHANGEABLE
Lens,light
Electronic Marine Systems, Inc.
4140-01-539-4354 INTERCHANGEABLE
Fan,tubeaxial
5925-01-566-070825421 INTERCHANGEABLE
Circuit Breaker
Schneider Electric Usa, Inc.
Cross-Reference Index
Part NumberManufacturer
25421 PRIMARY Williams International Co., L.l.c. (USA)
Related Parts
3110-00-100-8575INTERCHANGEABLE
BEARING,BALL,THRUST
E41
5342-00-209-7464INTERCHANGEABLE
PANEL ASSEMBLY
2805-00-382-8000INTERCHANGEABLE
INSERT,ENGINE VALVE SEAT
6160-00-956-3344INTERCHANGEABLE
COVER,BATTERY BOX
25421-002
2590-01-265-3243INTERCHANGEABLE
PARTS KIT,LINEAR ACTUATING CYLIN
25421
5306-01-315-9740INTERCHANGEABLE
ROD,THREADED END
6210-01-467-7620INTERCHANGEABLE
LENS,LIGHT
25421
4140-01-539-4354INTERCHANGEABLE
FAN,TUBEAXIAL
5925-01-566-0708INTERCHANGEABLE
CIRCUIT BREAKER
25421

Frequently Asked Questions

What is NSN 4710-01-012-2275?

NSN 4710-01-012-2275 is a Tube Assembly,metal, manufactured by Williams International Co., L.l.c., classified under FSC 4710 (No Item Name Available). Status: active.

What are the part numbers for NSN 4710-01-012-2275?

NSN 4710-01-012-2275 has 1 cross-referenced part number: 25421 (Williams International Co., L.l.c.).

What NSN replaces 4710-01-012-2275?

There are 9 known substitutes for 4710-01-012-2275: 3110-00-100-8575, 5342-00-209-7464, 2805-00-382-8000 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25421?

Key specifications for 25421: End Connection Spec/std: MIL,MS20819,PART NO. MS20819-4K AND AN,AN818,PART NO. AN818-4K; Seat Angle in Deg: 37.0 SINGLE END; Material Document and Classification: TYPE 316 ASSN STD SINGLE MATERIAL RESPONSE SINGLE END; Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF) SINGLE END. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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