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Technical Data Sheet
PartsTable / COMPONENT / 11639723
11639723 ✓ Verified by PartsTable
— · PIPE SECTION
WHAT YOU NEED TO KNOW
Schedule = wall thickness, NOT diameter Nominal pipe size != actual OD
Sch 40 and Sch 80 same OD, different wall
PRODUCT OVERVIEW

The TUBE,METALLIC is a the manufacturer industrial component. Key specifications include diameter: 0.312 INCHES NOMINAL IN, construction: STRAIGHT SEAMED, wall_thickness: 0.035 INCHES NOMINAL IN, welding_method: DOUBLE SUBMERGED ARC, first_end_style: PLAIN, cross-sectional_shape_style: PLAIN ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-640-5415, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
11639723
NSN: 4710-00-640-5415
FSC: 4710
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
diameter0.312 INCHES NOMINAL IN
constructionSTRAIGHT SEAMED
wall_thickness0.035 INCHES NOMINAL IN
welding_methodDOUBLE SUBMERGED ARC
first_end_stylePLAIN
cross-sectional_shape_stylePLAIN ROUND
nondefinitive_spec/std_data3&&JCL8 TYPE
specification/standard_data81348-ASTM-A254 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
second_end_relationship_with_first_endIDENTICAL
NSN4710-00-640-5415
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 11639723 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST END STYLE: PLAIN
•
NONDEFINITIVE SPEC/STD DATA: 3&&JCL8 TYPE
•
WALL THICKNESS: 0.035 INCHES NOMINAL IN
•
WELDING METHOD: DOUBLE SUBMERGED ARC
•
DIAMETER: 0.312 INCHES NOMINAL IN
•
SPECIFICATION/STANDARD DATA: 81348-ASTM-A254 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
CONSTRUCTION: STRAIGHT SEAMED
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END STYLEPLAIN
NONDEFINITIVE SPEC/STD DATA3&&JCL8 TYPE
WALL THICKNESS0.035 INCHES NOMINAL IN
WELDING METHODDOUBLE SUBMERGED ARC
DIAMETER0.312 INCHES NOMINAL IN
SPECIFICATION/STANDARD DATA81348-ASTM-A254 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
CONSTRUCTIONSTRAIGHT SEAMED
CROSS-SECTIONAL SHAPE STYLEPLAIN ROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
MILT3520Interchangeable
interchangeable cross-reference
interchangeable
ASTM A254Interchangeable
interchangeable cross-reference
interchangeable
44T531973Interchangeable
interchangeable cross-reference
interchangeable
M3520-B80E05GInterchangeable
interchangeable cross-reference
interchangeable
M3520-B70G08GInterchangeable
interchangeable cross-reference
interchangeable
44-8310-500-010Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11639723?
11639723 is a TUBE,METALLIC.
What parts can replace 11639723?
There are 14 known substitutes for 11639723: MILT3520, ASTM A254, 44T531973 and 11 more. Substitute compatibility should be verified for your specific system.
Is 11639723 still available?
11639723 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026