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PartsTable / COMPONENT / 2640-921X2
2640-921X2 ✓ 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 material: ALUMINUM ALLOY, overall_length: 7.000 INCHES NOMINAL IN, stem_actuating_end_type: FLATTED AND TUBE, largest_outside_diameter: 0.312 INCHES NOMINAL IN, general_characteristics_item_description: NICKEL-COPPER ALLOY,QQ-N-281 CLASS A; 12.000 IN. O/A LG; 1.500 IN.

H; 2.500 IN. W IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-203-6826, 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
2640-921X2
NSN: 4710-00-203-6826
FSC: 4710
CAGE: 96169 — ELECTRIC BOAT CORPORATION DIV GENERAL DYNAMICS ELECTRIC BOAT (USA)
SPECIFICATIONS
materialALUMINUM ALLOY
overall_length7.000 INCHES NOMINAL IN
stem_actuating_end_typeFLATTED AND TUBE
largest_outside_diameter0.312 INCHES NOMINAL IN
general_characteristics_item_descriptionNICKEL-COPPER ALLOY,QQ-N-281 CLASS A; 12.000 IN. O/A LG; 1.500 IN. H; 2.500 IN. W IN
NSN4710-00-203-6826
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 2640-921X2 · 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
•
DIAMETER: 0.405 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MEASURING METHOD AND LENGTH: 144.000 INCHES MINIMUM RANDOM AND 240.000 INCHES MAXIMUM RANDOM IN
•
MATERIAL: COPPER ALLOY
•
FIRST END STYLE: PLAIN
•
CROSS-SECTIONAL SHAPE STYLE: PLAIN ROUND
•
CONSTRUCTION: SEAMLESS
•
WALL THICKNESS: 0.065 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DIAMETER0.405 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MEASURING METHOD AND LENGTH144.000 INCHES MINIMUM RANDOM AND 240.000 INCHES MAXIMUM RANDOM IN
MATERIALCOPPER ALLOY
FIRST END STYLEPLAIN
CROSS-SECTIONAL SHAPE STYLEPLAIN ROUND
CONSTRUCTIONSEAMLESS
WALL THICKNESS0.065 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
ASTM B43Interchangeable
interchangeable cross-reference
interchangeable
MIL-T-20168Interchangeable
interchangeable cross-reference
interchangeable
2640-921X2PC1S2Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2640-921X2?
2640-921X2 is a TUBE,METALLIC.
What parts can replace 2640-921X2?
There are 3 known substitutes for 2640-921X2: ASTM B43, MIL-T-20168, 2640-921X2PC1S2. Substitute compatibility should be verified for your specific system.
Is 2640-921X2 still available?
2640-921X2 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