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ASTM B68 ✓ 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: 0.250 INCHES NOMINAL IN, material: COPPER, construction: SEAMLESS, heat_treatment: ANNEALED, wall_thickness: 0.049 INCHES NOMINAL IN, first_end_style: PLAIN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-277-4027, 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
ASTM B68
NSN: 4710-00-277-4027
FSC: 4710
CAGE: 81346 — AMERICAN SOCIETY FOR TESTING AND MATERIALS DBA ASTM INTERNATIONAL (USA)
SPECIFICATIONS
diameter0.250 INCHES NOMINAL IN
materialCOPPER
constructionSEAMLESS
heat_treatmentANNEALED
wall_thickness0.049 INCHES NOMINAL IN
first_end_stylePLAIN
operating_pressure2030.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
cross-sectional_shape_stylePLAIN ROUND
measuring_method_and_length600.000 INCHES NOMINAL SPECIFIC IN
specification/standard_data81346-ASTM B280 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
second_end_relationship_with_first_endIDENTICAL
NSN4710-00-277-4027
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: ASTM B68 · 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: 0.375 INCHES NOMINAL IN
•
WALL THICKNESS: 0.032 INCHES NOMINAL IN
•
FIRST END STYLE: PLAIN
•
HEAT TREATMENT: COLD DRAWN
•
MEASURING METHOD AND LENGTH: 144.000 INCHES MINIMUM RANDOM AND 240.000 INCHES MAXIMUM RANDOM IN
•
DEPARTURE FROM CITED DOCUMENT: AS MODIFIED BY COLD-DRAWN
•
OPERATING PRESSURE: 1100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
•
MATERIAL: COPPER
TECHNICAL CHARACTERISTICS (FLIS)
DIAMETER0.375 INCHES NOMINAL IN
WALL THICKNESS0.032 INCHES NOMINAL IN
FIRST END STYLEPLAIN
HEAT TREATMENTCOLD DRAWN
MEASURING METHOD AND LENGTH144.000 INCHES MINIMUM RANDOM AND 240.000 INCHES MAXIMUM RANDOM IN
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY COLD-DRAWN
OPERATING PRESSURE1100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
MATERIALCOPPER
CONSTRUCTIONSEAMLESS
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
B75-68Interchangeable
interchangeable cross-reference
interchangeable
ASTMB75Interchangeable
interchangeable cross-reference
interchangeable
BB3338Interchangeable
interchangeable cross-reference
interchangeable
P4403Interchangeable
interchangeable cross-reference
interchangeable
31095RInterchangeable
interchangeable cross-reference
interchangeable
34419RInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ASTM B68?
ASTM B68 is a TUBE,METALLIC.
What parts can replace ASTM B68?
There are 16 known substitutes for ASTM B68: B75-68, ASTMB75, BB3338 and 13 more. Substitute compatibility should be verified for your specific system.
Is ASTM B68 still available?
ASTM B68 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026