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Technical Data Sheet
PartsTable / COMPONENT / F4688PC121
F4688PC121 ✓ 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: 0.750 INCHES NOMINAL IN, material: COPPER, construction: SEAMLESS, wall_thickness: 0.042 INCHES NOMINAL IN, first_end_style: PLAIN, cross-sectional_shape_style: PLAIN ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-339-2536, 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
F4688PC121
NSN: 4710-00-339-2536
FSC: 4710
CAGE: 0AT62 — SIEMENS ENERGY, INC. DBA DRESSER-RAND (USA)
SPECIFICATIONS
diameter0.750 INCHES NOMINAL IN
materialCOPPER
constructionSEAMLESS
wall_thickness0.042 INCHES NOMINAL IN
first_end_stylePLAIN
cross-sectional_shape_stylePLAIN ROUND
measuring_method_and_length26.500 INCHES NOMINAL SPECIFIC IN
second_end_relationship_with_first_endIDENTICAL
NSN4710-00-339-2536
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: F4688PC121 · 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
•
WALL THICKNESS: 0.042 INCHES NOMINAL IN
•
MATERIAL: COPPER
•
CROSS-SECTIONAL SHAPE STYLE: PLAIN ROUND
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
CONSTRUCTION: SEAMLESS
•
MEASURING METHOD AND LENGTH: 26.500 INCHES NOMINAL SPECIFIC IN
•
FIRST END STYLE: PLAIN
•
DIAMETER: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
WALL THICKNESS0.042 INCHES NOMINAL IN
MATERIALCOPPER
CROSS-SECTIONAL SHAPE STYLEPLAIN ROUND
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
CONSTRUCTIONSEAMLESS
MEASURING METHOD AND LENGTH26.500 INCHES NOMINAL SPECIFIC IN
FIRST END STYLEPLAIN
DIAMETER0.750 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
N358PC121Interchangeable
Same NIIN cross-reference
interchangeable
N475PC121Interchangeable
Same NIIN cross-reference
interchangeable
F4689PC121Interchangeable
Same NIIN cross-reference
interchangeable
N565PC121Interchangeable
Same NIIN cross-reference
interchangeable
N440PC121Interchangeable
Same NIIN cross-reference
interchangeable
N599PC121Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F4688PC121?
F4688PC121 is a TUBE,METALLIC.
What parts can replace F4688PC121?
There are 10 known substitutes for F4688PC121: N358PC121, N475PC121, F4689PC121 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for F4688PC121?
F4688PC121 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4710-00-339-2536. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026