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Technical Data Sheet
PartsTable / COMPONENT / IT-121-9
IT-121-9 ✓ 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 RESISTOR SET,MATCHED is a the manufacturer industrial component. Key specifications include material: FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR FIRST PLY, connection_type: PLAIN BOTH ENDS, inside_diameter: 2.250 INCHES NOMINAL FIRST END IN, style_designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED, features_provided: OZONE RESISTANT, end_item_identification: GRUMMAN, A-10 ACFT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-268-6451, 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
IT-121-9
NSN: 4720-00-268-6451
FSC: 4720
CAGE: 26831 — INDUSTRIAL TUBE CO LLC DBA INDUSTRIAL TUBE CO LLC DIV INDUSTRIAL TUBE COMPANY, LLC (USA)
SPECIFICATIONS
materialFIBERGLASS AND RUBBER CHLOROPRENE CLASS CR FIRST PLY
connection_typePLAIN BOTH ENDS
inside_diameter2.250 INCHES NOMINAL FIRST END IN
style_designatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
features_providedOZONE RESISTANT
end_item_identificationGRUMMAN, A-10 ACFT
cross-sectional_shape_styleROUND
NSN4720-00-268-6451
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: IT-121-9 · 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
•
MATERIAL: FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR THIRD PLY
•
CONNECTION TYPE: PLAIN BOTH ENDS
•
STYLE DESIGNATOR: HELICALLY WOUND CONTINOUS WIRE SUPPORTED
•
FEATURES PROVIDED: OZONE RESISTANT
•
INSIDE DIAMETER: 2.250 INCHES NOMINAL FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALFIBERGLASS AND RUBBER CHLOROPRENE CLASS CR THIRD PLY
CONNECTION TYPEPLAIN BOTH ENDS
STYLE DESIGNATORHELICALLY WOUND CONTINOUS WIRE SUPPORTED
MATERIALFIBERGLASS AND RUBBER CHLOROPRENE CLASS CR FIRST PLY
FEATURES PROVIDEDOZONE RESISTANT
INSIDE DIAMETER2.250 INCHES NOMINAL FIRST END IN
MATERIALSTEEL REINFORCING WIRE
MATERIALFIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SECOND PLY
CROSS-SECTIONAL SHAPE STYLEROUND
END ITEM IDENTIFICATIONGRUMMAN, A-10 ACFT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
13216E0005Interchangeable
interchangeable cross-reference
interchangeable
202831Interchangeable
interchangeable cross-reference
interchangeable
M-4072-1Interchangeable
interchangeable cross-reference
interchangeable
63SB1 3-4Interchangeable
interchangeable cross-reference
interchangeable
85686Interchangeable
interchangeable cross-reference
interchangeable
32039Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is IT-121-9?
IT-121-9 is a RESISTOR SET,MATCHED.
What parts can replace IT-121-9?
There are 22 known substitutes for IT-121-9: 13216E0005, 202831, M-4072-1 and 19 more. Substitute compatibility should be verified for your specific system.
Is IT-121-9 still available?
IT-121-9 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