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Technical Data Sheet
PartsTable / COMPONENT / CH556
CH556 ✓ 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 HOSE,PREFORMED is a the manufacturer industrial component. Key specifications include end_item_identification: CONTROL UNIT, ICSCU, part_name_assigned_by_controlling_agency: AMPLIFIER INPUT MOD. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-689-2977, 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
CH556
NSN: 4720-00-689-2977
FSC: 4720
CAGE: 20796 — MUVIQ USA, LLC (USA)
SPECIFICATIONS
end_item_identificationCONTROL UNIT, ICSCU
part_name_assigned_by_controlling_agencyAMPLIFIER INPUT MOD
NSN4720-00-689-2977
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: CH556 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
375-2056P7Interchangeable
interchangeable cross-reference
interchangeable
1041-1Interchangeable
interchangeable cross-reference
interchangeable
2060-7Interchangeable
interchangeable cross-reference
interchangeable
TT101-2Interchangeable
interchangeable cross-reference
interchangeable
17-12149-1Interchangeable
interchangeable cross-reference
interchangeable
2653472-8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is CH556?
CH556 is a HOSE,PREFORMED.
What parts can replace CH556?
There are 11 known substitutes for CH556: 375-2056P7, 1041-1, 2060-7 and 8 more. Substitute compatibility should be verified for your specific system.
Is CH556 still available?
CH556 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