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C20746-1 — HOSE ASSEMBLY,AIR BREATHING

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

C20746-1: HOSE ASSEMBLY,AIR BREATHING.

The HOSE ASSEMBLY,AIR BREATHING is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON COVER, vacuum_rating: 29.9 INCHES OF MERCURY IN, connection_type: THREADED BOTH ENDS, inside_diameter: 0.190 INCHES NOMINAL FIRST END IN, style_designator: HELICALLY WOUND CONTINOUS WIRE SUPPORTED, features_provided: OZONE RESISTANT AND ABRASION RESISTANT. This part is cataloged in the U.S.

Government catalog under NSN 4720-01-487-8159, 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
C20746-1
NSN: 4720-01-487-8159
FSC: 4720 — Hose and Flexible Tubing
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON COVER
vacuum_rating29.9 INCHES OF MERCURY IN
connection_typeTHREADED BOTH ENDS
inside_diameter0.190 INCHES NOMINAL FIRST END IN
style_designatorHELICALLY WOUND CONTINOUS WIRE SUPPORTED
features_providedOZONE RESISTANT AND ABRASION RESISTANT
operating_pressure105.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
end_item_identificationF16 AIRCRAFT
cross-sectional_shape_styleROUND
measuring_method_and_length16.500 INCHES NOMINAL OVERALL IN
material_document_and_classificationZZ-R-765,CLASS 3A OR 3B,GRADE 50 FED SPEC SINGLE MATERIAL RESPONSE FIRST PLY A
part_name_assigned_by_controlling_agencyHOSE,OXYGEN,PERSONAL LEADS
NSN4720-01-487-8159
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: C20746-1 · 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
•
MEASURING METHOD AND LENGTH: 16.500 INCHES NOMINAL OVERALL IN
•
VACUUM RATING: 29.9 INCHES OF MERCURY IN
•
CONNECTION TYPE: THREADED BOTH ENDS
•
STYLE DESIGNATOR: HELICALLY WOUND CONTINOUS WIRE SUPPORTED
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-H-81581/3A MIL SPEC SINGLE MATERIAL RESPONSE COVER A
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
TECHNICAL CHARACTERISTICS
MEASURING METHOD AND LENGTH16.500 INCHES NOMINAL OVERALL IN
VACUUM RATING29.9 INCHES OF MERCURY IN
CONNECTION TYPETHREADED BOTH ENDS
STYLE DESIGNATORHELICALLY WOUND CONTINOUS WIRE SUPPORTED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-H-81581/3A MIL SPEC SINGLE MATERIAL RESPONSE COVER A
MATERIAL DOCUMENT AND CLASSIFICATIONZZ-R-765,CLASS 3A OR 3B,GRADE 50 FED SPEC SINGLE MATERIAL RESPONSE FIRST PLY A
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-423,FORM 1,CONDITION B,COMPOSITION 302 FED SPEC SINGLE MATERIAL RESPONSE REINFORCING WIRE
CROSS-SECTIONAL SHAPE STYLEROUND
OPERATING PRESSURE105.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
FEATURES PROVIDEDOZONE RESISTANT AND ABRASION RESISTANT
OTHER ITEMS IN FSC 4720 — Hose and Flexible Tubing
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4720-00-000-0080 4720-00-000-0081 4720-00-000-0084 4720-00-000-0724 4720-00-001-0014 4720-00-001-0015 4720-00-001-0023 4720-00-001-0025
SUBSTITUTES & CROSS-REFERENCES 3
REDAR-A11359-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4720PL0844612Reference document
Same NSN cross-reference
Reference document — Informative reference only
4720PL1748655Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is C20746-1?
C20746-1 is a HOSE ASSEMBLY,AIR BREATHING.
What parts can replace C20746-1?
There are 3 known substitutes for C20746-1: REDAR-A11359-1, 4720PL0844612, 4720PL1748655. Substitute compatibility should be verified for your specific system.
What is the NSN for C20746-1?
C20746-1 is cataloged in the U.S. Government catalog under NSN 4720-01-487-8159. This indicates validated use in U.S. government and defense supply chains.
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