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Technical Data Sheet
PartsTable / COMPONENT / 751377-1
751377-1 ✓ 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,AIR DUCT is a the manufacturer industrial component. Key specifications include material: FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SINGLE PLY, wall_thickness: 0.040 INCHES NOMINAL IN, connection_type: PLAIN FIRST END, inside_diameter: 3.500 INCHES NOMINAL FIRST END IN, style_designator: SLEEVE SECTION, features_provided: OZONE RESISTANT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-915-3650, 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
751377-1
NSN: 4720-00-915-3650
FSC: 4720
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialFIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SINGLE PLY
wall_thickness0.040 INCHES NOMINAL IN
connection_typePLAIN FIRST END
inside_diameter3.500 INCHES NOMINAL FIRST END IN
style_designatorSLEEVE SECTION
features_providedOZONE RESISTANT
cross-sectional_shape_styleROUND
measuring_method_and_length2.000 INCHES NOMINAL OVERALL IN
NSN4720-00-915-3650
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 751377-1 · 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
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
WALL THICKNESS: 0.040 INCHES NOMINAL IN
•
FEATURES PROVIDED: OZONE RESISTANT
•
STYLE DESIGNATOR: SLEEVE SECTION
•
INSIDE DIAMETER: 3.500 INCHES NOMINAL FIRST END IN
•
MATERIAL: FIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SINGLE PLY
•
CONNECTION TYPE: PLAIN FIRST END
•
MEASURING METHOD AND LENGTH: 2.000 INCHES NOMINAL OVERALL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEROUND
WALL THICKNESS0.040 INCHES NOMINAL IN
FEATURES PROVIDEDOZONE RESISTANT
STYLE DESIGNATORSLEEVE SECTION
INSIDE DIAMETER3.500 INCHES NOMINAL FIRST END IN
MATERIALFIBERGLASS AND RUBBER CHLOROPRENE CLASS CR SINGLE PLY
CONNECTION TYPEPLAIN FIRST END
MEASURING METHOD AND LENGTH2.000 INCHES NOMINAL OVERALL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
50781Interchangeable
interchangeable cross-reference
interchangeable
556-3733Interchangeable
interchangeable cross-reference
interchangeable
A20BInterchangeable
interchangeable cross-reference
interchangeable
SC-B-171561Interchangeable
interchangeable cross-reference
interchangeable
SM-B-171561Interchangeable
interchangeable cross-reference
interchangeable
266699-1005Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 751377-1?
751377-1 is a HOSE,AIR DUCT.
What parts can replace 751377-1?
There are 8 known substitutes for 751377-1: 50781, 556-3733, A20B and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 751377-1?
751377-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4720-00-915-3650. 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