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4181173 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

PNEUMATIC MUFFLER,EXHAUST-INTAKE. Key specifications include material: ALUMINUM ALLOY LOCATION NOT OTHERWISE SPECIFIED, body_shape: ROUND, overall_width: 0.44 INCHES NOMINAL IN, overall_diameter: 0.50 INCHES NOMINAL IN, inlet_connection_type: THREADED FIRST OUTLET, end_item_identification: 2355-01-641-2096. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-686-5265, 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
4181173
NSN: 4730-01-686-5265
FSC: 4730
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY LOCATION NOT OTHERWISE SPECIFIED
body_shapeROUND
overall_width0.44 INCHES NOMINAL IN
overall_diameter0.50 INCHES NOMINAL IN
inlet_connection_typeTHREADED FIRST OUTLET
end_item_identification2355-01-641-2096
inlet_connection_quantity1
part_name_assigned_by_controlling_agencyMUFFLER,EXHAUST,WINCH
NSN4730-01-686-5265
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 4181173 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OVERALL DIAMETER: 0.50 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY LOCATION NOT OTHERWISE SPECIFIED
•
INLET CONNECTION TYPE: THREADED FIRST OUTLET
•
BODY SHAPE: ROUND
•
INLET CONNECTION QUANTITY: 1
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER0.50 INCHES NOMINAL IN
OVERALL WIDTH0.44 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYMUFFLER,EXHAUST,WINCH
MATERIALALUMINUM ALLOY LOCATION NOT OTHERWISE SPECIFIED
INLET CONNECTION TYPETHREADED FIRST OUTLET
BODY SHAPEROUND
END ITEM IDENTIFICATION2355-01-641-2096
INLET CONNECTION QUANTITY1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
7130-1Interchangeable
interchangeable cross-reference
interchangeable
SCD7130Interchangeable
interchangeable cross-reference
interchangeable
7130-1LInterchangeable
interchangeable cross-reference
interchangeable
2BC422Interchangeable
interchangeable cross-reference
interchangeable
7130100Interchangeable
interchangeable cross-reference
interchangeable
40403-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4181173?
4181173 is a PNEUMATIC MUFFLER,EXHAUST-INTAKE.
What parts can replace 4181173?
There are 9 known substitutes for 4181173: 7130-1, SCD7130, 7130-1L and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4181173?
4181173 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-686-5265. 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