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6603141 ✓ 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

The GEAR,INTERNAL is a the manufacturer industrial component. Key specifications include material: STEEL, gear_type: WORM, body_style: WEBBED, OFFSET, SOLID, bore_style: W/COUNTERBORE SECOND END, teeth_type: SPUR, tooth_form: STUB. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-413-8271, 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
6603141
NSN: 4730-01-413-8271
FSC: 4730
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialSTEEL
gear_typeWORM
body_styleWEBBED, OFFSET, SOLID
bore_styleW/COUNTERBORE SECOND END
teeth_typeSPUR
tooth_formSTUB
pitch_diameter9.2500 INCHES NOMINAL IN
pressure_angle20.0000 DEGREES
teeth_quantity74
hardness_rating28.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM BODY
special_featuresHUB END EXTERNAL THREADED 5.750-12 UN-2A, AND 60 SPLINES BETWEEN FIRST AND SECOND GROOVE, GEAR USED ON VALVE OPERATOR A
style_designatorSOLID BACK RING, PROTRUDING HUB
NSN4730-01-413-8271
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 6603141 · 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
•
NOMINAL THREAD SIZE: 0.500 INCHES EXTERNAL IN
•
THREAD SERIES DESIGNATOR: NPT EXTERNAL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.500 INCHES EXTERNAL IN
END ITEM IDENTIFICATIONVALVE SWING,SEAWOLF CLASS SSN
THREAD SERIES DESIGNATORNPT EXTERNAL
MATERIALSTEEL CORROSION RESISTING OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
137894Interchangeable
interchangeable cross-reference
interchangeable
1/2 NPTInterchangeable
interchangeable cross-reference
interchangeable
221-1404Interchangeable
interchangeable cross-reference
interchangeable
845-6800704-157Interchangeable
interchangeable cross-reference
interchangeable
845-6603141-157Interchangeable
interchangeable cross-reference
interchangeable
835-6556499Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6603141?
6603141 is a GEAR,INTERNAL.
What parts can replace 6603141?
There are 11 known substitutes for 6603141: 137894, 1/2 NPT, 221-1404 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6603141?
6603141 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-413-8271. 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