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9003557 ✓ 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 FAN,CIRCULATING is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. Key specifications include end_item_identification: BIPOLAR AMPLIFIER 9000901-107, criticality_code_justification: AGAV. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-142-2793, 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
9003557
NSN: 4730-00-142-2793
FSC: 4730
CAGE: 34161 — KOEHRING CO (USA)
SPECIFICATIONS
end_item_identificationBIPOLAR AMPLIFIER 9000901-107
criticality_code_justificationAGAV
NSN4730-00-142-2793
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 9003557 · 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
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
THREAD PITCH DIAMETERS: +0.9470 TO 0.9530 INCHES IN
•
THREAD LENGTH: 0.312 INCHES NOMINAL IN
•
SMALLEST INSIDE DIAMETER: 0.656 INCHES NOMINAL IN
•
STYLE DESIGNATOR: HEXAGON, EXTERNAL THREAD, BOSS
•
SCREW THREAD LOCATION: EXTERNAL
•
WIDTH ACROSS FLATS: 1.000 INCHES NOMINAL IN
•
MATERIAL: STEEL
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS (FLIS)
CASEHARDENING INDICATORNOT CASEHARDENED
THREAD PITCH DIAMETERS+0.9470 TO 0.9530 INCHES IN
THREAD LENGTH0.312 INCHES NOMINAL IN
SMALLEST INSIDE DIAMETER0.656 INCHES NOMINAL IN
STYLE DESIGNATORHEXAGON, EXTERNAL THREAD, BOSS
SCREW THREAD LOCATIONEXTERNAL
WIDTH ACROSS FLATS1.000 INCHES NOMINAL IN
MATERIALSTEEL
SCREW THREAD SERIES DESIGNATORUNS
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
140107Interchangeable
interchangeable cross-reference
interchangeable
9000942Interchangeable
interchangeable cross-reference
interchangeable
9003557Interchangeable
interchangeable cross-reference
interchangeable
9003672-1Interchangeable
interchangeable cross-reference
interchangeable
182-584Interchangeable
interchangeable cross-reference
interchangeable
900V3557Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9003557?
9003557 is a FAN,CIRCULATING.
What parts can replace 9003557?
There are 7 known substitutes for 9003557: 140107, 9000942, 9003557 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9003557?
9003557 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-142-2793. 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