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3H90057 ✓ 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 DUST COVER ASSEMBLY is a the manufacturer industrial component. Key specifications include special_features: WEAPON SYSTEM ESSENTIAL, end_item_identification: C-141 STARLIFTER AIRCRAFT, criticality_code_justification: FEAT, general_characteristics_item_description: C/O 1 EA MANIFOLD OUTLET NIPPLE,1 EA NIPPLE DUST COVER,1 EA RETENTION CORD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-011-0050, 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
3H90057
NSN: 4730-00-011-0050
FSC: 4730
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
special_featuresWEAPON SYSTEM ESSENTIAL
end_item_identificationC-141 STARLIFTER AIRCRAFT
criticality_code_justificationFEAT
general_characteristics_item_descriptionC/O 1 EA MANIFOLD OUTLET NIPPLE,1 EA NIPPLE DUST COVER,1 EA RETENTION CORD
NSN4730-00-011-0050
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3H90057 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: C/O 1 EA MANIFOLD OUTLET NIPPLE,1 EA NIPPLE DUST COVER,1 EA RETENTION CORD
•
CRITICALITY CODE JUSTIFICATION: FEAT
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESWEAPON SYSTEM ESSENTIAL
GENERAL CHARACTERISTICS ITEM DESCRIPTIONC/O 1 EA MANIFOLD OUTLET NIPPLE,1 EA NIPPLE DUST COVER,1 EA RETENTION CORD
CRITICALITY CODE JUSTIFICATIONFEAT
END ITEM IDENTIFICATIONC-141 STARLIFTER AIRCRAFT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
4651Interchangeable
interchangeable cross-reference
interchangeable
11011102Interchangeable
interchangeable cross-reference
interchangeable
4650Interchangeable
interchangeable cross-reference
interchangeable
3H90057-103Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3H90057?
3H90057 is a DUST COVER ASSEMBLY.
What parts can replace 3H90057?
There are 4 known substitutes for 3H90057: 4651, 11011102, 4650 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3H90057?
3H90057 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-011-0050. 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