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81583 ✓ 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 PLATE ASSY is a the manufacturer industrial component. Key specifications include material: PLASTIC, drive_type: SCREW SLOT, design_type: THREADED, thread_class: 3A A, overall_diameter: 1.000 INCHES NOMINAL IN, features_provided: SHOULDER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-050-7657, 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
81583
NSN: 4730-00-050-7657
FSC: 4730
CAGE: 81982 — HYDRO-AIRE AEROSPACE CORP (USA)
SPECIFICATIONS
materialPLASTIC
drive_typeSCREW SLOT
design_typeTHREADED
thread_class3A A
overall_diameter1.000 INCHES NOMINAL IN
features_providedSHOULDER
thread_size_and_series/type_designator3/4-16 UNF
NSN4730-00-050-7657
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 81583 · 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
•
MALE END SCREW THREAD SERIES DESIGNATOR: UN
•
FEMALE END SCREW THREAD SERIES DESIGNATOR: UNF
•
MATERIAL: ALUMINUM ALLOY 2024
•
FEMALE END THREAD DIRECTION: RIGHT-HAND
•
MALE END THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
MALE END SCREW THREAD SERIES DESIGNATORUN
FEMALE END SCREW THREAD SERIES DESIGNATORUNF
MATERIALALUMINUM ALLOY 2024
FEMALE END THREAD DIRECTIONRIGHT-HAND
MALE END THREAD DIRECTIONRIGHT-HAND
END ITEM IDENTIFICATIONHELICOPTER, CH-53A/D/E A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
81583Interchangeable
interchangeable cross-reference
interchangeable
1604-81Interchangeable
interchangeable cross-reference
interchangeable
462095Interchangeable
interchangeable cross-reference
interchangeable
081583Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 81583?
81583 is a PLATE ASSY.
What parts can replace 81583?
There are 4 known substitutes for 81583: 81583, 1604-81, 462095 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 81583?
81583 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-050-7657. 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