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Technical Data Sheet
PartsTable / COMPONENT / 1604-81Y
1604-81Y ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

PLUG,PROTECTIVE,DUST AND MOISTUR. Key specifications include material: PLASTIC, drive_type: SCREW SLOT OR SERRATED, design_type: THREADED, thread_class: 1A A, overall_diameter: 1.000 INCHES NOMINAL IN, special_features: COLOR: YELLOW. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-290-7231, 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
1604-81Y
NSN: 5340-00-290-7231
FSC: 5340
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialPLASTIC
drive_typeSCREW SLOT OR SERRATED
design_typeTHREADED
thread_class1A A
overall_diameter1.000 INCHES NOMINAL IN
special_featuresCOLOR: YELLOW
features_providedSHOULDER
thread_size_and_series/type_designator3/4-16 UNF
NSN5340-00-290-7231
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1604-81Y MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DRIVE TYPE: SCREW SLOT
•
DESIGN TYPE: THREADED
•
MATERIAL: PLASTIC
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 3/4-16 UNF
•
OVERALL DIAMETER: 1.000 INCHES NOMINAL IN
•
THREAD CLASS: 3A A
•
FEATURES PROVIDED: SHOULDER
TECHNICAL CHARACTERISTICS (FLIS)
DRIVE TYPESCREW SLOT
DESIGN TYPETHREADED
MATERIALPLASTIC
THREAD SIZE AND SERIES/TYPE DESIGNATOR3/4-16 UNF
OVERALL DIAMETER1.000 INCHES NOMINAL IN
THREAD CLASS3A A
FEATURES PROVIDEDSHOULDER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
1604-81YUpgraded Successor
successor cross-reference
successor
107B8219P2Upgraded Successor
successor cross-reference
successor
MP-81Upgraded Successor
successor cross-reference
successor
69969-81Upgraded Successor
successor cross-reference
successor
M5501/10-F3Upgraded Successor
successor cross-reference
successor
NAS845-1Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1604-81Y?
1604-81Y is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace 1604-81Y?
There are 27 known substitutes for 1604-81Y: 1604-81Y, 107B8219P2, MP-81 and 24 more. Substitute compatibility should be verified for your specific system.
Is 1604-81Y still available?
1604-81Y is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026