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PartsTable / COMPONENT / 212661
212661 ✓ 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: ALUMINUM ALLOY 3003, drive_type: SERRATED OR SQUARE HEAD OR HEX SOCKET, design_type: THREADED, overall_diameter: 1.000 INCHES NOMINAL IN, surface_treatment: CHROMATE OR ANODIZE, nondefinitive_spec/std_data: 3 TYPE AND A CLASS AND 25 SIZE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-804-1228, 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
212661
NSN: 5340-00-804-1228
FSC: 5340
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialALUMINUM ALLOY 3003
drive_typeSERRATED OR SQUARE HEAD OR HEX SOCKET
design_typeTHREADED
overall_diameter1.000 INCHES NOMINAL IN
surface_treatmentCHROMATE OR ANODIZE
nondefinitive_spec/std_data3 TYPE AND A CLASS AND 25 SIZE
material_document_and_classificationQQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
thread_size_and_series/type_designator1/2-20 NF
surface_treatment_document_and_classificationMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE A
NSN5340-00-804-1228
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 212661 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
•
MATERIAL: ALUMINUM ALLOY 3003
•
OVERALL DIAMETER: 1.000 INCHES NOMINAL IN
•
SURFACE TREATMENT: CHROMATE OR ANODIZE
•
DESIGN TYPE: THREADED
•
NONDEFINITIVE SPEC/STD DATA: 3 TYPE AND A CLASS AND 25 SIZE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1/2-20 NF
•
DRIVE TYPE: SERRATED OR SQUARE HEAD OR HEX SOCKET
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM ALLOY 3003
OVERALL DIAMETER1.000 INCHES NOMINAL IN
SURFACE TREATMENTCHROMATE OR ANODIZE
DESIGN TYPETHREADED
NONDEFINITIVE SPEC/STD DATA3 TYPE AND A CLASS AND 25 SIZE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/2 FED SPEC SINGLE MATERIAL RESPONSE
THREAD SIZE AND SERIES/TYPE DESIGNATOR1/2-20 NF
DRIVE TYPESERRATED OR SQUARE HEAD OR HEX SOCKET
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541, CLASS 1A MIL SPEC SINGLE TREATMENT RESPONSE OR MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 34
5340PL1866828Interchangeable
interchangeable cross-reference
interchangeable
81584Interchangeable
interchangeable cross-reference
interchangeable
10160009Interchangeable
interchangeable cross-reference
interchangeable
M5501/1-4Interchangeable
interchangeable cross-reference
interchangeable
10117358Interchangeable
interchangeable cross-reference
interchangeable
5-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 212661?
212661 is a PLUG,PROTECTIVE,DUST AND MOISTUR.
What parts can replace 212661?
There are 34 known substitutes for 212661: 5340PL1866828, 81584, 10160009 and 31 more. Substitute compatibility should be verified for your specific system.
Is 212661 still available?
212661 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