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3011218 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3011218: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE CLASS Q SEALING ELEMENT, case_style: SHOULDERED, seal_width: 0.437 INCHES NOMINAL IN, housing_bore_diameter: 1.190 INCHES NOMINAL IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 0.720 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-286-8764, 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
3011218
NSN: 5315-00-286-8764
NIINs: 002868764, 009383237
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 88535 — ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES (USA)
SPECIFICATIONS
materialRUBBER SILICONE CLASS Q SEALING ELEMENT
case_styleSHOULDERED
seal_width0.437 INCHES NOMINAL IN
housing_bore_diameter1.190 INCHES NOMINAL IN
sealing_element_styleANGULAR
accommodated_shaft_diameter0.720 INCHES NOMINAL IN
NSN5315-00-286-8764
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3011218 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST END STYLE: SQUARE
•
PIN OVERALL DIAMETER: 0.0310 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 0.156 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: ALUMINUM ALLOY OR NICKEL OR STEEL CORROSION RESISTING OVERALL
TECHNICAL CHARACTERISTICS
FIRST END STYLESQUARE
PIN OVERALL DIAMETER0.0310 INCHES NOMINAL IN
PIN OVERALL LENGTH0.156 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALALUMINUM ALLOY OR NICKEL OR STEEL CORROSION RESISTING OVERALL
SUBSTITUTES & CROSS-REFERENCES 1
0-521-218Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3011218?
3011218 is a SEAL,PLAIN ENCASED.
What parts can replace 3011218?
There is 1 known substitute for 3011218: 0-521-218. Substitute compatibility should be verified for your specific system.
What is the NSN for 3011218?
3011218 is cataloged in the U.S. Government catalog under NSN 5315-00-286-8764. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.