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218418 — PACKING,PREFORMED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

218418: PACKING,PREFORMED.

The PACKING,PREFORMED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1335 OVERALL, nut_style: HEXAGON, nut_height: 1.030 INCHES MINIMUM AND 1.094 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-081-2453, 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
218418
NSN: 5330-00-081-2453
NIINs: 000812453, 004599792, 014978733
FSC: 5330 — Packing and Gasket Materials
CAGE: 77873 — ROCKFORD POWERTRAIN INC DIV POWERTRAIN ROCKFORD, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1335 OVERALL
nut_styleHEXAGON
nut_height1.030 INCHES MINIMUM AND 1.094 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats1.812 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
nominal_thread_size1.250 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch12
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-081-2453
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 218418 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
•
CROSS-SECTIONAL HEIGHT: 0.214 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: V
•
PERIPHERAL DIAMETER: 2.064 INCHES NOMINAL IN
•
COLOR: BROWN
•
CENTER HOLE DIAMETER: 1.689 INCHES NOMINAL IN
•
MATERIAL: LEATHER OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.214 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEV
PERIPHERAL DIAMETER2.064 INCHES NOMINAL IN
COLORBROWN
CENTER HOLE DIAMETER1.689 INCHES NOMINAL IN
MATERIALLEATHER OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
531617Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
313433Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 218418?
218418 is a PACKING,PREFORMED.
What parts can replace 218418?
There are 2 known substitutes for 218418: 531617, 313433. Substitute compatibility should be verified for your specific system.
What is the NSN for 218418?
218418 is cataloged in the U.S. Government catalog under NSN 5330-00-081-2453. 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.