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EH0258 — SEAL,NONMETALLIC SPECIAL SHAPED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

EH0258: SEAL,NONMETALLIC SPECIAL SHAPED.

SEAL,NONMETALLIC SPECIAL SHAPED. Key specifications include construction: ONE-PIECE, special_features: USED ON THE METERING PUMP, EZB20D1-VC OR EZB21D1-VC. FITS UNDERNEATH THE STROKE FREQUENCY KNOB EH0868., end_item_identification: LCS 2 COMBAT SHIP, part_name_assigned_by_controlling_agency: SEAL, STROKE FREQUENCY.

This part is cataloged in the U.S. Government catalog under NSN 5330-01-568-6683, 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
EH0258
NSN: 5330-01-568-6683
FSC: 5330 — Packing and Gasket Materials
CAGE: 30128 — WALCHEM CORP (USA)
SPECIFICATIONS
constructionONE-PIECE
special_featuresUSED ON THE METERING PUMP, EZB20D1-VC OR EZB21D1-VC. FITS UNDERNEATH THE STROKE FREQUENCY KNOB EH0868.
end_item_identificationLCS 2 COMBAT SHIP
part_name_assigned_by_controlling_agencySEAL, STROKE FREQUENCY
NSN5330-01-568-6683
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: EH0258 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
•
CONSTRUCTION: ONE-PIECE
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESUSED ON THE METERING PUMP, EZB20D1-VC OR EZB21D1-VC. FITS UNDERNEATH THE STROKE FREQUENCY KNOB EH0868.
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL, STROKE FREQUENCY
END ITEM IDENTIFICATIONLCS 2 COMBAT SHIP
CONSTRUCTIONONE-PIECE
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES 1
INST MAN EZ-SERIES IT.45Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is EH0258?
EH0258 is a SEAL,NONMETALLIC SPECIAL SHAPED.
What parts can replace EH0258?
There is 1 known substitute for EH0258: INST MAN EZ-SERIES IT.45. Substitute compatibility should be verified for your specific system.
What is the NSN for EH0258?
EH0258 is cataloged in the U.S. Government catalog under NSN 5330-01-568-6683. 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.