PartsTable
Technical Data Sheet

718257-1/4 — WASHER,SEAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

718257-1/4: WASHER,SEAL.

The WASHER,SEAL is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, hole_diameter: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN, outside_diameter: 0.562 INCHES NOMINAL0.562 INCHES NOMINAL IN, style_designator: CONCAVE, end_item_identification: RF-382A-15RF-382A-15 A. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-411-5871, 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
718257-1/4
NSN: 5330-01-411-5871
NIINs: 014115871, 015183754
FSC: 5330 — Packing and Gasket Materials
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
hole_diameter0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
outside_diameter0.562 INCHES NOMINAL0.562 INCHES NOMINAL IN
style_designatorCONCAVE
end_item_identificationRF-382A-15RF-382A-15 A
NSN5330-01-411-5871
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 718257-1/4 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
•
OUTSIDE DIAMETER: 0.562 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SPECIAL
•
RETAINER THICKNESS: 0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
•
CONSTRUCTION: TWO-PIECE
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.562 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESPECIAL
RETAINER THICKNESS0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
MATERIALSTEEL COMP 303 OR STEEL COMP 304 RETAINER
CONSTRUCTIONTWO-PIECE
SUBSTITUTES & CROSS-REFERENCES 1
6098096Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
Ready to buy 718257-1/4?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 718257-1/4?
718257-1/4 is a WASHER,SEAL.
What parts can replace 718257-1/4?
There is 1 known substitute for 718257-1/4: 6098096. Substitute compatibility should be verified for your specific system.
What is the NSN for 718257-1/4?
718257-1/4 is cataloged in the U.S. Government catalog under NSN 5330-01-411-5871. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 718257-1/4

✓ 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.