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312518 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

312518: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT, seal_width: 0.125 INCHES NOMINAL IN, housing_bore_diameter: 1.000 INCHES NOMINAL IN, accommodated_shaft_diameter: 0.750 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: OIL SEAL. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-516-7706, 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
312518
NSN: 5330-01-516-7706
FSC: 5330 — Packing and Gasket Materials
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
seal_width0.125 INCHES NOMINAL IN
housing_bore_diameter1.000 INCHES NOMINAL IN
accommodated_shaft_diameter0.750 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencyOIL SEAL
NSN5330-01-516-7706
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 312518 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
•
SEAL WIDTH: 0.125 INCHES NOMINAL IN
•
HOUSING BORE DIAMETER: 1.000 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT DIAMETER: 0.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.125 INCHES NOMINAL IN
HOUSING BORE DIAMETER1.000 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER0.750 INCHES NOMINAL IN
PART NAME ASSIGNED BY CONTROLLING AGENCYOIL SEAL
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 312518?
312518 is a SEAL,PLAIN ENCASED.
What is the NSN for 312518?
312518 is cataloged in the U.S. Government catalog under NSN 5330-01-516-7706. 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.