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Technical Data Sheet
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318139 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The SCREW,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, outside_diameter: 2.062 INCHES MINIMUM AND 2.067 INCHES MAXIMUM IN, style_designator: CIRCULAR, aperture_diameter: 1.871 INCHES MINIMUM AND 1.876 INCHES MAXIMUM IN, precious_material: SILVER, surface_treatment: SILVER OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-618-9476, 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
318139
NSN: 5330-00-618-9476
FSC: 5330
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
outside_diameter2.062 INCHES MINIMUM AND 2.067 INCHES MAXIMUM IN
style_designatorCIRCULAR
aperture_diameter1.871 INCHES MINIMUM AND 1.876 INCHES MAXIMUM IN
precious_materialSILVER
surface_treatmentSILVER OVERALL
fsc_application_dataENGINE,AIRCRAFT,TURBO-JET
cross-sectional_thickness0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
cross-sectional_shape_styleHOLLOW
material_document_and_classificationAMS 2410 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5330-00-618-9476
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 318139 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
•
APERTURE DIAMETER: 1.871 INCHES MINIMUM AND 1.876 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 2.062 INCHES MINIMUM AND 2.067 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CIRCULAR
•
CROSS-SECTIONAL THICKNESS: 0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 2410 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
PRECIOUS MATERIAL: SILVER
•
FSC APPLICATION DATA: ENGINE,AIRCRAFT,TURBO-JET
•
SURFACE TREATMENT: SILVER OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE DIAMETER1.871 INCHES MINIMUM AND 1.876 INCHES MAXIMUM IN
OUTSIDE DIAMETER2.062 INCHES MINIMUM AND 2.067 INCHES MAXIMUM IN
STYLE DESIGNATORCIRCULAR
CROSS-SECTIONAL THICKNESS0.093 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 2410 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
PRECIOUS MATERIALSILVER
FSC APPLICATION DATAENGINE,AIRCRAFT,TURBO-JET
SURFACE TREATMENTSILVER OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
CROSS-SECTIONAL SHAPE STYLEHOLLOW
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
MS9375-051Interchangeable
interchangeable cross-reference
interchangeable
SAE-AS9375Interchangeable
interchangeable cross-reference
interchangeable
MS9375-029Interchangeable
interchangeable cross-reference
interchangeable
MS9375-027Interchangeable
interchangeable cross-reference
interchangeable
D83C99Interchangeable
interchangeable cross-reference
interchangeable
MS9375-053Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 318139?
318139 is a SCREW,MACHINE.
What parts can replace 318139?
There are 17 known substitutes for 318139: MS9375-051, SAE-AS9375, MS9375-029 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 318139?
318139 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-618-9476. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026