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Technical Data Sheet
PartsTable / COMPONENT / C2858-8
C2858-8 ✓ 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 SHIELD,EXPANSION is a the manufacturer industrial component. Key specifications include material: STEEL, overall_length: 0.225 INCHES NOMINAL IN, style_designator: SINGLE EXPANSION MACHINE SCREW, thread_provision: UNTHREADED, features_provided: CLOSED END, surface_treatment: PASSIVATE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-915-2387, 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
C2858-8
NSN: 5340-00-915-2387
FSC: 5340
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)
SPECIFICATIONS
materialSTEEL
unit_quantity2
overall_length0.225 INCHES NOMINAL IN
style_designatorSINGLE EXPANSION MACHINE SCREW
thread_provisionUNTHREADED
features_providedCLOSED END
surface_treatmentPASSIVATE
hole_accommodation_diameter0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
insert_type_for_which_designedNAILED
NSN5340-00-915-2387
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: C2858-8 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
•
UNIT QUANTITY: 2
•
SURFACE TREATMENT: PASSIVATE
•
STYLE DESIGNATOR: SINGLE EXPANSION MACHINE SCREW
•
MATERIAL: STEEL
•
FEATURES PROVIDED: CLOSED END
•
THREAD PROVISION: UNTHREADED
•
INSERT TYPE FOR WHICH DESIGNED: NAILED
TECHNICAL CHARACTERISTICS (FLIS)
UNIT QUANTITY2
SURFACE TREATMENTPASSIVATE
STYLE DESIGNATORSINGLE EXPANSION MACHINE SCREW
OVERALL LENGTH0.225 INCHES NOMINAL IN
MATERIALSTEEL
FEATURES PROVIDEDCLOSED END
THREAD PROVISIONUNTHREADED
INSERT TYPE FOR WHICH DESIGNEDNAILED
HOLE ACCOMMODATION DIAMETER0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
12267812-1Upgraded Successor
successor cross-reference
successor
6836712-250Upgraded Successor
successor cross-reference
successor
PLGA2500020AUpgraded Successor
successor cross-reference
successor
8646Interchangeable
interchangeable cross-reference
interchangeable
S3500Interchangeable
interchangeable cross-reference
interchangeable
250002Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C2858-8?
C2858-8 is a SHIELD,EXPANSION.
What parts can replace C2858-8?
There are 13 known substitutes for C2858-8: 12267812-1, 6836712-250, PLGA2500020A and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C2858-8?
C2858-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-915-2387. 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