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278663 — SEAL,ANTIPILFERAGE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

278663: SEAL,ANTIPILFERAGE.

The SEAL,ANTIPILFERAGE is a the manufacturer industrial component. Key specifications include shape: CIRCULAR, length: 6.250 INCHES NOMINAL IN, diameter: 0.250 INCHES NOMINAL IN, material: LEAD, wire_length: 6.000 INCHES NOMINAL IN, features_provided: WIRE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-297-2886, 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
278663
NSN: 5340-01-297-2886
FSC: 5340 — Hardware, Commercial
CAGE: 70359 — AMERICAN CASTING AND MFG CORP (USA)
SPECIFICATIONS
shapeCIRCULAR
length6.250 INCHES NOMINAL IN
diameter0.250 INCHES NOMINAL IN
materialLEAD
wire_length6.000 INCHES NOMINAL IN
hole_quantity1
strand_quantity1
features_providedWIRE
awg_size_designation7
wire/cord_diameter_for_which_designed0.018 INCHES IN
NSN5340-01-297-2886
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 278663 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
•
WIRE LENGTH: 6.000 INCHES NOMINAL IN
•
LENGTH: 6.250 INCHES NOMINAL IN
•
STRAND QUANTITY: 1
•
DIAMETER: 0.250 INCHES NOMINAL IN
•
SHAPE: CIRCULAR
•
FEATURES PROVIDED: WIRE
•
AWG SIZE DESIGNATION: 7
•
WIRE/CORD DIAMETER FOR WHICH DESIGNED: 0.018 INCHES IN
TECHNICAL CHARACTERISTICS
WIRE LENGTH6.000 INCHES NOMINAL IN
LENGTH6.250 INCHES NOMINAL IN
STRAND QUANTITY1
DIAMETER0.250 INCHES NOMINAL IN
SHAPECIRCULAR
FEATURES PROVIDEDWIRE
AWG SIZE DESIGNATION7
WIRE/CORD DIAMETER FOR WHICH DESIGNED0.018 INCHES IN
MATERIALLEAD
HOLE QUANTITY1
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
F-2738-A01-2-1-6Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 278663?
278663 is a SEAL,ANTIPILFERAGE.
What parts can replace 278663?
There is 1 known substitute for 278663: F-2738-A01-2-1-6. Substitute compatibility should be verified for your specific system.
What is the NSN for 278663?
278663 is cataloged in the U.S. Government catalog under NSN 5340-01-297-2886. 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.