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103-3278-1 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

103-3278-1: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 3.260 INCHES NOMINAL IN, length: 11.260 INCHES NOMINAL IN, unit_type: PROTECTIVE TUBE, corner_radius: 0.500 INCHES NOMINAL IN, immersion_length: 6.500 INCHES NOMINAL IN, peripheral_shape_style: RECTANGLE, MULTI HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-278-2552, 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
103-3278-1
NSN: 5340-01-278-2552
NIINs: 012782552, 012925170
FSC: 5340 — Hardware, Commercial
CAGE: 3B150 — RAYTHEON COMPANY DBA RAYTHEON CO (USA)
SPECIFICATIONS
width3.260 INCHES NOMINAL IN
length11.260 INCHES NOMINAL IN
unit_typePROTECTIVE TUBE
corner_radius0.500 INCHES NOMINAL IN
immersion_length6.500 INCHES NOMINAL IN
peripheral_shape_styleRECTANGLE, MULTI HOLES
end_item_identification4920-00-505-8807
hole_quantity_along_width1
hole_quantity_along_length4
NSN5340-01-278-2552
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 103-3278-1 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
•
CORNER RADIUS: 0.500 INCHES NOMINAL IN
•
LENGTH: 11.260 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 4
•
HOLE QUANTITY ALONG WIDTH: 1
•
PERIPHERAL SHAPE STYLE: RECTANGLE, MULTI HOLES
•
WIDTH: 3.260 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
CORNER RADIUS0.500 INCHES NOMINAL IN
LENGTH11.260 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH4
HOLE QUANTITY ALONG WIDTH1
PERIPHERAL SHAPE STYLERECTANGLE, MULTI HOLES
WIDTH3.260 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 103-3278-1?
103-3278-1 is a COVER,ACCESS.
What is the NSN for 103-3278-1?
103-3278-1 is cataloged in the U.S. Government catalog under NSN 5340-01-278-2552. 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.