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Technical Data Sheet
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278-381 — PLATE,RETAINING,SHAFT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

278-381: PLATE,RETAINING,SHAFT.

The PLATE,RETAINING,SHAFT is a the manufacturer industrial component. Key specifications include shape: ROUND, material: ALUMINUM ALLOY, thickness: 0.051 INCHES NOMINAL IN, outside_diameter: 8.957 INCHES NOMINAL IN, special_features: MTG HOLE SPACING: EQUALLY SPACED ON 3.937 IN. DIA BOLT CIRCLE IN, aperture_diameter: 3.188 INCHES NOMINAL IN.

This part is cataloged in the U.S. Government catalog under NSN 3040-00-397-4753, 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
278-381
NSN: 3040-00-397-4753
FSC: 3040 — Miscellaneous Power Transmission Equipment
CAGE: 7EK50 — TEXTRON AVIATION INC (USA)
SPECIFICATIONS
shapeROUND
materialALUMINUM ALLOY
thickness0.051 INCHES NOMINAL IN
outside_diameter8.957 INCHES NOMINAL IN
special_featuresMTG HOLE SPACING: EQUALLY SPACED ON 3.937 IN. DIA BOLT CIRCLE IN
aperture_diameter3.188 INCHES NOMINAL IN
mounting_hole_diameter0.257 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
mounting_hole_quantity6
NSN3040-00-397-4753
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available PLATE,RETAINING,SHAFT TITLE COMPONENT PN 278-381 MFR PLATE,RETAINING,SHAFT
KEY FEATURES
•
MOUNTING HOLE QUANTITY: 6
•
MOUNTING HOLE DIAMETER: 0.257 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
•
SHAPE: ROUND
•
OUTSIDE DIAMETER: 8.957 INCHES NOMINAL IN
•
APERTURE DIAMETER: 3.188 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY
•
THICKNESS: 0.051 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY6
MOUNTING HOLE DIAMETER0.257 INCHES MINIMUM AND 0.267 INCHES MAXIMUM IN
SHAPEROUND
OUTSIDE DIAMETER8.957 INCHES NOMINAL IN
APERTURE DIAMETER3.188 INCHES NOMINAL IN
SPECIAL FEATURESMTG HOLE SPACING: EQUALLY SPACED ON 3.937 IN. DIA BOLT CIRCLE IN
MATERIALALUMINUM ALLOY
THICKNESS0.051 INCHES NOMINAL IN
OTHER ITEMS IN FSC 3040 — Miscellaneous Power Transmission Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3040-00-001-0046 3040-00-001-0047 3040-00-001-0048 3040-00-001-0068 3040-00-001-0077 3040-00-001-0078 3040-00-001-0089 3040-00-001-1224
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 278-381?
278-381 is a PLATE,RETAINING,SHAFT.
What is the NSN for 278-381?
278-381 is cataloged in the U.S. Government catalog under NSN 3040-00-397-4753. 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.