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3275B — IMPELLER WHEEL,AIRCRAFT COOLING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

3275B: IMPELLER WHEEL,AIRCRAFT COOLING.

IMPELLER WHEEL,AIRCRAFT COOLING. Key specifications include diameter: 2.75 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, attachment_method: BOLT HOLE, part_name_assigned_by_controlling_agency: SQUARE-FLANGE EYEBALL VENT. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-276-0144, 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
3275B
NSN: 5315-00-276-0144
NIINs: 002760144, 017161454
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 830Q4 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION DBA CURTISS-WRIGHT STEAM AND AIR SOLUTIONS DIV STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
diameter2.75 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
attachment_methodBOLT HOLE
mounting_hole_quantity4
part_name_assigned_by_controlling_agencySQUARE-FLANGE EYEBALL VENT
NSN5315-00-276-0144
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3275B · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FIRST END STYLE: SQUARE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
PIN OVERALL DIAMETER: 0.0620 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 2.125 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
MATERIAL: COPPER ALLOY OVERALL
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS
FIRST END STYLESQUARE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-895 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
PIN OVERALL DIAMETER0.0620 INCHES NOMINAL IN
PIN OVERALL LENGTH2.125 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
MATERIALCOPPER ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
157017PC146Reference document
Same NSN cross-reference
Reference document — Secondary reference
157016PC146Reference document
Same NSN cross-reference
Reference document — Secondary reference
156414PC146Reference document
Same NSN cross-reference
Reference document — Secondary reference
157013PC146Reference document
Same NSN cross-reference
Reference document — Secondary reference
157437PC146Reference document
Same NSN cross-reference
Reference document — Secondary reference
157441PC146Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3275B?
3275B is a IMPELLER WHEEL,AIRCRAFT COOLING.
What parts can replace 3275B?
There are 6 known substitutes for 3275B: 157017PC146, 157016PC146, 156414PC146 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3275B?
3275B is cataloged in the U.S. Government catalog under NSN 5315-00-276-0144. 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.