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427138 — FAN,AIRCRAFT,MATERI

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

427138: FAN,AIRCRAFT,MATERI.

The FAN,AIRCRAFT,MATERI is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. Key specifications include taper: 3.44088 PER FOOT IN INCHES, material: STEEL COMP 1095 OVERALL, taper_length: 0.750 INCHES NOMINAL IN, overall_width: 0.499 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN, overall_height: 0.438 INCHES NOMINAL IN, overall_length: 1.938 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-391-0598, 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
427138
NSN: 5315-00-391-0598
NIINs: 003910598, 013126982, 013131116, 015193503
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 65282 — WHITE MOTOR CORP (USA)
SPECIFICATIONS
taper3.44088 PER FOOT IN INCHES
materialSTEEL COMP 1095 OVERALL
taper_length0.750 INCHES NOMINAL IN
overall_width0.499 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN
overall_height0.438 INCHES NOMINAL IN
overall_length1.938 INCHES NOMINAL IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
style_designatorTAPERED
key_chamfer_angle45.0 DEGREES NOMINAL
key_chamfer_length0.031 INCHES NOMINAL IN
starting_edge_shapeCHAMFERED
material_document_and_classificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5315-00-391-0598
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 427138 · 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
•
KEY CHAMFER ANGLE: 45.0 DEGREES NOMINAL
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
•
STARTING EDGE SHAPE: CHAMFERED
•
STYLE DESIGNATOR: TAPERED
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.438 INCHES NOMINAL IN
KEY CHAMFER ANGLE45.0 DEGREES NOMINAL
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
STARTING EDGE SHAPECHAMFERED
STYLE DESIGNATORTAPERED
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
OVERALL LENGTH1.938 INCHES NOMINAL IN
OVERALL WIDTH0.499 INCHES MINIMUM AND 0.501 INCHES MAXIMUM IN
KEY CHAMFER LENGTH0.031 INCHES NOMINAL IN
TAPER LENGTH0.750 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
3D2917Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7377638Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 427138?
427138 is a FAN,AIRCRAFT,MATERI.
What parts can replace 427138?
There are 2 known substitutes for 427138: 3D2917, 7377638. Substitute compatibility should be verified for your specific system.
What is the NSN for 427138?
427138 is cataloged in the U.S. Government catalog under NSN 5315-00-391-0598. 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.