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203406 — SCROLL HOUSING,AIRCRAFT COOLING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

203406: SCROLL HOUSING,AIRCRAFT COOLING.

SCROLL HOUSING,AIRCRAFT COOLING. Key specifications include special_features: STEEL PER QQ-S-633; INCLUDES SHROUD AND INLET. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-211-9804, 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
203406
NSN: 5305-00-211-9804
NIINs: 002119804, 009560123
FSC: 5305 — Screws
CAGE: 06853 — BENDIX COMMERCIAL VEHICLE SYSTEMS LLC DBA BENDIX COMMERCIAL VEHICLE SYSTEMS (USA)
SPECIFICATIONS
special_featuresSTEEL PER QQ-S-633; INCLUDES SHROUD AND INLET
NSN5305-00-211-9804
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 203406 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HEAD HEIGHT: 0.155 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
•
SCREW SURFACE TREATMENT: CADMIUM AND ZINC
•
FASTENER LENGTH: 0.590 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.490 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
HEAD STYLE: FILLISTER
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW MATERIAL: STEEL
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.155 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
SCREW SURFACE TREATMENTCADMIUM AND ZINC
FASTENER LENGTH0.590 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
THREAD LENGTH0.490 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
HEAD STYLEFILLISTER
THREAD DIRECTIONRIGHT-HAND
SCREW MATERIALSTEEL
INTERNAL DRIVE STYLESLOT
THREAD CLASS2A A
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 203406?
203406 is a SCROLL HOUSING,AIRCRAFT COOLING.
What is the NSN for 203406?
203406 is cataloged in the U.S. Government catalog under NSN 5305-00-211-9804. 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.