TB-221-4 — IMPELLER,FAN,AXIAL

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

TB-221-4: IMPELLER,FAN,AXIAL.

The IMPELLER,FAN,AXIAL is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. Key specifications include diameter: 2.031 INCHES NOMINAL IN, material: ALUMINUM ALLOY OVERALL, hub_location: BACK, special_features: ONE SETSCREW NO. 10-32 NF, style_designator: ROUNDED TIP, attachment_method: SETSCREW.

This part is cataloged in the U.S. Government catalog under NSN 4140-00-508-0875, 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

TB-221-4

NSN: 4140-00-508-0875
FSC: 4140 — Fans, Air Circulators, and Blower Equipment
CAGE: 0AUZ4 — DACK BLOWER MFG INC (USA)

SPECIFICATIONS

diameter	2.031 INCHES NOMINAL IN
material	ALUMINUM ALLOY OVERALL
hub_location	BACK
blade_quantity	4
special_features	ONE SETSCREW NO. 10-32 NF
style_designator	ROUNDED TIP
attachment_method	SETSCREW
rotation_direction_for_which_designed	COUNTERCLOCKWISE
NSN	4140-00-508-0875

COMPONENT DIAGRAM

KEY FEATURES

•

STYLE DESIGNATOR: ROUNDED TIP

•

ATTACHMENT METHOD: SETSCREW

•

DIAMETER: 2.031 INCHES NOMINAL IN

•

BLADE QUANTITY: 4

•

HUB LOCATION: BACK

•

MATERIAL: ALUMINUM ALLOY OVERALL

•

ROTATION DIRECTION FOR WHICH DESIGNED: COUNTERCLOCKWISE

TYPICAL APPLICATIONS

Server thermal management and cooling
Hot-swap fan replacement in production environments
Redundant cooling for high-availability systems

TECHNICAL CHARACTERISTICS

STYLE DESIGNATOR	ROUNDED TIP
ATTACHMENT METHOD	SETSCREW
DIAMETER	2.031 INCHES NOMINAL IN
BLADE QUANTITY	4
HUB LOCATION	BACK
SPECIAL FEATURES	ONE SETSCREW NO. 10-32 NF
MATERIAL	ALUMINUM ALLOY OVERALL
ROTATION DIRECTION FOR WHICH DESIGNED	COUNTERCLOCKWISE

SUBSTITUTES & CROSS-REFERENCES 2

0-221-4Reference document

Same NSN cross-reference

Reference document — Secondary reference

7730390P2Reference 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 TB-221-4?

TB-221-4 is a IMPELLER,FAN,AXIAL.

What parts can replace TB-221-4?

There are 2 known substitutes for TB-221-4: 0-221-4, 7730390P2. Substitute compatibility should be verified for your specific system.

What is the NSN for TB-221-4?

TB-221-4 is cataloged in the U.S. Government catalog under NSN 4140-00-508-0875. This indicates validated use in U.S. government and defense supply chains.

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