NA 20B-1/2 — GEAR,SPUR

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

NA 20B-1/2: GEAR,SPUR.

The GEAR,SPUR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, body_style: PLAIN, SOLID, bore_style: W/ KEYWAY BOTH ENDS, pitch_diameter: 1.0000 INCHES NOMINAL IN, pressure_angle: 14.3000 DEGREES, teeth_quantity: 20. This part is cataloged in the U.S.

Government catalog under NSN 3020-01-436-9526, 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

NA 20B-1/2

NSN: 3020-01-436-9526
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 71041 — ALTRA INDUSTRIAL MOTION CORP. (USA)

SPECIFICATIONS

material	STEEL OVERALL
body_style	PLAIN, SOLID
bore_style	W/ KEYWAY BOTH ENDS
pitch_diameter	1.0000 INCHES NOMINAL IN
pressure_angle	14.3000 DEGREES
teeth_quantity	20
special_features	USED ON ANCHOR HOUSED AND ANCHOR CHAIN INDICATOR ASSEMBLY, 6405752, ELECTRIC BOAT INC.
style_designator	PROTRUDING HUB
face_nominal_width	0.375 INCHES IN
hub_nominal_diameter	0.844 INCHES SECOND END IN
hub_style_designator	PLAIN SECOND END
keyway_nominal_width	0.126 INCHES BOTH ENDS IN
NSN	3020-01-436-9526

COMPONENT DIAGRAM

KEY FEATURES

•

KEYWAY NOMINAL WIDTH: 0.126 INCHES BOTH ENDS IN

•

BORE NOMINAL DIAMETER: 0.500 INCHES BOTH ENDS IN

•

HUB NOMINAL DIAMETER: 0.844 INCHES SECOND END IN

•

TEETH QUANTITY: 20

•

BODY STYLE: PLAIN, SOLID

•

BORE STYLE: W/ KEYWAY BOTH ENDS

•

NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END: 0.375 INCHES SECOND END IN

•

STYLE DESIGNATOR: PROTRUDING HUB

TECHNICAL CHARACTERISTICS

KEYWAY NOMINAL WIDTH	0.126 INCHES BOTH ENDS IN
BORE NOMINAL DIAMETER	0.500 INCHES BOTH ENDS IN
HUB NOMINAL DIAMETER	0.844 INCHES SECOND END IN
TEETH QUANTITY	20
BODY STYLE	PLAIN, SOLID
BORE STYLE	W/ KEYWAY BOTH ENDS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	0.375 INCHES SECOND END IN
STYLE DESIGNATOR	PROTRUDING HUB
PITCH DIAMETER	1.0000 INCHES NOMINAL IN
HUB STYLE DESIGNATOR	PLAIN SECOND END

OTHER ITEMS IN FSC 3020 — Gears, Pulleys, Sprockets, and Transmission Chain

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

3020-00-000-0091 3020-00-001-0027 3020-00-001-0028 3020-00-001-0063 3020-00-001-0064 3020-00-001-0066 3020-00-001-0071 3020-00-001-0072

SUBSTITUTES & CROSS-REFERENCES 3

581-6405752-B5Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

218016796Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

581-6405752 FIND AHNA-B5Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 NA 20B-1/2?

NA 20B-1/2 is a GEAR,SPUR.

What parts can replace NA 20B-1/2?

There are 3 known substitutes for NA 20B-1/2: 581-6405752-B5, 218016796, 581-6405752 FIND AHNA-B5. Substitute compatibility should be verified for your specific system.

What is the NSN for NA 20B-1/2?

NA 20B-1/2 is cataloged in the U.S. Government catalog under NSN 3020-01-436-9526. This indicates validated use in U.S. government and defense supply chains.

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