RC-8421 — GEAR,HELICAL

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

RC-8421: GEAR,HELICAL.

The GEAR,HELICAL is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, body_style: WEBBED, WITH LIGHTENING HOLES, bore_style: W/COUNTERBORE COUNTERBORE FIRST END, teeth_type: SINGLE HELIX, helix_angle: 16.5000 DEGREES, pitch_diameter: 19.5550 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3020-01-194-2132, 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

RC-8421

NSN: 3020-01-194-2132
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 55102 — CONTINENTAL EMSCO CO SKAGIT PRODUCTS DIV (USA)

SPECIFICATIONS

material	STEEL OVERALL
body_style	WEBBED, WITH LIGHTENING HOLES
bore_style	W/COUNTERBORE COUNTERBORE FIRST END
teeth_type	SINGLE HELIX
helix_angle	16.5000 DEGREES
pitch_diameter	19.5550 INCHES NOMINAL IN
pressure_angle	20.0000 DEGREES
teeth_quantity	75
tooth_direction	RIGHT
style_designator	HUBLESS
face_nominal_width	3.375 INCHES IN
keyway_nominal_width	0.750 INCHES BOTH ENDS IN
NSN	3020-01-194-2132

COMPONENT DIAGRAM

KEY FEATURES

•

KEYWAY NOMINAL WIDTH: 0.750 INCHES BOTH ENDS IN

•

BORE NOMINAL DIAMETER: 3.500 INCHES BOTH ENDS IN

•

HELIX ANGLE: 16.5000 DEGREES

•

TEETH QUANTITY: 75

•

BODY STYLE: WEBBED, WITH LIGHTENING HOLES

•

COUNTERBORE NOMINAL DIAMETER: 4.001 INCHES COUNTERBORE FIRST END IN

•

TOOTH DIRECTION: RIGHT

•

BORE STYLE: W/COUNTERBORE COUNTERBORE FIRST END

TECHNICAL CHARACTERISTICS

KEYWAY NOMINAL WIDTH	0.750 INCHES BOTH ENDS IN
BORE NOMINAL DIAMETER	3.500 INCHES BOTH ENDS IN
HELIX ANGLE	16.5000 DEGREES
TEETH QUANTITY	75
BODY STYLE	WEBBED, WITH LIGHTENING HOLES
COUNTERBORE NOMINAL DIAMETER	4.001 INCHES COUNTERBORE FIRST END IN
TOOTH DIRECTION	RIGHT
BORE STYLE	W/COUNTERBORE COUNTERBORE FIRST END
BORE STYLE	W/ KEYWAY BOTH ENDS
TEETH TYPE	SINGLE HELIX

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 1

51863H PIECE 19Same 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 RC-8421?

RC-8421 is a GEAR,HELICAL.

What parts can replace RC-8421?

There is 1 known substitute for RC-8421: 51863H PIECE 19. Substitute compatibility should be verified for your specific system.

What is the NSN for RC-8421?

RC-8421 is cataloged in the U.S. Government catalog under NSN 3020-01-194-2132. This indicates validated use in U.S. government and defense supply chains.

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RC-8421 — GEAR,HELICAL

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