138C518 — GEAR,SPUR

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

138C518: GEAR,SPUR.

The GEAR,SPUR is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, body_style: PLAIN, SOLID, bore_style: PLAIN BOTH ENDS, pitch_diameter: 1.7500 INCHES NOMINAL IN, pressure_angle: 20.0000 DEGREES, teeth_quantity: 42. This part is cataloged in the U.S.

Government catalog under NSN 3020-01-322-2140, 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

138C518

NSN: 3020-01-322-2140
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 97942 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP (USA)

SPECIFICATIONS

material	STEEL CORROSION RESISTING OVERALL
body_style	PLAIN, SOLID
bore_style	PLAIN BOTH ENDS
pitch_diameter	1.7500 INCHES NOMINAL IN
pressure_angle	20.0000 DEGREES
teeth_quantity	42
style_designator	PROTRUDING HUB
attachment_method	CLAMP
surface_treatment	PASSIVATE OVERALL
face_nominal_width	0.125 INCHES IN
hub_nominal_diameter	0.312 INCHES FIRST END IN
hub_style_designator	SPLIT FIRST END
NSN	3020-01-322-2140

COMPONENT DIAGRAM

KEY FEATURES

•

BORE NOMINAL DIAMETER: 0.250 INCHES BOTH ENDS IN

•

HUB NOMINAL DIAMETER: 0.312 INCHES FIRST END IN

•

TEETH QUANTITY: 42

•

CLAMPING SURFACE NOMINAL LENGTH: 0.250 INCHES FIRST END IN

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35,TYPE 11 FED SPEC SINGLE TREATMENT RESPONSE OVERALL

•

BODY STYLE: PLAIN, SOLID

•

BORE STYLE: PLAIN BOTH ENDS

•

NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END: 0.281 INCHES FIRST END IN

TECHNICAL CHARACTERISTICS

BORE NOMINAL DIAMETER	0.250 INCHES BOTH ENDS IN
HUB NOMINAL DIAMETER	0.312 INCHES FIRST END IN
TEETH QUANTITY	42
CLAMPING SURFACE NOMINAL LENGTH	0.250 INCHES FIRST END IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35,TYPE 11 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
BODY STYLE	PLAIN, SOLID
BORE STYLE	PLAIN BOTH ENDS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	0.281 INCHES FIRST END IN
STYLE DESIGNATOR	PROTRUDING HUB
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL

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 4

DH23T42Reference document

Same NSN cross-reference

Reference document — Secondary reference

H23-42Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

138C518H01Reference document

Same NSN cross-reference

Reference document — Secondary reference

C24S18-42Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — critical (Q)

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FREQUENTLY ASKED QUESTIONS

What is 138C518?

138C518 is a GEAR,SPUR.

What parts can replace 138C518?

There are 4 known substitutes for 138C518: DH23T42, H23-42, 138C518H01 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 138C518?

138C518 is cataloged in the U.S. Government catalog under NSN 3020-01-322-2140. This indicates validated use in U.S. government and defense supply chains.

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