139C7937 — GEAR,ANTIBACKLASH,SPUR

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

139C7937: GEAR,ANTIBACKLASH,SPUR.

The GEAR,ANTIBACKLASH,SPUR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 HUB, bore_style: PLAIN BOTH ENDS, tooth_form: STANDARD, pitch_diameter: 2.2990 INCHES MINIMUM AND 2.3000 INCHES MAXIMUM IN, pressure_angle: 20.0000 DEGREES, teeth_quantity: 23. This part is cataloged in the U.S.

Government catalog under NSN 3020-00-547-0776, 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

139C7937

NSN: 3020-00-547-0776
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 05606 — GENERAL DYNAMICS-OTS, INC. DIV ORDNANCE AND TACTICAL SYSTEMS (USA)

SPECIFICATIONS

material	STEEL COMP 303 HUB
bore_style	PLAIN BOTH ENDS
tooth_form	STANDARD
pitch_diameter	2.2990 INCHES MINIMUM AND 2.3000 INCHES MAXIMUM IN
pressure_angle	20.0000 DEGREES
teeth_quantity	23
style_designator	PROTRUDING HUB
face_nominal_width	0.300 INCHES IN
hub_nominal_diameter	0.630 INCHES FIRST END IN
hub_style_designator	PINNED FIRST END
bore_nominal_diameter	0.250 INCHES BOTH ENDS IN
nominal_overall_length	0.640 INCHES IN
NSN	3020-00-547-0776

COMPONENT DIAGRAM

KEY FEATURES

•

BORE NOMINAL DIAMETER: 0.250 INCHES BOTH ENDS IN

•

HUB NOMINAL DIAMETER: 0.630 INCHES FIRST END IN

•

TEETH QUANTITY: 23

•

BORE STYLE: PLAIN BOTH ENDS

•

PRECISION CLASSIFICATION: QUALITY NUMBER 10

•

NOMINAL OVERALL LENGTH: 0.640 INCHES IN

•

STYLE DESIGNATOR: PROTRUDING HUB

•

MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB

TECHNICAL CHARACTERISTICS

BORE NOMINAL DIAMETER	0.250 INCHES BOTH ENDS IN
HUB NOMINAL DIAMETER	0.630 INCHES FIRST END IN
TEETH QUANTITY	23
BORE STYLE	PLAIN BOTH ENDS
PRECISION CLASSIFICATION	QUALITY NUMBER 10
NOMINAL OVERALL LENGTH	0.640 INCHES IN
STYLE DESIGNATOR	PROTRUDING HUB
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE HUB
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE BODY
PITCH DIAMETER	2.2990 INCHES MINIMUM AND 2.3000 INCHES MAXIMUM IN

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.

3020-00-001-2090 3020-00-001-4468 3020-00-007-2779 3020-00-009-4033 3020-00-031-2269 3020-00-146-4181 3020-00-146-4222 3020-00-425-7115

SUBSTITUTES & CROSS-REFERENCES 2

SGM031694002Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

A141-2-1Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Demilitarization required — critical (Q)

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FREQUENTLY ASKED QUESTIONS

What is 139C7937?

139C7937 is a GEAR,ANTIBACKLASH,SPUR.

What parts can replace 139C7937?

There are 2 known substitutes for 139C7937: SGM031694002, A141-2-1. Substitute compatibility should be verified for your specific system.

What is the NSN for 139C7937?

139C7937 is cataloged in the U.S. Government catalog under NSN 3020-00-547-0776. This indicates validated use in U.S. government and defense supply chains.

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139C7937 — GEAR,ANTIBACKLASH,SPUR

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