HM025-678-1 — GEAR,SPUR

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

HM025-678-1: GEAR,SPUR.

The GEAR,SPUR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, body_style: PLAIN, SOLID, bore_style: INVOLUTE SPLINE BOTH ENDS, tooth_form: STANDARD, pitch_diameter: 3.6000 INCHES NOMINAL IN, pressure_angle: 20.0000 DEGREES. This part is cataloged in the U.S.

Government catalog under NSN 3020-01-238-8338, 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

HM025-678-1

NSN: 3020-01-238-8338
FSC: 3020 — Gears, Pulleys, Sprockets, and Transmission Chain
CAGE: 1T765 — ROBERTSON FUEL SYSTEMS, L.L.C. (USA)

SPECIFICATIONS

material	STEEL COMP 4140 OVERALL
body_style	PLAIN, SOLID
bore_style	INVOLUTE SPLINE BOTH ENDS
tooth_form	STANDARD
pitch_diameter	3.6000 INCHES NOMINAL IN
pressure_angle	20.0000 DEGREES
teeth_quantity	36
spline_quantity	14 BOTH ENDS
style_designator	PROTRUDING HUBS
surface_treatment	OXIDE OVERALL
face_nominal_width	0.250 INCHES IN
hub_nominal_diameter	0.3125 INCHES BOTH ENDS IN
NSN	3020-01-238-8338

COMPONENT DIAGRAM

KEY FEATURES

•

BORE NOMINAL DIAMETER: 0.644 INCHES BOTH ENDS IN

•

HUB NOMINAL DIAMETER: 0.3125 INCHES BOTH ENDS IN

•

TEETH QUANTITY: 36

•

SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-13924,CLASS 1,BLACK MIL SPEC SINGLE TREATMENT RESPONSE OVERALL

•

BODY STYLE: PLAIN, SOLID

•

BORE STYLE: INVOLUTE SPLINE BOTH ENDS

•

NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END: 0.187 INCHES BOTH ENDS IN

•

STYLE DESIGNATOR: PROTRUDING HUBS

TECHNICAL CHARACTERISTICS

BORE NOMINAL DIAMETER	0.644 INCHES BOTH ENDS IN
HUB NOMINAL DIAMETER	0.3125 INCHES BOTH ENDS IN
TEETH QUANTITY	36
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-C-13924,CLASS 1,BLACK MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
BODY STYLE	PLAIN, SOLID
BORE STYLE	INVOLUTE SPLINE BOTH ENDS
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END	0.187 INCHES BOTH ENDS IN
STYLE DESIGNATOR	PROTRUDING HUBS
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
PITCH DIAMETER	3.6000 INCHES NOMINAL 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.

3020-00-000-0091 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

014222-501Reference document

Same NSN cross-reference

Reference document — Design control — primary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is HM025-678-1?

HM025-678-1 is a GEAR,SPUR.

What parts can replace HM025-678-1?

There is 1 known substitute for HM025-678-1: 014222-501. Substitute compatibility should be verified for your specific system.

What is the NSN for HM025-678-1?

HM025-678-1 is cataloged in the U.S. Government catalog under NSN 3020-01-238-8338. This indicates validated use in U.S. government and defense supply chains.

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HM025-678-1 — GEAR,SPUR

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