NSN 3040-00-740-2077, 3040007402077
GEARSHAFT,HELICAL

Federal Supply Classification: FSC 3040 - Miscellaneous Power Transmission Equipment
National Item Identification Number: NIIN 007402077
Codification Country: United States
Item Name Code: INC 60539
Criticality: (X) This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Hazardous Material Indicator Code: (N) There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials.

Availability: Readily Available Qualified Suppliers: We have 1 qualified suppliers

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DLMS^® Summary

National Stock Number 3040-00-740-2077

National Stock Number (NSN) 3040-00-740-2077, or NIIN 007402077, (gearshaft,helical) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 2 manufacturer part numbers associated with this NSN. None of the associated part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, there are no suppliers that are deemed design controlled or valid supply parts. ISO Group has several sources of supply for this NSN.

This part number has not been procured by the US Government in over 5 years.

This NSN is assigned to Item Name Code (INC) 60539. [A GEARSHAFT WITH A SINGLE COMPLEMENT OF HELICAL GEAR TEETH. FOR ITEMS WITH MORE THAN ONE COMPLEMENT OF TEETH, SEE GEARSHAFT (1), MULTIPLE GEARS.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. NSN 3040007402077 does not contain precious metals.

This NSN is associated to Schedule B 8483105000: transmission shafts and cranks, except camshafts and crankshafts. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 333613: mechanical power transmission equipment manufacturing.

This information was last updated on Aug 01, 2025.

Technical Characteristics

SPECIAL FEATURES: (FEAT) STEEL GEAR,SAE 1141 OR AISI 1144,STEEL SHAFT, 1.656 IN. O/A LG OF SHAFT,0.401 IN. MIN,0.411 IN. MAX LG OF END OF SHAFT,0.3120 IN. MIN,0.3125 IN. MAX DIA END THD,5/16-24 NF THD,0.250 IN. LG OF THD,0.4355 IN. MIN,0.436 IN. MAX OD OF SHAFT,GEAR DATA,GEAR LOCATED ON UNTHD END OF SHAFT,1.495 IN. MIN,1.496 IN. MAX OD OF GEAR,1.2565 IN. PITCH DIA,10 TEETH,25 DEG PRESSURE ANGLE,5 DEG 50 MIN HELIX ANGLE,LH THD,0.39270 IN. CIRCULAR PITCH,0.464 IN. MIN,0.465 IN. MAX W OF FACE,0.4335 IN. MIN,0.4345 IN. MAX DIA OF BORE,0.464 IN. MIN,0.465 IN. MAX LG OF BORE