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NSN 3020-00-971-2045, 3020009712045
GEAR,ANTIBACKLASH,SPUR

Federal Supply Classification
FSC 3020 - Gears, Pulleys, Sprockets, and Transmission Chain
National Item Identification Number
NIIN 009712045
Codification Country
United States
Item Name Code
INC 26668
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.
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DLMS® Summary

National Stock Number 3020-00-971-2045

National Stock Number (NSN) 3020-00-971-2045, or NIIN 009712045, (gear,antibacklash,spur) was assigned January 1, 1962 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.

There are 3 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 3 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are deemed design controlled or valid supply parts.

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

This NSN is unique to one weapons system.

Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Apr 25, 2008, this NSN's acquisition method was noted as: Suitable for Competitive Acquisition. (Potential sources shall include dealers/distributors.) The annual buy value of this part falls below the screening threshold of $10,000 but it has been screened for known source(s). (NOTE: This code shall not be used when screening parts entering the inventory. It shall not be assigned in preference to or supersede any other AMSC.) Valid AMCs: 1, 2, 3, 4 and 5.

This NSN is assigned to Item Name Code (INC) 26668. [AN ITEM HAVING ONE FIXED GEAR AND ONE FREE GEAR, BOTH HAVING THE SAME COMPLEMENT OF SPUR GEAR TEETH, MOUNTED ON A COMMON HUB. THE FREE GEAR IS ATTACHED TO THE FIXED GEAR BY SPRINGS AND OPERATES AS ONE GEAR. UPON INSTALLATION WITH THE MATING GEAR, THE TEETH OF THE FREE MOVING GEAR ARE PRESET TO MESH WITH TEETH OTHER THAN THOSE OF THE FIXED GEAR. THIS SPRING TENSION BETWEEN THE FIXED GEAR AND THE FREE GEAR ELIMINATES ANY FREE MOTION BETWEEN THE DRIVER AND THE DRIVEN GEAR. THE GEAR IS USED WHERE IDENTICAL AND ACCURATE TRANSMITTED MOTION BETWEEN GEARS IS REQUIRED.]. 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 3020009712045 contains an unknown precious metal.

This NSN is associated to Schedule B 8483409000: gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately. The Schedule B End Use is listed as industrial machines, other. NAICS classification category 333612: speed changer, industrial high-speed drive, and gear manufacturing.

This information was last updated on .


Technical Characteristics

III MATERIAL
(MATT) STEEL COMP 303SE HUB
ATTACHMENT METHOD
(ABSX) CLAMP
BORE NOMINAL DIAMETER
(CWRS) 0.250 INCHES BOTH ENDS
BORE STYLE
(ANTP) PLAIN BOTH ENDS
CLAMPING SURFACE NOMINAL LENGTH
(CWWC) 0.250 INCHES FIRST END
FACE NOMINAL WIDTH
(CWRM) 0.104 INCHES
HUB NOMINAL DIAMETER
(CWTX) 0.313 INCHES FIRST END
HUB STYLE DESIGNATOR
(CWTR) SPLIT FIRST END
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) 66 FED STD SINGLE MATERIAL RESPONSE HUB
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) SAE AA2024 ASSN STD SINGLE MATERIAL RESPONSE FIRST GEAR
MATERIAL DOCUMENT AND CLASSIFICATION
(MDCL) SAE AA2024 ASSN STD SINGLE MATERIAL RESPONSE SECOND GEAR
MATERIAL
(MATT) ALUMINUM ALLOY 2024 FIRST GEAR
MATERIAL
(MATT) ALUMINUM ALLOY 2024 SECOND GEAR
MATERIAL
(MATT) STEEL COMP 303SE HUB
MATERIAL
(MATT) STEEL CORROSION RESISTING SPRING
NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END
(CWQL) 0.281 INCHES FIRST END
NOMINAL OUTSIDE DIAMETER
(CWCD) 2.5417 INCHES
PITCH DIAMETER
(AGJS) 2.5000 INCHES NOMINAL
PRESSURE ANGLE
(CWPP) 20.0000 DEGREES
TOOTH FORM
(CWNH) STANDARD
STYLE DESIGNATOR
(STYL) PROTRUDING HUB
SURFACE TREATMENT
(SFTT) ANODIZE FIRST GEAR
SURFACE TREATMENT
(SFTT) ANODIZE SECOND GEAR
SURFACE TREATMENT
(SFTT) PASSIVATE HUB
TEETH QUANTITY
(AJLA) 120
III MATERIAL
(MATT) STEEL CORROSION RESISTING SPRING
III MATERIAL
(MATT) ALUMINUM ALLOY 2024 FIRST GEAR
III MATERIAL
(MATT) ALUMINUM ALLOY 2024 SECOND GEAR

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