Spur Antibacklash Gear

NSN: 3020-00-020-3904 | Model: 588-3318507-00

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.

NSN Properties and Flags

NATO Stock Number

3020-00-020-3904

DEMIL

Attachment Method

Mounting hole

Pitch Diameter

1.2500 inches

Teeth Quantity

Bore Style

Plain both ends

Mounting Hole Thread Series Designator

Unc transversely through hub, first end

Mounting Hole Thread Size

0.086 inches transversely through hub, first end

Mounting Hole Type And Quantity

2 threaded transversely through hub, first end

Outside Diameter

1.2917 inches

Tooth Form

Standard

Pressure Angle

14.5000 degrees

Distance Between Body Face And Protruding Hub End

0.216 inches first end

Face Width

0.067 inches

Bore Diameter

0.120 inches both ends

Hub Style Designator

1 step first end

End Length

0.166 inches first end

Precision Classification

Quality number 10

End Diameter

0.367 inches first end

First Step Length

0.050 inches first end

First Step Diameter

0.569 inches first end

Distance From End To First Groove

0.594 inches first end

Material

Steel comp 304 teeth

Material Specification

Qq-s-763 federal specification single material response teeth

Surface Treatment

Passivate

Style Designator

Protruding hub

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

NSN 3020-00-020-3904 Datasheet

Supply Class (FSC):

Transmission Chain Sprockets Pulleys Gears

Cross Reference:

588-3318507-00

Cage Codes:

Cmc Electronics Inc (CAGE 90073)

Replacements:

3020-00-020-3904 replaces 3020-00-019-9879

Schedule B & Trade:

Schedule B: 8483409000 (NAICS 333612)

Gears and gearing, other than toothed wheels, chain sprockets and other transmission elements entered separately
SITC: 74840

Gears and gearing; ball screws; gear boxes and other speed changers (including torque converters)
End Use: 21180

Industrial machines, other

Identification:

HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

U - Precious metal content is unknown

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:

NMFC:

197339 - Wheels cog/gear/pinion i/s
WCC:

593 - Motors and parts, (machinery and parts),(less than 35 feet)
SHC:

9 - Other or no special handling required (sh)
ADC:

A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.
LTL:

R - 65.0
ACC:

V - Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing
TCC:

Z - No special type of cargo code applicable

NSN Management Codes:

SOS
Sms
AAC
V
Quantity per pack
1
Unit of Measure
Ea
Shelf Life
N/A
Classification Control
U
MGMT_CTL
Sf9sx-n
Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $1,111.89 to $1,853.15..
Does NSN 3020-00-020-3904 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Air Force, Brazil, Portugal, and Norway
What is the NIIN of NSN 3020-00-020-3904?
000203904 or 00-020-3904
Does NSN 3020-00-020-3904 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 3020-00-020-3904?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1963