NSN 3020-00-477-1804 NIIN 004771804 — Antibacklash Spur Gear

NSN
Item Name
Assigned
DEMIL
Shelf Life
UOM
Using Services
NSN:
3020-00-477-1804
3020004771804
Description:
GEAR,ANTIBACKLASH,SPUR
NSN Assigned:
14-JUN-71
DEMIL:
NO
Shelf Life:
N/A
UOM:
--
Using Services:
--

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Quality Commitment

Serving our customers with quality and safety first.

  •   AS9120 Certified
  •   Audited supply chain
  •   ITAR Registered
  •   DDTC Registered
  •   HAZMAT Certified
  •   Customer service objectives
  •   Every product 100% inspected
AS9120 Certified by SAI Global

3020-00-477-1804 Specification Set by the OEM (see RNCC code 3)

Attachment Method ABSX:

mounting hole

Pitch Diameter AGJS:

0.9375in.

Teeth Quantity AJLA:

60

Bore Style ANTP:

plain both ends

Nominal Outside Diameter CWCD:

0.9688in.

Nominal Overall Length CWFR:

0.375in.

Tooth Form CWNH:

standard

Pressure Angle CWPP:

20.0000 degrees

Nominal Distance Between Body Face And Protruding Hub End CWQL:

0.250in. first end

Face Nominal Width CWRM:

0.125in.

Bore Nominal Diameter CWRS:

0.187in. both ends

Hub Style Designator CWTR:

pinned first end

Hub Nominal Diameter CWTX:

0.375in. first end

Precision Classification CWWK:

quality number 10 or quality number 11

Special Features FEAT:

two threaded mtg holes located hub between hub end and gear face 90 deg apart; unc thd series; mtg hole nom thd size 0.112 in.; 40 threads per in.

Material MATT:

steel hub

Surface Treatment SFTT:

passivate hub

Style Designator STYL:

protruding hub

Cross Reference Parts Part numbers that meet the specification outlined on this page and set by the OEM

Part Number
Cage
RNCC
RNVC
DAC
RNAAC
Status
MSDS
SADC
Part Number:
20178-2
Cage Code:
14632
RNCC:
3
RNVC:
2
DAC:
2
RNAAC:
SJ
Status:
A
MSDS:
SADC:
Part Number:
MAB250-60-1875
Cage Code:
01351
RNCC:
3
RNVC:
2
DAC:
4
RNAAC:
AX
Status:
A
MSDS:
SADC:

Identification Item Identification Guide (IIG) and Item Name Code (INC)

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
26668
FIIG:
A27300
Concept No.:
App. Key:
AC
Cond. Code:
1
Status:
A
STYLE DESIGNATOR PROTRUDING HUB style nsn 3020-00-477-1804
STYLE DESIGNATOR PROTRUDING HUB style nsn 3020-00-477-1804

Definition Definition of approved item name (AIN): "GEAR,ANTIBACKLASH,SPUR"

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.

3020-00-477-1804 Material Hazmat, Precious Metals, Criticality, Enviroment, and ESD

HMIC
PMIC
ESD
ENAC
ADPE
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
ADPE:
CRITL:
X
Hazmat (HMIC) N

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

Precious Metals (PMIC) U

Precious metal content is unknown

Criticality X

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

  Identification Codes

HMIC: Hazardous Material Indicator Code. A one position code that identifies a hazardous item.

PMIC: Precious Metal Indicator Code. A one position code which identifies items that have precious metals as part of their content. precious metals are those metals generally considered to be uncommon, highly valuable, and relatively superior in certain properties such as resistance to corrosion and electrical conductivity.

ESD: Electrostatic Discharge. Indicates if an item is susceptible to electrostatic discharge or electromagnetic interference damage. electrostatic discharge damage occurs when an accumulation of static electricity generated by the relative motion or separation of materials is released to another item by direct contact. electromagnetic interference damage occurs when an item comes into proximity with an electrostatic or magnetic field.

ENAC: Enviromental Attribute Code. Identifies items with environmentally preferred characteristics.

CRITL: Criticality Indicator Code. Indicates an item is technically critical by tolerance, fit, application, nuclear hardness properties, or other characteristics.