NSN 3020-00-771-0598 VCAA103PRECISI0N, 9174827, 00-771-0598
Product Details | SPUR ANTIBACKLASH GEAR
3020-00-771-0598 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.
Part Alternates: VCAA103PRECISI0N, 9174827, 3020-00-771-0598, 00-771-0598, 3020007710598, 007710598
Mechanical Power Transmission Equipment | Gears, Pulleys, Sprockets, and Transmission Chain
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 30 | 01 JAN 1962 | 00-771-0598 | 26668 ( GEAR, ANTIBACKLASH, SPUR ) |
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Technical Data | NSN 3020-00-771-0598
| Characteristic | Specifications |
|---|---|
| MATERIAL | ALUMINUM ALLOY BODY ALUMINUM ALLOY HUB |
| SURFACE TREATMENT | ANODIZE OVERALL |
| TEETH QUANTITY | 123 |
| TOOTH FORM | STANDARD |
| PRESSURE ANGLE | 20.0000 DEGREES |
| PRECISION CLASSIFICATION | QUALITY NUMBER 10 |
| BACKLASH DESIGNATION | GRADE C |
| STYLE DESIGNATOR | 4 PROTRUDING HUBS |
| PITCH DIAMETER | 1.9218 INCHES NOMINAL |
| NOMINAL OVERALL LENGTH | 0.578 INCHES |
| NOMINAL OUTSIDE DIAMETER | 1.952 INCHES |
| FACE NOMINAL WIDTH | 0.114 INCHES |
| NOMINAL DISTANCE BETWEEN BODY FACE AND PROTRUDING HUB END | 0.427 INCHES FIRST END 0.037 INCHES SECOND END |
| BORE STYLE | 1 PLAIN BOTH ENDS |
| BORE NOMINAL DIAMETER | 0.250 INCHES BOTH ENDS |
| HUB STYLE DESIGNATOR | 4C 3 STEPS FIRST END 1 PLAIN SECOND END |
| HUB NOMINAL DIAMETER | 0.813 INCHES SECOND END |
| END NOMINAL LENGTH | 0.046 INCHES FIRST END |
| END NOMINAL DIAMETER | 0.748 INCHES FIRST END |
| FIRST STEP NOMINAL LENGTH | 0.047 INCHES FIRST END |
| FIRST STEP NOMINAL DIAMETER | 1.000 INCHES FIRST END |
| SECOND STEP NOMINAL LENGTH | 0.297 INCHES FIRST END |
| SECOND STEP NOMINAL DIAMETER | 0.748 INCHES FIRST END |
| THIRD STEP NOMINAL LENGTH | 0.037 INCHES FIRST END |
| THIRD STEP NOMINAL DIAMETER | 1.000 INCHES FIRST END |
| FIRST GROOVE NOMINAL WIDTH | 0.270 INCHES FIRST END |
| FIRST GROOVE NOMINAL DIAMETER | 0.747 INCHES FIRST END |
| NOMINAL DISTANCE FROM END TO FIRST GROOVE | 0.093 INCHES FIRST END |
| ATTACHMENT METHOD | MOUNTING HOLE |
| MOUNTING HOLE TYPE AND QUANTITY | 2 THREADED TRANSVERSELY THROUGH HUB, FIRST END |
| MOUNTING HOLE THREAD SERIES DESIGNATOR | UNC TRANSVERSELY THROUGH HUB, FIRST END |
| MOUNTING HOLE NOMINAL THREAD SIZE | 0.138 INCHES TRANSVERSELY THROUGH HUB, FIRST END |
| MOUNTING HOLE THREAD QUANTITY PER INCH | 32 TRANSVERSELY THROUGH HUB, FIRST END |
| SPECIAL FEATURES | MTG HOLES 90 DEGS APART |
Restrictions/Controls & Freight Information | NSN 3020-00-771-0598
| Category | Code | Description |
|---|---|---|
| Shelf-Life Code: | 0 | Nondeteriorative |
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Demilitarization Code: | B | Munitions List Item - Mutilation (MUT) to the point of scrap required. (Formerly: Demilitarization not required. Trade Security Controls (TSCs) required at disposition.) |
| Controlled Inventory Item Code: | U | UNCLASSIFIED |
| Precious Metals Indicator Code: | U | Precious metal type is unknown |
| Criticality Code: | X | The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. |
| Category | Code | Description |
|---|---|---|
| NMF Description | 197339 | WHEELS COG/GEAR/PINION I/S |
| Less than car load rating | ||
| Less than truck load rating | R | 65.0 |
| Water commodity Code | 586 | unknown |
| Originating Activity Code | XX | |
| Air Dimension Code | A | Shipment is not a consolidation and does not exceed 72 inches in any dimension. |
| Air Commodity | V | Vehicles, machinery, shop and warehouse equipment and supplies, including special tools and equipment, ground servicing and special purpose vehicles, marine equipment and supplies, repair and maintenance parts for the above. |
| Air Special Handling | Z | No special handling required. |
| Special Handling Code | 9 | unknonwn |
| HAZMAT | ||
| Type of Cargo | Z | No special type of cargo code applicable |
Management | NSN 3020-00-771-0598
| Category | Code | Description |
|---|---|---|
| Materiel Category and Inventory Manager | J | Ground Forces Support Materiel (DLA/GSA Items) |
| Appropriation and Budget Activity | 2 | Stock Fund Secondary Items |
| Management Inventory Segment | 2 | NONREPARABLE ITEMS (Exclusive of Insurance and Provisioning Items). This code will be used to identify items which are not reparable. |
| Specific Group/Generic Code | 0 | Medical Materiel |
| Weapons Systems/End Item or Homogeneous Group | 00 | DLA/GSA-Managed Items that cannot be identified to a specific Army Weapons Systems/End Item |
| Accounting Requirements Code | X | Expendable item. An item of Army property coded with an ARC of ?X? in the AMDF. Expendable items require no formal accountability after issue from a stock record account. Commercial and fabricated items similar to items coded ?X? in the AMDF are considered expendable items. |
| Source of Supply | SMS | Defense Logistics Agency Enterprise Business Systems |
| Agency | DA | Department of the Army |
| Service Organization | A | U.S. Army |
| Reparability | Z | This is a nonreparable item. If condemned or economically unserviceable, then dispose at the level authorized replace the item. |
| Acquisition Advice Codes | V | TERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable. |
| Controlled Item Code | U | UNCLASSIFIED |
| Shelf Life Code | 0 | Nondeteriorative |
| Purchasing | QTY UOM |
1 EA : Each |
| Category | Code | Description |
|---|---|---|
| Stores Account Code | 1 | Marine Corps Stock Fund Account Item. |
| Combat Essentiality Code | 5 | Critical Repair Part to a Combat Essential End Item. Those parts or components whose failure in a combat essential end item will render the end item inoperative or reduce its effectiveness below the minimum acceptable level of efficiency. |
| Materiel Management Code | B | All CommoditiesDefense Logistics Agency, (DLA,) |
| Echelon Management Code | 2 | ICP/DSSC Marine Corps-managed Recoverability Code D items and Defense Logistics Agency (DLA)/TACOM/GSA) items which the integrated manager has not decontrolled. |
| Source of Supply | SMS | Defense Logistics Agency Enterprise Business Systems |
| Agency | DM | U.S. Marine Corps |
| Service Organization | M | U.S. Marine Corps |
| Reparability | Z | Nonreparable item. When unserviceable, condemn and dispose at the level indicated by the first digit of the maintenance code. |
| Acquisition Advice Codes | V | TERMINAL ITEM # Identifies items in stock, but future procurement is not authorized. Requisitions may continue to be submitted until stocks are exhausted. Preferred item National Stock Number is normally provided by application of the phrase: When Exhausted Use (NSN). Requisitions will be submitted in accordance with IMM/Service requisitioning procedures as applicable. |
| Controlled Item Code | U | UNCLASSIFIED |
| Shelf Life Code | 0 | Nondeteriorative |
| Purchasing | QTY UOM |
1 EA : Each |



