The Gear,spur, cataloged under National Stock Number 3020-00-385-7768, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 26 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-385-7768 |
| Primary Part Number | 7188238 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.3745 INCHES SECOND END IN |
| Hub Nominal Diameter | 3.000 INCHES SECOND END IN |
| Backlash Designation | GRADE C |
| Teeth Quantity | 60 |
| Surface Treatment Document and Classification | MIL-C-13924,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Bore Style | TAPERED W/KEYWAY SECOND END |
| Mounting Hole Type and Quantity | 2 THREADED AXIALLY THROUGH BODY FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 4.0625 INCHES SECOND END IN |
| Precision Classification | QUALITY NUMBER 6 |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | BELL SHAPE BODY, PROTRUDING HUB |
| Taper Major Nominal Diameter | 1.496 INCHES SECOND END IN |
| Pitch Diameter | 10.0000 INCHES NOMINAL IN |
| Tooth Form | STUB |
| Hub Style Designator | PLAIN SECOND END |
| Mounting Hole Nominal Thread Size | 0.500 INCHES AXIALLY THROUGH BODY FIRST END IN |
| Nominal Outside Diameter | 10.249 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 0.947 INCHES SECOND END IN |
| Surface Treatment | OXIDE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL OVERALL |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) AXIALLY THROUGH BODY FIRST END |
| Attachment Method | MOUNTING HOLE |
| Body Recess Nominal Depth | 4.062 INCHES FIRST END IN |
| Face Nominal Width | 2.125 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7188238 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 3020-00-385-7768 is a Gear,spur, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-385-7768 has 1 manufacturer part number on file: 7188238 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 7188238: Keyway Nominal Width: 0.3745 INCHES SECOND END IN; Hub Nominal Diameter: 3.000 INCHES SECOND END IN; Backlash Designation: GRADE C; Teeth Quantity: 60. 26 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.