The Gear,spur, cataloged under National Stock Number 3020-01-138-6572, 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 Lockheed Martin Corporation Div Rms. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-138-6572 |
| Primary Part Number | 77C716272P004 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.125 INCHES BOTH ENDS0.125 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.188 INCHES FIRST END IN |
| Hub Nominal Diameter | 0.188 INCHES SECOND END IN |
| Teeth Quantity | 9999 |
| Clamping Surface Nominal Length | 0.172 INCHES FIRST END IN |
| Body Style | WEBBED, SOLIDWEBBED, SOLID |
| Bore Style | PLAIN BOTH ENDSPLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.171 INCHES FIRST END0.171 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10QUALITY NUMBER 10 |
| Style Designator | PROTRUDING HUBSPROTRUDING HUBS |
| Pitch Diameter | 1.0312 INCHES NOMINAL1.0312 INCHES NOMINAL IN |
| Tooth Form | STANDARDSTANDARD |
| Hub Style Designator | SPLIT FIRST END |
| Hub Style Designator | PLAIN SECOND END |
| Nominal Outside Diameter | 1.052 INCHES1.052 INCHES IN |
| Pressure Angle | 20.0000 DEGREES20.0000 DEGREES |
| Material | STEEL CORROSION RESISTING OVERALL |
| Face Nominal Width | 0.062 INCHES0.062 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 |
|---|---|
| 77C716272P004 | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 77C716272 | 7/1 Vendor item drawing reference Lockheed Martin Corporation Div Rms |
| 2016-99-125 | 3/9 Design control — primary reference Precision Mechanisms Corp. Dba Precision Mechanisms Corp |
NSN 3020-01-138-6572 is a Gear,spur, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-138-6572 has 1 manufacturer part number on file: 77C716272P004 (Lockheed Martin Corporation Div Rms).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-140-4909. Verify interchangeability with system specifications before substitution.
Key specifications for 77C716272P004: Bore Nominal Diameter: 0.125 INCHES BOTH ENDS0.125 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.188 INCHES FIRST END IN; Hub Nominal Diameter: 0.188 INCHES SECOND END IN; Teeth Quantity: 9999. 18 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.