The Gear,spur, cataloged under National Stock Number 3020-00-433-9683, 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 Secs Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-433-9683 |
| Primary Part Number | GP39-25 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Secs Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.125 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.312 INCHES FIRST END IN |
| Teeth Quantity | 25 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.187 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-A-225/6,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.3462 INCHES MINIMUM AND 0.3472 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | PINNED FIRST END |
| Nominal Outside Diameter | 0.374 INCHES IN |
| Surface Treatment | ANODIZE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Face Nominal Width | 0.125 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 |
|---|---|
| GP39-25 PRIMARY | Secs Inc (USA) |
| G20-25 PRIMARY | Roller Bearing Co of America, Inc Div Pic Design (USA) |
| B23A25 | Designatronics Incorporated Div Sterling Instruments Div (USA) |
| E44A25 PRIMARY | Designatronics Inc Perfect Gear and Instrument Div (USA) |
| Reference | Meaning |
|---|---|
| P72A10-25 | 5/9 Secondary reference W. M. Berg, Inc. |
NSN 3020-00-433-9683 is a Gear,spur, manufactured by Secs Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-433-9683 has 4 manufacturer part numbers on file: GP39-25 (Secs Inc), G20-25 (Roller Bearing Co of America, Inc Div Pic Design), B23A25 (Designatronics Incorporated Div Sterling Instruments Div), E44A25 (Designatronics Inc Perfect Gear and Instrument Div).
2 possible matches (shared part number, not a government interchangeability claim): 6550-01-361-6838, 4330-01-381-0829. Verify interchangeability with system specifications before substitution.
Key specifications for GP39-25: Bore Nominal Diameter: 0.125 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.312 INCHES FIRST END IN; Teeth Quantity: 25; Body Style: PLAIN, SOLID. 16 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.