The Gear,spur, cataloged under National Stock Number 3020-00-239-3951, 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 Capitol Engine Co, Inc Dba Salmini Worldwide. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-239-3951 |
| Primary Part Number | A77257 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Capitol Engine Co, Inc Dba Salmini Worldwide |
| Status | ACTIVE |
| Bore Nominal Diameter | 5.0623 INCHES BOTH ENDS IN |
| Teeth Quantity | 76 |
| Body Style | WEBBED, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Precision Classification | QUALITY NUMBER 12 |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | HUBLESS, RECESSED BODY |
| Material Document and Classification | MIL-S-16974 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 7.0000 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Nominal Outside Diameter | 7.7645 INCHES IN |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 3140 OVERALL |
| Body Recess Nominal Depth | 0.2810 INCHES BOTH ENDS IN |
| Face Nominal Width | 1.000 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 |
|---|---|
| A77257 PRIMARY | Capitol Engine Co, Inc Dba Salmini Worldwide (USA) |
| Reference | Meaning |
|---|---|
| A77257 | 5/9 Secondary reference Sasco Inc Canadian Div |
NSN 3020-00-239-3951 is a Gear,spur, manufactured by Capitol Engine Co, Inc Dba Salmini Worldwide, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-239-3951 has 1 manufacturer part number on file: A77257 (Capitol Engine Co, Inc Dba Salmini Worldwide).
Key specifications for A77257: Bore Nominal Diameter: 5.0623 INCHES BOTH ENDS IN; Teeth Quantity: 76; Body Style: WEBBED, SOLID; Bore Style: PLAIN BOTH ENDS. 15 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.