The Gear,spur, cataloged under National Stock Number 3020-01-281-2465, 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 Anchor Crane & Hoist Dba Anchor Crane and Hoist Division of Rpc Inc.. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3020-01-281-2465 |
| Primary Part Number | S530 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Anchor Crane & Hoist Dba Anchor Crane and Hoist Division of Rpc Inc. |
| Status | ACTIVE |
| Bore Nominal Diameter | 1.656 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 3.375 INCHES FIRST END IN |
| Teeth Quantity | 30 |
| Body Style | PLAIN, SOLID |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 1.250 INCHES FIRST END IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 6.0000 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN FIRST END |
| Nominal Outside Diameter | 6.400 INCHES IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Face Nominal Width | 1.750 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 |
|---|---|
| S530 | Anchor Crane & Hoist Dba Anchor Crane and Hoist Division of Rpc Inc. (USA) |
| Reference | Meaning |
|---|---|
| S530-14 1/2 | 3/9 Design control — primary reference Martin Sprocket and Gear Inc |
| D481FIND4 | C/1 Advisory reference — outside the item-of-supply concept Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
NSN 3020-01-281-2465 is a Gear,spur, manufactured by Anchor Crane & Hoist Dba Anchor Crane and Hoist Division of Rpc Inc., classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-281-2465 has 1 manufacturer part number on file: S530 (Anchor Crane & Hoist Dba Anchor Crane and Hoist Division of Rpc Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5895-01-551-1755. Verify interchangeability with system specifications before substitution.
Key specifications for S530: Bore Nominal Diameter: 1.656 INCHES BOTH ENDS IN; Hub Nominal Diameter: 3.375 INCHES FIRST END IN; Teeth Quantity: 30; Body Style: PLAIN, SOLID. 13 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.