The Gear,worm Wheel, cataloged under National Stock Number 3020-00-338-9583, 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 Circor Pumps North America Llc. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-338-9583 |
| Primary Part Number | SG2557PC83 |
| Item Name | Gear,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.374 INCHES BOTH ENDS IN |
| Bore Nominal Diameter | 1.874 INCHES BOTH ENDS IN |
| Helix Angle | 17.2333 DEGREES |
| Hub Nominal Diameter | 2.875 INCHES BOTH ENDS IN |
| Teeth Quantity | 35 |
| Body Style | WEBBED, WITH LIGHTENING HOLES |
| Tooth Direction | RIGHT |
| Bore Style | W/ KEYWAY BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.656 INCHES FIRST END IN |
| Nominal Distance Between Body Face and Protruding Hub End | 0.219 INCHES SECOND END IN |
| Throat Nominal Radius | 0.606 INCHES IN |
| Face Type | CONCAVE |
| Style Designator | PROTRUDING HUBS |
| Material Document and Classification | MIL-B-16540,GRADE A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 5.4850 INCHES NOMINAL IN |
| Hub Style Designator | PLAIN BOTH ENDS |
| Nominal Outside Diameter | 6.000 INCHES IN |
| Nominal Distance From Bore Center to Keyway Bottom | 1.139 INCHES BOTH ENDS IN |
| Pressure Angle | 27.5000 DEGREES |
| Material | COPPER ALLOY 903 OVERALL |
| Mating Thread Lead Quantity | 3 |
| Face Nominal Width | 1.125 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 |
|---|---|
| SG2557PC83 PRIMARY | Circor Pumps North America Llc (USA) |
| W50AZX22 | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3107731PC83 | 5/9 Secondary reference U.S. Government activity |
| SG2561PC83 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG3658PC45 | 5/9 Secondary reference Siemens Energy, Inc. |
| W50AZX22 | 5/9 Secondary reference Imo Industries Inc Delroyd Worm Gear Div |
| SG2914PC98 | 5/9 Secondary reference Circor Pumps North America Llc |
| SG2914PC98 | 5/9 Secondary reference Siemens Energy, Inc. |
| SG3658PC45 | 5/9 Secondary reference Circor Pumps North America Llc |
| SG2561PC83 | 5/9 Secondary reference Circor Pumps North America Llc |
| SG2557PC83 | 5/9 Secondary reference Siemens Energy, Inc. |
| 3107727PC83 | 5/9 Secondary reference U.S. Government activity |
| G16933PC98 | 5/9 Secondary reference Siemens Energy, Inc. |
| DE1006S4200H1222720PC98 | 5/9 Secondary reference U.S. Government activity |
NSN 3020-00-338-9583 is a Gear,worm Wheel, manufactured by Circor Pumps North America Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-338-9583 has 2 manufacturer part numbers on file: SG2557PC83 (Circor Pumps North America Llc), W50AZX22 (Siemens Energy, Inc.).
Key specifications for SG2557PC83: Keyway Nominal Width: 0.374 INCHES BOTH ENDS IN; Bore Nominal Diameter: 1.874 INCHES BOTH ENDS IN; Helix Angle: 17.2333 DEGREES; Hub Nominal Diameter: 2.875 INCHES BOTH ENDS IN. 22 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.