The Gear,spur, cataloged under National Stock Number 3020-01-144-4307, 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 Pcx Aerosystems-Manchester, Llc Dba Pcx Aerosystems - Manchester Llc. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-144-4307 |
| Primary Part Number | 42312E190 |
| Item Name | Gear,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Pcx Aerosystems-Manchester, Llc Dba Pcx Aerosystems - Manchester Llc |
| Status | ACTIVE |
| Keyway Nominal Width | 0.064 INCHES BOTH ENDS0.064 INCHES BOTH ENDS IN |
| Teeth Quantity | 8989 |
| Body Style | WEBBED, OFFSET, SOLIDWEBBED, OFFSET, SOLID |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL42.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | BELL SHAPE BODY, PROTRUDING HUBBELL SHAPE BODY, PROTRUDING HUB |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALLMIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 2.7813 INCHES NOMINAL2.7813 INCHES NOMINAL IN |
| Tooth Form | STANDARDSTANDARD |
| Pressure Angle | 22.5000 DEGREES22.5000 DEGREES |
| Material | STEEL COMP 4340 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 42312E190 | Pcx Aerosystems-Manchester, Llc Dba Pcx Aerosystems - Manchester Llc (USA) |
| 42312E190 | Precision Gear Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 42312-190 | 3/2 Design control — primary reference U.S. Government activity |
| 42312E190 | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-144-4307 is a Gear,spur, manufactured by Pcx Aerosystems-Manchester, Llc Dba Pcx Aerosystems - Manchester Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-144-4307 has 2 manufacturer part numbers on file: 42312E190 (Pcx Aerosystems-Manchester, Llc Dba Pcx Aerosystems - Manchester Llc), 42312E190 (Precision Gear Industries Llc).
Key specifications for 42312E190: Keyway Nominal Width: 0.064 INCHES BOTH ENDS0.064 INCHES BOTH ENDS IN; Teeth Quantity: 8989; Body Style: WEBBED, OFFSET, SOLIDWEBBED, OFFSET, SOLID; Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL42.0 ROCKWELL C MAXIMUM OVERALL. 10 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.
NSN 3020-01-144-4307 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.