The Gear,helical, cataloged under National Stock Number 3020-00-331-2227, 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 Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services. Government technical data includes 28 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-331-2227 |
| Primary Part Number | A67D31A |
| Item Name | Gear,helical |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.252 INCHES BOTH ENDS IN |
| Helix Angle | 14.1500 DEGREES |
| Teeth Quantity | 48 |
| Body Style | PLAIN, SOLID |
| Tooth Direction | RIGHT |
| Bore Style | PLAIN BOTH ENDS |
| Mounting Hole Type and Quantity | 1 THREADED TRANSVERSELY THROUGH HUB FIRST END |
| Nominal Distance Between Body Face and Protruding Hub End | 0.313 INCHES FIRST END IN |
| First Step Nominal Length | 0.063 INCHES FIRST END IN |
| Teeth Type | SINGLE HELIX |
| Nominal Overall Length | 0.500 INCHES IN |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 1.4990 INCHES MINIMUM AND 1.5010 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| First Step Nominal Diameter | 1.000 INCHES FIRST END IN |
| Hub Style Designator | 1 STEP FIRST END |
| Mounting Hole Nominal Thread Size | 0.138 INCHES TRANSVERSELY THROUGH HUB FIRST END IN |
| End Nominal Length | 0.250 INCHES FIRST END IN |
| Nominal Outside Diameter | 1.560 INCHES IN |
| Mounting Hole Thread Quantity Per Inch | 32 TRANSVERSELY THROUGH HUB FIRST END |
| Surface Treatment | NICKEL HUB |
| End Nominal Diameter | 0.625 INCHES FIRST END IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | COPPER ALLOY HUB |
| Material | PLASTIC TEETH |
| Mounting Hole Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) TRANSVERSELY THROUGH HUB FIRST END |
| Attachment Method | MOUNTING HOLE |
| Face Nominal Width | 0.188 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 |
NSN 3020-00-331-2227 is a Gear,helical, manufactured by Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-331-2227 has 2 manufacturer part numbers on file: A67D31A (Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services), 8024341 (Us Army Aviation and Missile Command).
Key specifications for A67D31A: Bore Nominal Diameter: 0.252 INCHES BOTH ENDS IN; Helix Angle: 14.1500 DEGREES; Teeth Quantity: 48; Body Style: PLAIN, SOLID. 28 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.