The Gear Sector,worm Wheel, cataloged under National Stock Number 3020-00-830-9779, 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 Tyco Fire Products Lp. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-830-9779 |
| Primary Part Number | 20-03825 |
| Item Name | Gear Sector,worm Wheel |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Tyco Fire Products Lp |
| Status | ACTIVE |
| Helix Angle | 8.4333 DEGREES |
| Hub Nominal Diameter | 3.125 INCHES BOTH ENDS IN |
| Teeth Quantity | 46 |
| Nominal Outside Radius | 4.800 INCHES IN |
| Tooth Direction | RIGHT |
| Nominal Distance Between Body Face and Protruding Hub End | 2.531 INCHES BOTH ENDS IN |
| Throat Nominal Radius | 4.800 INCHES IN |
| Face Type | CONCAVE |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Overall Length | 6.813 INCHES IN |
| Style Designator | PROTRUDING HUBS |
| Hub Style Designator | PLAIN BOTH ENDS |
| Arc Nominal Length | 11.310 INCHES IN |
| Pitch Radius | 4.6000 INCHES NOMINAL IN |
| Pressure Angle | 14.5000 DEGREES |
| Material | STEEL OVERALL |
| Mating Thread Lead Quantity | 2 |
| 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 |
NSN 3020-00-830-9779 is a Gear Sector,worm Wheel, manufactured by Tyco Fire Products Lp, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-830-9779 has 3 manufacturer part numbers on file: 20-03825 (Tyco Fire Products Lp), 13825 (Portland Valve Llc), V3825 (Tyco Fire Products Lp).
5 possible matches (shared part number, not a government interchangeability claim): 5905-01-079-1347, 4720-01-118-3022, 6145-01-230-0057. Verify interchangeability with system specifications before substitution.
Key specifications for 20-03825: Helix Angle: 8.4333 DEGREES; Hub Nominal Diameter: 3.125 INCHES BOTH ENDS IN; Teeth Quantity: 46; Nominal Outside Radius: 4.800 INCHES IN. 18 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.