The Gear,antibacklash,spur, cataloged under National Stock Number 3020-00-477-1839, 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 Peerless Instrument Co., Inc. Dba Peerless Instrument Co Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-477-1839 |
| Primary Part Number | 243-127-2140 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Peerless Instrument Co., Inc. Dba Peerless Instrument Co Inc |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.1185 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.188 INCHES FIRST END IN |
| Teeth Quantity | 140 |
| Clamping Surface Nominal Length | 0.1880 INCHES FIRST END IN |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.2180 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 12 |
| Style Designator | PROTRUDING HUB |
| Pitch Diameter | 1.4583 INCHES NOMINAL IN |
| Tooth Form | STANDARD |
| Hub Style Designator | SPLIT FIRST END |
| Nominal Outside Diameter | 1.4792 INCHES IN |
| Surface Treatment | ANODIZE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | ALUMINUM ALLOY OVERALL |
| Attachment Method | CLAMP |
| Face Nominal Width | 0.104 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 243-127-2140 | Peerless Instrument Co., Inc. Dba Peerless Instrument Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 243-127-2140 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3020-00-477-1839 is a Gear,antibacklash,spur, manufactured by Peerless Instrument Co., Inc. Dba Peerless Instrument Co Inc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-477-1839 has 1 manufacturer part number on file: 243-127-2140 (Peerless Instrument Co., Inc. Dba Peerless Instrument Co Inc).
Key specifications for 243-127-2140: Bore Nominal Diameter: 0.1185 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.188 INCHES FIRST END IN; Teeth Quantity: 140; Clamping Surface Nominal Length: 0.1880 INCHES FIRST END IN. 17 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 3020-00-477-1839 has DEMIL Code Q. 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.