The Gear,antibacklash,spur, cataloged under National Stock Number 3020-01-148-1477, 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 Designatronics Incorporated Div Sterling Instruments Div. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-148-1477 |
| Primary Part Number | S9711AR0011 |
| Item Name | Gear,antibacklash,spur |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Designatronics Incorporated Div Sterling Instruments Div |
| Status | ACTIVE |
| Bore Nominal Diameter | 0.0938 INCHES BOTH ENDS IN |
| Hub Nominal Diameter | 0.187 INCHES FIRST END IN |
| Teeth Quantity | 32 |
| Clamping Surface Nominal Length | 0.190 INCHES FIRST END IN |
| Surface Treatment Document and Classification | QQ-P-35,TYPE 4 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Bore Style | PLAIN BOTH ENDS |
| Nominal Distance Between Body Face and Protruding Hub End | 0.221 INCHES FIRST END IN |
| Precision Classification | QUALITY NUMBER 10 |
| Style Designator | PROTRUDING HUB |
| Material Document and Classification | QQ-S-764,TYPE 303 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Pitch Diameter | 0.4993 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Tooth Form | STANDARD |
| Hub Style Designator | SPLIT FIRST END |
| Nominal Outside Diameter | 0.5304 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Pressure Angle | 20.0000 DEGREES |
| Material | STEEL COMP 303 OVERALL |
| Attachment Method | CLAMP |
| Face Nominal Width | 0.104 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 |
|---|---|
| S9711AR0011 PRIMARY | Designatronics Incorporated Div Sterling Instruments Div (USA) |
| Reference | Meaning |
|---|---|
| 901056 | D/9 Drawing number reference only U.S. Government activity |
| 901056-1B | 5/2 Secondary reference U.S. Government activity |
NSN 3020-01-148-1477 is a Gear,antibacklash,spur, manufactured by Designatronics Incorporated Div Sterling Instruments Div, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-148-1477 has 1 manufacturer part number on file: S9711AR0011 (Designatronics Incorporated Div Sterling Instruments Div).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-446-3264. Verify interchangeability with system specifications before substitution.
Key specifications for S9711AR0011: Bore Nominal Diameter: 0.0938 INCHES BOTH ENDS IN; Hub Nominal Diameter: 0.187 INCHES FIRST END IN; Teeth Quantity: 32; Clamping Surface Nominal Length: 0.190 INCHES FIRST END IN. 19 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.