The Coupling,shaft,flexible, cataloged under National Stock Number 3010-00-780-3339, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is L & L Boiler Maintenance Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-00-780-3339 |
| Primary Part Number | 320703383 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | L & L Boiler Maintenance Inc |
| Status | ACTIVE |
| Key Width | 0.313 INCHES NOMINAL FIRST END IN |
| Design Type | DISK |
| Keying Facility Type | INTEGRAL KEY FIRST END |
| Keying Facility Spacing in Deg | 0.0 FIRST END |
| Features Provided | KEYWAY |
| Bore Shape | STRAIGHT BOTH ENDS |
| Keying Facility Quantity | 1 FIRST END |
| Bore Diameter | 0.7500 INCHES NOMINAL SECOND END IN |
| Bore Diameter | 1.3750 INCHES NOMINAL FIRST END 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 |
|---|---|
| 320703383 PRIMARY | L & L Boiler Maintenance Inc (USA) |
| 999301060PC30T033 | L & L Boiler Maintenance Inc (USA) |
| Reference | Meaning |
|---|---|
| 320703383 | 5/9 Secondary reference D & J Parts Inc |
| AA173XAA174XM102 | 5/9 Secondary reference Gast Mfg Corp |
| 999301060PC30T033 | 5/9 Secondary reference D & J Parts Inc |
NSN 3010-00-780-3339 is a Coupling,shaft,flexible, manufactured by L & L Boiler Maintenance Inc, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-00-780-3339 has 2 manufacturer part numbers on file: 320703383 (L & L Boiler Maintenance Inc), 999301060PC30T033 (L & L Boiler Maintenance Inc).
Key specifications for 320703383: Key Width: 0.313 INCHES NOMINAL FIRST END IN; Design Type: DISK; Keying Facility Type: INTEGRAL KEY FIRST END; Keying Facility Spacing in Deg: 0.0 FIRST END. 9 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.