The Gearshaft,spur, cataloged under National Stock Number 3040-01-604-3977, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-01-604-3977 |
| Primary Part Number | 531807-2 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Shaft Type | STRAIGHT |
| Shaft Material | STEEL UNS K24065 OR STEEL UNS K52355 |
| Shaft End Size | 0.634 INCHES AND 0.639 INCHES IN |
| Shaft Diameter | 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Teeth Quantity | 15 |
| Gear Outside Diameter | 0.857 INCHES MINIMUM AND 0.862 INCHES MAXIMUM IN |
| Gear Material | STEEL UNS K24065 OR STEEL UNS K52355 |
| Shaft End Type | SPLINED STRAIGHT |
| Gear Location on Shaft | ON END OF SHAFT |
| Pressure Angle | 20.0 DEGREES |
| Face Width | 0.520 INCHES MINIMUM AND 0.550 INCHES MAXIMUM 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 |
|---|---|
| 531807-2 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 531807-2 | 5/9 Secondary reference Honeywell International Inc. Div Aerospace - Torrance |
NSN 3040-01-604-3977 is a Gearshaft,spur, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-604-3977 has 1 manufacturer part number on file: 531807-2 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 531807-2: Shaft Type: STRAIGHT; Shaft Material: STEEL UNS K24065 OR STEEL UNS K52355; Shaft End Size: 0.634 INCHES AND 0.639 INCHES IN; Shaft Diameter: 0.420 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN. 11 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.