The Gearshaft,spur, cataloged under National Stock Number 3040-01-256-3662, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Dynalec Corporation. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-256-3662 |
| Primary Part Number | MB4202-1 PIECE 81,82 |
| Item Name | Gearshaft,spur |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Dynalec Corporation |
| Status | ACTIVE |
| Shaft Material | STEEL CORROSION RESISTING |
| Teeth Quantity | 16 |
| Diametral Pitch | 32 |
| Gear Material | COPPER ALLOY |
| 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 |
|---|---|
| 4L87 | Dynalec Corporation (USA) |
| MB4202-1 PIECE 81,82 PRIMARY | Dynalec Corporation (USA) |
| Reference | Meaning |
|---|---|
| MB4202-1 PIECE 81,82 | 5/9 Secondary reference The Electric Tachometer Corp. |
| 4L87 | 5/9 Secondary reference The Electric Tachometer Corp. |
| MB4202-1 | D/9 Drawing number reference only The Electric Tachometer Corp. |
NSN 3040-01-256-3662 is a Gearshaft,spur, manufactured by Dynalec Corporation, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-256-3662 has 2 manufacturer part numbers on file: 4L87 (Dynalec Corporation), MB4202-1 PIECE 81,82 (Dynalec Corporation).
3 possible matches (shared part number, not a government interchangeability claim): 3020-01-256-3690, 6320-01-267-7990, 6320-01-364-1732. Verify interchangeability with system specifications before substitution.
Key specifications for MB4202-1 PIECE 81,82: Shaft Material: STEEL CORROSION RESISTING; Teeth Quantity: 16; Diametral Pitch: 32; Gear Material: COPPER ALLOY. 4 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.