The Shaft,shouldered, cataloged under National Stock Number 3040-00-677-8770, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Telemechanics Inc. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-677-8770 |
| Primary Part Number | 156321 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Second End External Thread Length | 0.234 INCHES NOMINAL IN |
| Step Quantity | 2 |
| First End Diameter | 0.1880 INCHES NOMINAL IN |
| Second End Diameter | 0.1360 INCHES NOMINAL IN |
| Largest Step Diameter | 0.188 INCHES NOMINAL IN |
| First End Style | PLAIN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNAL THREADED |
| Material | STEEL |
| 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 |
|---|---|
| 156321 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 156321 | 5/9 Secondary reference Daytel Mfg Inc |
| 156321 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 3040-00-677-8770 is a Shaft,shouldered, manufactured by Telemechanics Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-677-8770 has 1 manufacturer part number on file: 156321 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-475-2615. Verify interchangeability with system specifications before substitution.
Key specifications for 156321: Second End External Thread Length: 0.234 INCHES NOMINAL IN; Step Quantity: 2; First End Diameter: 0.1880 INCHES NOMINAL IN; Second End Diameter: 0.1360 INCHES NOMINAL IN. 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.