The Collar,shaft, cataloged under National Stock Number 3040-00-322-5580, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Loar Manufacturing Corp. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-322-5580 |
| Primary Part Number | SM-B-186981 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Loar Manufacturing Corp |
| Status | ACTIVE |
| Securing Hole Type and Location | THREADED ALL HOLES |
| Screw Thread Series Designator and Location | ALL HOLES UNF |
| Angle Between Centerlines of Securing Holes in Deg | 180.0 |
| Securing Hole Quantity | 2 |
| Material | STEEL |
| Thickness | 0.344 INCHES NOMINAL 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 |
|---|---|
| SM-B-186981 | Loar Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| SM-B-186981 | 3/2 Design control — primary reference U.S. Government activity |
| 54927 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-00-322-5580 is a Collar,shaft, manufactured by Loar Manufacturing Corp, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-322-5580 has 1 manufacturer part number on file: SM-B-186981 (Loar Manufacturing Corp).
Key specifications for SM-B-186981: Securing Hole Type and Location: THREADED ALL HOLES; Screw Thread Series Designator and Location: ALL HOLES UNF; Angle Between Centerlines of Securing Holes in Deg: 180.0; Securing Hole Quantity: 2. 6 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.