The Connecting Link,rigid, cataloged under National Stock Number 3040-01-258-7306, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Ara, Inc. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-258-7306 |
| Primary Part Number | B3890-1 |
| Item Name | Connecting Link,rigid |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Ara, Inc |
| Status | ACTIVE |
| Body Diameter | 0.3125 INCHES NOMINAL IN |
| Body Construction | SOLID |
| Link Style | RETAINING PIN HOLE TO EXTERNAL THREAD |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B3890-1 PRIMARY | Ara, Inc (USA) |
| Reference | Meaning |
|---|---|
| B3890 | D/9 Drawing number reference only Ara, Inc |
NSN 3040-01-258-7306 is a Connecting Link,rigid, manufactured by Ara, Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-258-7306 has 1 manufacturer part number on file: B3890-1 (Ara, Inc).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-258-7307, 3040-01-258-7308. Verify interchangeability with system specifications before substitution.
Key specifications for B3890-1: Body Diameter: 0.3125 INCHES NOMINAL IN; Body Construction: SOLID; Link Style: RETAINING PIN HOLE TO EXTERNAL THREAD; Overall Length: 1.700 INCHES NOMINAL IN. 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.
NSN 3040-01-258-7306 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.