The Nut,plain,spline, cataloged under National Stock Number 5310-00-342-7806, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Controls, Inc. Div Actuation Division. 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 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 | 5310-00-342-7806 |
| Primary Part Number | 138670 |
| Item Name | Nut,plain,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Curtiss-Wright Controls, Inc. Div Actuation Division |
| Status | ACTIVE |
| Thread Series | UNS |
| Thread Pitch Diameters | +3.2584 TO 3.2624 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.3125 INCHES IN |
| Nut Diameter | 4.183 INCHES MINIMUM AND 4.188 INCHES MAXIMUM IN |
| Pilot Diameter | 3.9985 INCHES MINIMUM AND 3.9995 INCHES MAXIMUM IN |
| Pilot Length | 0.480 INCHES NOMINAL IN |
| Nut Height | 0.700 INCHES MINIMUM AND 0.704 INCHES MAXIMUM IN |
| Nut Style | SPLINE |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 138670 PRIMARY | Curtiss-Wright Controls, Inc. Div Actuation Division (USA) |
NSN 5310-00-342-7806 is a Nut,plain,spline, manufactured by Curtiss-Wright Controls, Inc. Div Actuation Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-342-7806 has 1 manufacturer part number on file: 138670 (Curtiss-Wright Controls, Inc. Div Actuation Division).
1 possible match (shared part number, not a government interchangeability claim): 5306-01-666-7758. Verify interchangeability with system specifications before substitution.
Key specifications for 138670: Thread Series: UNS; Thread Pitch Diameters: +3.2584 TO 3.2624 INCHES IN; Thread Direction: RIGHT-HAND; Nominal Thread Size: 3.3125 INCHES 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.