The Screw Assembly,panel, cataloged under National Stock Number 5305-01-446-5325, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-446-5325 |
| Primary Part Number | 841581-51 |
| Item Name | Screw Assembly,panel |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| Status | ACTIVE |
| Head Height | 0.922 INCHES MINIMUM AND 0.952 INCHES MAXIMUM IN |
| Fastener Length | 0.922 INCHES MINIMUM AND 0.952 INCHES MAXIMUM IN |
| Material Accommodated Thickness | 0.062 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | OXIDE FASTENER |
| Surface Treatment | PASSIVATE SPRING |
| Surface Treatment | OXIDE PRIMARY WASHER |
| Surface Treatment | OXIDE STAND-OFF |
| Surface Treatment | OXIDE SECONDARY WASHER |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | NC |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 SPRING |
| Material | IRON ALLOY 660 FASTENER |
| Material | STEEL COMP 302 PRIMARY WASHER |
| Material | STEEL COMP 302 STAND-OFF |
| Material | STEEL COMP 304 SECONDARY WASHER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.289 INCHES MINIMUM AND 0.329 INCHES MAXIMUM 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 |
|---|---|
| 841581-51 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA) |
| FT1046-51A | Fastener Technology Corp (USA) |
| Reference | Meaning |
|---|---|
| 841581-51 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
NSN 5305-01-446-5325 is a Screw Assembly,panel, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-446-5325 has 2 manufacturer part numbers on file: 841581-51 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), FT1046-51A (Fastener Technology Corp).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-695-9173. Verify interchangeability with system specifications before substitution.
Key specifications for 841581-51: Head Height: 0.922 INCHES MINIMUM AND 0.952 INCHES MAXIMUM IN; Fastener Length: 0.922 INCHES MINIMUM AND 0.952 INCHES MAXIMUM IN; Material Accommodated Thickness: 0.062 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.164 INCHES IN. 21 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.