The Screw,tapping, cataloged under National Stock Number 5305-01-043-0530, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-043-0530 |
| Primary Part Number | 28230-001 |
| Item Name | Screw,tapping |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company |
| Status | ACTIVE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Head Style | FLAT COUNTERSUNK |
| Surface Treatment | NICKEL OVERALL |
| Internal Drive Style | SLOT |
| Countersink Angle | 81.0 DEGREES NOMINAL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Head Diameter | 0.257 INCHES MINIMUM AND 0.279 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 |
|---|---|
| 28230-001 PRIMARY | Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company (USA) |
| Reference | Meaning |
|---|---|
| 28230-1 | 5/9 Secondary reference Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company |
NSN 5305-01-043-0530 is a Screw,tapping, manufactured by Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-043-0530 has 1 manufacturer part number on file: 28230-001 (Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company).
3 possible matches (shared part number, not a government interchangeability claim): 1315-01-245-4950, 5930-01-681-2824, 5130-01-716-0829. Verify interchangeability with system specifications before substitution.
Key specifications for 28230-001: Fastener Length: 0.500 INCHES NOMINAL IN; Head Style: FLAT COUNTERSUNK; Surface Treatment: NICKEL OVERALL; Internal Drive Style: SLOT. 7 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.