The Screw,machine, cataloged under National Stock Number 5305-01-657-8009, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Sippican, Inc. Div Communication Division. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Screw,machine |
| FSC / FSG | 5305 — Screws (FSG 53) |
| Manufacturers | Lockheed Martin Sippican, Inc. Div Communication Division (CAGE 13030); Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion (CAGE 16848) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-657-8009 |
| Primary Part Number | B248638-75 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Sippican, Inc. Div Communication Division |
| Status | ACTIVE |
| 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 |
|---|---|
| B248638-75 PRIMARY | Lockheed Martin Sippican, Inc. Div Communication Division (USA) |
| B248638-75 | Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion (USA) |
| Reference | Meaning |
|---|---|
| B248638 | D/9 Drawing number reference only Lockheed Martin Sippican, Inc. Div Communication Division |
NSN 5305-01-657-8009 is a Screw,machine, manufactured by Lockheed Martin Sippican, Inc. Div Communication Division, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-657-8009 has 2 manufacturer part numbers on file: B248638-75 (Lockheed Martin Sippican, Inc. Div Communication Division), B248638-75 (Lockheed Martin Sippican, Inc. Div Lockheed Martin Marion).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-657-8050. Verify interchangeability with system specifications before substitution.
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.