The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-643-6538, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Endries International, Inc. Dba Servtonics, an Endries International, Inc.. Government technical data includes 10 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 | 5305-01-643-6538 |
| Primary Part Number | X103 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Endries International, Inc. Dba Servtonics, an Endries International, Inc. |
| Status | ACTIVE |
| Head Height | 0.16 INCHES NOMINAL IN |
| Fastener Length | 0.75 INCHES NOMINAL IN |
| Thread Length | 0.75 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.44 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| X103 PRIMARY | Endries International, Inc. Dba Servtonics, an Endries International, Inc. (USA) |
NSN 5305-01-643-6538 is a Screw,cap,hexagon Head, manufactured by Endries International, Inc. Dba Servtonics, an Endries International, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-643-6538 has 1 manufacturer part number on file: X103 (Endries International, Inc. Dba Servtonics, an Endries International, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-690-9937. Verify interchangeability with system specifications before substitution.
Key specifications for X103: Head Height: 0.16 INCHES NOMINAL IN; Fastener Length: 0.75 INCHES NOMINAL IN; Thread Length: 0.75 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN. 10 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.