The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-299-6596, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mekel Technology, Inc.. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-299-6596 |
| Primary Part Number | 509441-48 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mekel Technology, Inc. |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES NOMINAL IN |
| Head Height | 0.250 INCHES MAXIMUM IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Thread Length | 0.962 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5626, COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-S-500, COND C OR D MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP E4340 OVERALL |
| Thread Series Designator | UNRF |
| Head Diameter | 0.378 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 |
|---|---|
| 509441-48 | Bmf Corp. Dba Vegas Fastener Manufacturing (USA) |
| 509441-48 | Airtronics, Llc (USA) |
| 509441-48 | Quality Socket Screw Manufacturing Corp (USA) |
| 509441-48 | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA) |
| 509441-48 | Bek, Inc. Dba Level 1 Fasteners (USA) |
| 509441-48 PRIMARY | Mekel Technology, Inc. (USA) |
| 509441-48 | Apollo Aerospace Components Llc (USA) |
| Reference | Meaning |
|---|---|
| 509441-48 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5305-01-299-6596 is a Screw,cap,socket Head, manufactured by Mekel Technology, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-299-6596 has 7 manufacturer part numbers on file: 509441-48 (Bmf Corp. Dba Vegas Fastener Manufacturing), 509441-48 (Airtronics, Llc), 509441-48 (Quality Socket Screw Manufacturing Corp), 509441-48 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co), 509441-48 (Bek, Inc. Dba Level 1 Fasteners) and 2 more.
Key specifications for 509441-48: Width Across Flats: 0.188 INCHES NOMINAL IN; Head Height: 0.250 INCHES MAXIMUM IN; Fastener Length: 1.000 INCHES NOMINAL IN; Thread Length: 0.962 INCHES MAXIMUM IN. 16 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.