The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-613-1401, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-00-613-1401 |
| Primary Part Number | 0444-126 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Width Across Flats | 0.079 INCHES NOMINAL IN |
| Head Height | 0.110 INCHES NOMINAL IN |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Thread Length | 0.250 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 100000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 302 OR STEEL COMP 304 OR STEEL COMP 303 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.180 INCHES NOMINAL 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 |
|---|---|
| 0444-126 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| SCREW4-40X1-4IN | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 011742 | Diehl Defence Gmbh & Co. Kg (DEU) |
| Reference | Meaning |
|---|---|
| 0444-126 | C/1 Advisory reference — outside the item-of-supply concept Alliant Techsystems Operations Llc Div Defense Electronic Systems |
NSN 5305-00-613-1401 is a Screw,cap,socket Head, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-613-1401 has 3 manufacturer part numbers on file: 0444-126 (Lockheed Martin Corporation Div Rms - Mitchel Field), SCREW4-40X1-4IN (Sps Technologies, Llc Dba PB Fasteners), 011742 (Diehl Defence Gmbh & Co. Kg).
Key specifications for 0444-126: Width Across Flats: 0.079 INCHES NOMINAL IN; Head Height: 0.110 INCHES NOMINAL IN; Fastener Length: 0.250 INCHES NOMINAL IN; Thread Length: 0.250 INCHES MINIMUM IN. 15 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.