The Screw,machine, cataloged under National Stock Number 5305-00-151-6909, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Kearflex Engineering Company. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-151-6909 |
| Primary Part Number | SFC-440-4-SS-B |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Kearflex Engineering Company |
| Status | ACTIVE |
| Screw Surface Treatment | OXIDE |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Thread Length | 0.111 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Internal Drive Style | SLOT |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.210 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 |
|---|---|
| SFC-440-4-SS-B PRIMARY | Kearflex Engineering Company (USA) |
| Reference | Meaning |
|---|---|
| 10125013 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-00-151-6909 is a Screw,machine, manufactured by Kearflex Engineering Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-151-6909 has 1 manufacturer part number on file: SFC-440-4-SS-B (Kearflex Engineering Company).
Key specifications for SFC-440-4-SS-B: Screw Surface Treatment: OXIDE; Fastener Length: 0.250 INCHES NOMINAL IN; Thread Length: 0.111 INCHES MINIMUM IN; Nominal Thread Diameter: 0.112 INCHES IN. 13 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.