The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-504-8239, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Accurate Precision Fastener Corp. Div Accurate Precision Fasteners Corp. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-504-8239 |
| Primary Part Number | SFR440-5/16 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Accurate Precision Fastener Corp. Div Accurate Precision Fasteners Corp |
| Status | ACTIVE |
| Head Height | 0.035 INCHES NOMINAL IN |
| Fastener Length | 0.312 INCHES NOMINAL IN |
| Thread Length | 0.312 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE II |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.279 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 |
|---|---|
| SFR440-5/16 PRIMARY | Accurate Precision Fastener Corp. Div Accurate Precision Fasteners Corp (USA) |
| NT521R0440AC5 PRIMARY | Pattonair Usa, Inc. (USA) |
| 3590AS590-3 | Breeze-Eastern Llc (USA) |
| Reference | Meaning |
|---|---|
| 3590AS590-3 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 5305-01-504-8239 is a Screw,cap,socket Head, manufactured by Accurate Precision Fastener Corp. Div Accurate Precision Fasteners Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-504-8239 has 3 manufacturer part numbers on file: SFR440-5/16 (Accurate Precision Fastener Corp. Div Accurate Precision Fasteners Corp), NT521R0440AC5 (Pattonair Usa, Inc.), 3590AS590-3 (Breeze-Eastern Llc).
Key specifications for SFR440-5/16: Head Height: 0.035 INCHES NOMINAL IN; Fastener Length: 0.312 INCHES NOMINAL IN; Thread Length: 0.312 INCHES NOMINAL 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.