The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-649-2520, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-649-2520 |
| Primary Part Number | 709-8500409 ITEM 38-5D4 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Thread Length | 0.500 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 709-8500409 ITEM 38-5D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 0.250-20UNC-2AX0.50 CRESD4 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 709-8500409 ITEM 38-5 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 0.250-20UNC-2AX0.50 CRES | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 5305-01-649-2520 is a Screw,cap,socket Head, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-649-2520 has 2 manufacturer part numbers on file: 709-8500409 ITEM 38-5D4 (Naval Inventory Control Point Mechanicsburg), 0.250-20UNC-2AX0.50 CRESD4 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 709-8500409 ITEM 38-5D4: Fastener Length: 0.500 INCHES NOMINAL IN; Thread Length: 0.500 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Nominal Thread Diameter: 0.250 INCHES IN. 9 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.