The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-449-4457, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-449-4457 |
| Primary Part Number | 12933759 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Width Across Flats | 0.250 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN |
| Head Height | 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Fastener Length | 4.970 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633 TY 2 EMBRITTLEMENT RELIEVE AFTER PLATING ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.450 INCHES MINIMUM AND 1.550 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A322 OR A331 .500 DIA CONDITION OPTIONAL ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT FILLISTER |
| Thread Direction | RIGHT-HAND |
| Nonstandard Thread Pitch Diameter | +0.2723 TO 0.2764 INCHES IN |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4130 OR STEEL COMP 8630 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.458 INCHES MINIMUM AND 0.469 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 |
|---|---|
| 12933759 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 5305-01-449-4457 is a Screw,cap,socket Head, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-449-4457 has 1 manufacturer part number on file: 12933759 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
Key specifications for 12933759: Width Across Flats: 0.250 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN; Head Height: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Fastener Length: 4.970 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633 TY 2 EMBRITTLEMENT RELIEVE AFTER PLATING ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 17 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.