The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-228-4685, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-228-4685 |
| Primary Part Number | 3176210-C-263 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Head Height | 0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN |
| Fastener Length | 2.422 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633,TYPE 2,CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.500 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN |
| Supplementary Features | MEETS ANSI B18.2.1 TABLE 4 SIZE 5/8 EXCEPT SELF-LOCKING ELEMENT MIL-F-18240 |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | ASTM A449 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A354 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81348-FF-S-85 GOVERNMENT SPECIFICATION |
| Departure From Cited Document | FF-S-85,PARAGRAPH 3.1.6,SELF-LOCKING ELEMENT AND PARAGRAPH 3.4.4 ZINC PLATING |
| Width Between Flats | 0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 10P STYLE AND 5/8-11UNC SIZE |
| Locking Feature | PATCH THREADS |
| Surface Treatment | CHROMATE ZINC OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL 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 | X |
| Part Number | Manufacturer |
|---|---|
| 3176210-C-263 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 3176210-C-263 | 5/9 Secondary reference Bae Systems Land & Armaments L.p. |
| FF-S-85 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-228-4685 is a Screw,cap,hexagon Head, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-228-4685 has 1 manufacturer part number on file: 3176210-C-263 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 3176210-C-263: Head Height: 0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN; Fastener Length: 2.422 INCHES MINIMUM AND 2.562 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633,TYPE 2,CLASS 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.500 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN. 22 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.