The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-273-4731, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5305-00-273-4731 |
| Primary Part Number | 518272 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | CANCELLED |
| Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 410 OR STEEL COMP 416 OR STEEL COMP 420 OVERALL |
| Thread Class | 3A A |
| Minimum Yield Strength | 30000 POUNDS PER SQUARE INCH LBS |
| Nondefinitive Spec/std Data | 1 TYPE AND 1936 SERIES |
| Hardness Rating | 80.0 ROCKWELL B MINIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Head Height | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Length | 1.000 INCHES NOMINAL IN |
| Head Diameter | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Width Across Flats | 0.187 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Quantity Per Inch | 20 |
| Fastener Length | 1.250 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Internal Drive Style | HEXAGON |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 518272 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| MS35461-27 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 43S4380PC596 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5305-00-273-4731 is a Screw,cap,socket Head, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5305 (No Item Name Available). Status: cancelled.
NSN 5305-00-273-4731 has 3 cross-referenced part numbers: 518272 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), MS35461-27 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 43S4380PC596 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
There are 2 known substitutes for 5305-00-273-4731: 2840-00-760-4256, 5305-00-988-7834. Verify interchangeability with system specifications before substitution.
Key specifications for 518272: Material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 410 OR STEEL COMP 416 OR STEEL COMP 420 OVERALL; Thread Class: 3A A; Minimum Yield Strength: 30000 POUNDS PER SQUARE INCH LBS; Nondefinitive Spec/std Data: 1 TYPE AND 1936 SERIES. 18 total characteristics are documented in the Federal Logistics Information System.
NSN 5305-00-273-4731 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.