The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-206-3521, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lake Shore Systems, Inc.. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-206-3521 |
| Primary Part Number | 28A |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — No Item Name Available |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Thread Length | 2.000 INCHES MAXIMUM IN |
| Head Style | HEXAGON |
| Minimum Yield Strength | 52000 POUNDS PER SQUARE INCH LBS |
| Material Document and Classification | SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | STEEL OVERALL |
| Hardness Rating | 100.0 ROCKWELL B MAXIMUM OVERALL |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Height | 0.455 INCHES MINIMUM AND 0.483 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 10 |
| Minimum Tensile Strength | 64000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.100 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 10 STYLE |
| Fastener Length | 2.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 28A PRIMARY | Lake Shore Systems, Inc. (USA) |
| FFS85TYPE2STYLE10PGRADE2 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
NSN 5305-00-206-3521 is a Screw,cap,hexagon Head, manufactured by Lake Shore Systems, Inc., classified under FSC 5305 (No Item Name Available). Status: active.
NSN 5305-00-206-3521 has 2 cross-referenced part numbers: 28A (Lake Shore Systems, Inc.), FFS85TYPE2STYLE10PGRADE2 (Federal Specifications Promulgated by General Services Administration Washington DC).
There are 8 known substitutes for 5305-00-206-3521: 3455-00-021-2406, 5210-00-031-1504, 4820-00-118-5098 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 28A: Nominal Thread Diameter: 0.750 INCHES IN; Thread Length: 2.000 INCHES MAXIMUM IN; Head Style: HEXAGON; Minimum Yield Strength: 52000 POUNDS PER SQUARE INCH LBS. 18 total characteristics are documented in the Federal Logistics Information System.