The Screw Assembly,panel, cataloged under National Stock Number 5305-01-221-3020, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Support Services Corp. Government technical data includes 30 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-221-3020 |
| Primary Part Number | 583R583H02 |
| Item Name | Screw Assembly,panel |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Head Height | 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN |
| Fastener Length | 0.678 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SPRING |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 1 CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE STAND-OFF |
| Material Accommodated Thickness | 0.031 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN |
| Thread Length | 0.203 INCHES NOMINAL IN |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES PRIMARY WASHER |
| Material Document and Classification | MIL-S-5059 MIL SPEC SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| Material Document and Classification | QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE STAND-OFF |
| Material Document and Classification | QQ-W-423 FED SPEC SINGLE MATERIAL RESPONSE SPRING |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ANODIZE STAND-OFF |
| Surface Treatment | PASSIVATE PRIMARY WASHER |
| Surface Treatment | PASSIVATE FASTENER |
| Surface Treatment | PASSIVATE SECONDARY WASHER |
| Surface Treatment | PASSIVATE SPRING |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 301 SECONDARY WASHER |
| Material | STEEL COMP 302 SPRING |
| Material | IRON ALLOY 660 FASTENER |
| Material | ALUMINUM ALLOY 6061 STAND-OFF |
| 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 |
|---|---|
| FT1085-6-1-2 | Fastener Technology Corp (USA) |
| FLW7900L6-A-2.5 | Huck International, Inc. Div Huck Products Division (USA) |
| 583R583H02 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 583R583H02 | 3/9 Design control — primary reference U.S. Government activity |
| FLW7900L6-A-2.5 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-221-3020 is a Screw Assembly,panel, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-221-3020 has 3 manufacturer part numbers on file: FT1085-6-1-2 (Fastener Technology Corp), FLW7900L6-A-2.5 (Huck International, Inc. Div Huck Products Division), 583R583H02 (Northrop Grumman Support Services Corp).
Key specifications for 583R583H02: Head Height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN; Fastener Length: 0.678 INCHES MINIMUM AND 0.718 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE PRIMARY WASHER; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SECONDARY WASHER. 30 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.