The Screw,machine, cataloged under National Stock Number 5305-01-090-4822, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-090-4822 |
| Primary Part Number | 581R277H09 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 0.437 INCHES NOMINAL IN |
| Screw Material Document and Classification | QQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.200 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 303 |
| Internal Drive Style | RECESSED TYPE I |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Head Diameter | 0.350 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| 581R277H09 | Fastener Technology Corp (USA) |
| 581R277H09 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| 581R277H09 | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| 581R277H09 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5305-01-090-4822 is a Screw,machine, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-090-4822 has 3 manufacturer part numbers on file: 581R277H09 (Fastener Technology Corp), 581R277H09 (Northrop Grumman Support Services Corp), 581R277H09 (Howmet Global Fastening Systems Inc. Div Tridair Products).
Key specifications for 581R277H09: Screw Surface Treatment: PASSIVATE; Fastener Length: 0.437 INCHES NOMINAL IN; Screw Material Document and Classification: QQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE; Thread Length: 0.200 INCHES MINIMUM IN. 15 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.