The Screw,machine, cataloged under National Stock Number 5305-01-021-2528, 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 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-021-2528 |
| Primary Part Number | 1A20806H48 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Head Height | 0.099 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM AND CHROMATE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Screw Material Document and Classification | QQ-B-626 FED SPEC ALL MATERIAL RESPONSES |
| Thread Length | 0.438 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | PAN NO. 2 |
| Thread Direction | RIGHT-HAND |
| Screw Material | COPPER ALLOY 260 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNF |
| Head Diameter | 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES |
| 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 |
|---|---|
| 1A20806H48 | Sosco Corp (USA) |
| 1A20806H48 | Allmetal Screw Products Corp (USA) |
| 1A20806H48 | Accurate Screw Machine Corp Div Accurate Screw Machine Corporation (USA) |
| 1A20806H48 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| 1A20806H48 | Asi Design & Manufacturing, Inc. Dba a S I (USA) |
| 645A562H47 | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 1A20806H48 | 3/9 Design control — primary reference U.S. Government activity |
| SPE314D8 | C/1 Advisory reference — outside the item-of-supply concept Rolls-Royce Plc Div Defense (europe) |
| 645A562H47 | 5/9 Secondary reference U.S. Government activity |
| 331C201B1032C08 | 5/9 Secondary reference U.S. Government activity |
| 1A20806H48 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-021-2528 is a Screw,machine, manufactured by Northrop Grumman Support Services Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-021-2528 has 6 manufacturer part numbers on file: 1A20806H48 (Sosco Corp), 1A20806H48 (Allmetal Screw Products Corp), 1A20806H48 (Accurate Screw Machine Corp Div Accurate Screw Machine Corporation), 1A20806H48 (Northrop Grumman Support Services Corp), 1A20806H48 (Asi Design & Manufacturing, Inc. Dba a S I) and 1 more.
Key specifications for 1A20806H48: Head Height: 0.099 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM AND CHROMATE; Fastener Length: 0.500 INCHES NOMINAL IN; Screw Material Document and Classification: QQ-B-626 FED SPEC ALL MATERIAL RESPONSES. 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.