The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-082-4618, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Leonardo S.p.a. Div Electronics. Government technical data includes 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-082-4618 |
| Primary Part Number | 843486-1 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Leonardo S.p.a. Div Electronics |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.104 INCHES NOMINAL IN |
| Head Height | 0.180 INCHES NOMINAL IN |
| Fastener Length | 0.660 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35,TYPE 4 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.370 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.154 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.167 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.181 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.104 INCHES NOMINAL IN |
| Width Between Flats | 0.312 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.138 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | TORQUE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 0.290 INCHES NOMINAL IN |
| Third Diameter From Head | 0.154 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 843486-1 | Leonardo S.p.a. Div Electronics (ITA) |
| 843486-1 | Elettronica Aster Spa (ITA) |
| 843486-1 | Hensoldt Sensors Gmbh Div Seps (DEU) |
| Reference | Meaning |
|---|---|
| 843486-1 | 5/9 Secondary reference Fiar Fabbrica Italiana Apparecchiature Radioelettriche Spa |
| 843486-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-082-4618 is a Screw,externally Relieved Body, manufactured by Leonardo S.p.a. Div Electronics, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-082-4618 has 3 manufacturer part numbers on file: 843486-1 (Leonardo S.p.a. Div Electronics), 843486-1 (Elettronica Aster Spa), 843486-1 (Hensoldt Sensors Gmbh Div Seps).
Key specifications for 843486-1: Fourth Diameter From Head: 0.104 INCHES NOMINAL IN; Head Height: 0.180 INCHES NOMINAL IN; Fastener Length: 0.660 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35,TYPE 4 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 24 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.