The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-378-9304, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-378-9304 |
| Primary Part Number | 1771AS186-1 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Head Height | 0.627 INCHES NOMINAL IN |
| Fastener Length | 5.000 INCHES NOMINAL IN |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.740 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Quantity Per Inch | 14 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 1771AS186-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1771AS186-1 | C/1 Advisory reference — outside the item-of-supply concept In Speck Corp Dba in Speck Corp |
NSN 5305-01-378-9304 is a Screw,cap,hexagon Head, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-378-9304 has 1 manufacturer part number on file: 1771AS186-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1771AS186-1: Head Height: 0.627 INCHES NOMINAL IN; Fastener Length: 5.000 INCHES NOMINAL IN; Nominal Thread Diameter: 1.000 INCHES IN; Head Style: HEXAGON. 10 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.