The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-561-0329, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-561-0329 |
| Primary Part Number | 6D28403-P12 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory |
| Status | ACTIVE |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 6D28403-P12 PRIMARY | Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory (USA) |
| Reference | Meaning |
|---|---|
| 6D28403-P12 | 3/9 Design control — primary reference Bechtel Technical Services Inc Machinery Apparatus Opn |
NSN 5305-01-561-0329 is a Screw,cap,hexagon Head, manufactured by Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-561-0329 has 1 manufacturer part number on file: 6D28403-P12 (Fluor Marine Propulsion, Llc Dba Knolls Atomic Power Laboratory).
Key specifications for 6D28403-P12: Fastener Length: 0.750 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN; Head Style: HEXAGON; Thread Direction: RIGHT-HAND. 8 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.