The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-679-4278, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Fluid Handling Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-679-4278 |
| Primary Part Number | 2-170-50-400-101 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Fluid Handling Llc |
| Status | ACTIVE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Locking Feature | SELF-LOCKING LOCKING FEATURE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL FASTENER |
| Material | PLASTIC NYLON LOCKING FEATURE |
| 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 |
|---|---|
| 2-170-50-400-101 PRIMARY | Fluid Handling Llc (USA) |
| 5-144-02-024-002 PC 4 | Fluid Handling Llc (USA) |
NSN 5305-01-679-4278 is a Screw,cap,hexagon Head, manufactured by Fluid Handling Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-679-4278 has 2 manufacturer part numbers on file: 2-170-50-400-101 (Fluid Handling Llc), 5-144-02-024-002 PC 4 (Fluid Handling Llc).
Key specifications for 2-170-50-400-101: Fastener Length: 0.500 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN; Head Style: HEXAGON; Thread Direction: RIGHT-HAND. 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.