The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-620-7629, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Afg Div. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-620-7629 |
| Primary Part Number | 16990-4C-8B |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Afg Div |
| Status | ACTIVE |
| Width Across Flats | 0.15 INCHES NOMINAL IN |
| Fastener Length | 0.50 INCHES NOMINAL IN |
| Thread Length | 0.50 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.25 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRC |
| Head Diameter | 0.480 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 16990-4C-8B PRIMARY | Sps Technologies Afg Div (USA) |
NSN 5305-01-620-7629 is a Screw,cap,socket Head, manufactured by Sps Technologies Afg Div, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-620-7629 has 1 manufacturer part number on file: 16990-4C-8B (Sps Technologies Afg Div).
Key specifications for 16990-4C-8B: Width Across Flats: 0.15 INCHES NOMINAL IN; Fastener Length: 0.50 INCHES NOMINAL IN; Thread Length: 0.50 INCHES NOMINAL IN; Nominal Thread Diameter: 0.25 INCHES IN. 13 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.