The Screw,shoulder, cataloged under National Stock Number 5305-01-396-4284, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Richard Manno & Company Inc.. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-396-4284 |
| Primary Part Number | 4434-416SS |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Richard Manno & Company Inc. |
| Status | ACTIVE |
| Width Across Flats | 0.125 INCHES NOMINAL IN |
| Head Height | 0.187 INCHES NOMINAL IN |
| Fastener Length | 1.251 INCHES NOMINAL IN |
| Shoulder Length | 0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 1.001 INCHES MINIMUM AND 1.003 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.250 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 416 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.375 INCHES NOMINAL 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 |
|---|---|
| 4434-416SS PRIMARY | Richard Manno & Company Inc. (USA) |
| Reference | Meaning |
|---|---|
| PZ-25 | 3/9 Design control — primary reference W. M. Berg, Inc. |
NSN 5305-01-396-4284 is a Screw,shoulder, manufactured by Richard Manno & Company Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-396-4284 has 1 manufacturer part number on file: 4434-416SS (Richard Manno & Company Inc.).
Key specifications for 4434-416SS: Width Across Flats: 0.125 INCHES NOMINAL IN; Head Height: 0.187 INCHES NOMINAL IN; Fastener Length: 1.251 INCHES NOMINAL IN; Shoulder Length: 0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM FIRST SHOULDER IN. 17 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.