The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-495-4541, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is United Fasteners Nsw Pty Ltd. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-495-4541 |
| Primary Part Number | 16X50M12.9ZPSCS |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | United Fasteners Nsw Pty Ltd |
| Status | ACTIVE |
| Width Across Flats | 14.03 MILLIMETERS MINIMUM AND 14.16 MILLIMETERS MAXIMUM MM |
| Head Height | 15.76 MILLIMETERS MINIMUM AND 16.00 MILLIMETERS MAXIMUM MM |
| External Thread Tolerance Class | 4G6G |
| Fastener Length | 50.0 MILLIMETERS NOMINAL MM |
| Surface Treatment Document and Classification | ASTM B633,FE/ZN5,TY 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Pitch in Millimeters | 2.0 |
| Thread Length | 50.0 MILLIMETERS NOMINAL MM |
| Nominal Thread Diameter | 16.0 MILLIMETERS MM |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Material | STEEL PROPERTY CLASS 12.9 OVERALL |
| Thread Series Designator | M |
| Head Diameter | 23.58 MILLIMETERS MINIMUM AND 24.00 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 16X50M12.9ZPSCS | United Fasteners Nsw Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| B1831BH160050N | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-495-4541 is a Screw,cap,socket Head, manufactured by United Fasteners Nsw Pty Ltd, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-495-4541 has 1 manufacturer part number on file: 16X50M12.9ZPSCS (United Fasteners Nsw Pty Ltd).
Key specifications for 16X50M12.9ZPSCS: Width Across Flats: 14.03 MILLIMETERS MINIMUM AND 14.16 MILLIMETERS MAXIMUM MM; Head Height: 15.76 MILLIMETERS MINIMUM AND 16.00 MILLIMETERS MAXIMUM MM; External Thread Tolerance Class: 4G6G; Fastener Length: 50.0 MILLIMETERS NOMINAL MM. 15 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.