The Screw,shoulder, cataloged under National Stock Number 5305-00-935-7579, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Controls, Inc. Div Actuation Division. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-935-7579 |
| Primary Part Number | HT41UA19 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Curtiss-Wright Controls, Inc. Div Actuation Division |
| Status | ACTIVE |
| Fastener Length | 1.640 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN |
| Shoulder Length | 1.077 INCHES MINIMUM AND 1.099 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.501 INCHES MINIMUM AND 0.506 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 |
|---|---|
| HT41UA19 PRIMARY | Curtiss-Wright Controls, Inc. Div Actuation Division (USA) |
| 3M50-4-19 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M50-4-19 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M50-4-19 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT409A4-19 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 3M50-4-19 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT409A4-19 | 5/9 Secondary reference U.S. Government activity |
| 3M50-4-19 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-935-7579 is a Screw,shoulder, manufactured by Curtiss-Wright Controls, Inc. Div Actuation Division, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-935-7579 has 6 manufacturer part numbers on file: HT41UA19 (Curtiss-Wright Controls, Inc. Div Actuation Division), 3M50-4-19 (The Boeing Company Div Defense), 3M50-4-19 (Sps Technologies, Llc Dba PB Fasteners), 3M50-4-19 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT409A4-19 (Howmet Global Fastening Systems Inc) and 1 more.
Key specifications for HT41UA19: Fastener Length: 1.640 INCHES MINIMUM AND 1.687 INCHES MAXIMUM IN; Shoulder Length: 1.077 INCHES MINIMUM AND 1.099 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM IN. 16 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.