The Screw,shoulder, cataloged under National Stock Number 5305-01-210-0780, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-210-0780 |
| Primary Part Number | ST3M506-3-25-1 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.878 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.305 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDERUNABLE TO DECODE |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALLUNABLE TO DECODE |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.3275 INCHES MINIMUM AND 0.3325 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 |
|---|---|
| HT4016-3-25Y | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11919-3-25-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M506-3-25-1 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4016-3-25Y | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4016-3-25Y | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4016-3-25Y | 5/9 Secondary reference U.S. Government activity |
| HT4016-3-25Y | 5/2 Secondary reference U.S. Government activity |
| HT4016-3-25Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4016-3-25Y | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-210-0780 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-210-0780 has 4 manufacturer part numbers on file: HT4016-3-25Y (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11919-3-25-1 (Reid Products Inc. Dba Reid Products Inc), ST3M506-3-25-1 (The Boeing Company Div Defense), HT4016-3-25Y (Hi-Shear Corporation).
Key specifications for ST3M506-3-25-1: Fastener Length: 1.878 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN; Shoulder Diameter: 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 0.305 INCHES MINIMUM AND 0.355 INCHES MAXIMUM IN; Shoulder Shape: ROUND FIRST SHOULDERUNABLE TO DECODE. 14 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.