The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-045-3019, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-045-3019 |
| Primary Part Number | HT4016-3-2Y |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.0130 INCHES NOMINAL IN |
| Fastener Length | 0.4410 INCHES MINIMUM AND 0.4880 INCHES MAXIMUM IN |
| Thread Length | 0.3310 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.1900 INCHES IN |
| Head Style | FILLISTER 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 OVERALL |
| 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 |
|---|---|
| ST3M506-3-2-1 | The Boeing Company Div Defense (USA) |
| HT4016-3-2Y PRIMARY | Hi-Shear Corporation (USA) |
| ST3M506-3-2-1 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4016-3-2Y PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4016-3-2Y | Huck International, Inc (USA) |
| ST3M506-3-2-1 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4016=3-2Y | Howmet Global Fastening Systems Inc (USA) |
| ST3M506-3-2-1 | West Coast Aerospace, Inc. (USA) |
| ST3M506-3-2-1 | Panametrics Llc (USA) |
| Reference | Meaning |
|---|---|
| HT4016-3-2Y | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4016-3-2Y | 5/2 Secondary reference U.S. Government activity |
| HT4016=3-2Y | 5/9 Secondary reference U.S. Government activity |
| HT4016-3-2Y | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-045-3019 is a Screw,cap,socket Head, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-045-3019 has 9 manufacturer part numbers on file: ST3M506-3-2-1 (The Boeing Company Div Defense), HT4016-3-2Y (Hi-Shear Corporation), ST3M506-3-2-1 (Sps Technologies Ltd, Tj Brooks Division), HT4016-3-2Y (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4016-3-2Y (Huck International, Inc) and 4 more.
Key specifications for HT4016-3-2Y: Head Height: 0.0130 INCHES NOMINAL IN; Fastener Length: 0.4410 INCHES MINIMUM AND 0.4880 INCHES MAXIMUM IN; Thread Length: 0.3310 INCHES NOMINAL IN; Nominal Thread Diameter: 0.1900 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.