The Screw,close Tolerance, cataloged under National Stock Number 5305-01-345-2456, 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 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-345-2456 |
| Primary Part Number | ST3M466V4L20-1 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.704 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.389 INCHES MINIMUM AND 0.394 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 |
|---|---|
| ST3M466V4L20-1 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4028L4-20 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4028L4-20 | Ametek Airtechnology Group Limited (GBR) |
| HT4028L4-20 | Hi-Shear Corporation (USA) |
| 11909V4L20-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M466V4L20-1 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4028L4-20 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M466V4L20-1 | 5/2 Secondary reference U.S. Government activity |
| HT4028L4-20 | 5/9 Secondary reference U.S. Government activity |
| HT4028L4-20 | 5/2 Secondary reference U.S. Government activity |
| HT4028L4-20 | 5/9 Secondary reference U.S. Government activity |
| HT4028L4-20 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Ltd, Tj Brooks Division |
| HT4028L4-20 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 10113711 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-345-2456 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-345-2456 has 6 manufacturer part numbers on file: ST3M466V4L20-1 (Sps Technologies Ltd, Tj Brooks Division), HT4028L4-20 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4028L4-20 (Ametek Airtechnology Group Limited), HT4028L4-20 (Hi-Shear Corporation), 11909V4L20-1 (Reid Products Inc. Dba Reid Products Inc) and 1 more.
Key specifications for ST3M466V4L20-1: Fastener Length: 1.704 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN; Thread Length: 0.469 INCHES NOMINAL IN; Material Document and Classification: AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.250 INCHES 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.