The Screw,close Tolerance, cataloged under National Stock Number 5305-01-366-2783, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 14 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-366-2783 |
| Primary Part Number | ST3M466V4L27-1 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 2.142 INCHES MINIMUM AND 2.172 INCHES MAXIMUM IN |
| Thread Length | 0.398 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE 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 | 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 95000 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) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.072 INCHES MINIMUM AND 2.098 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.390 INCHES MINIMUM AND 0.395 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 |
|---|---|
| ST3M466V4L27-1 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M466V4L27-1 | West Coast Aerospace, Inc. (USA) |
| HT4028L4-27 | Huck International, Inc (USA) |
| ST3M466V4L27-1 | Heartland Precision Fasteners Inc (USA) |
| HT4028L4-27 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M466V4L27-1 | Houston Precision Fasteners I Lp (USA) |
| ST3M466V4L27-1 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M466V4L27-1 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M466V4L27-1 | Saturn Fasteners Inc (USA) |
| 11909V4L27-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M466V4L27-1 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M466V4L27-1 | Camcar Llc Div Camcar Llc (USA) |
| HT4028L4-27 | Cmp Products (a Division of British Engines Ltd) (GBR) |
| HT4028L4-27 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4028L4-27 | 5/2 Secondary reference U.S. Government activity |
| HT4028L4-27 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4028L4-27 | 5/9 Secondary reference U.S. Government activity |
| ST3M466V4L27-1 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4028L4-27 | 5/9 Secondary reference Deutsch Co the |
NSN 5305-01-366-2783 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-366-2783 has 14 manufacturer part numbers on file: ST3M466V4L27-1 (Howmet Global Fastening Systems Inc), ST3M466V4L27-1 (West Coast Aerospace, Inc.), HT4028L4-27 (Huck International, Inc), ST3M466V4L27-1 (Heartland Precision Fasteners Inc), HT4028L4-27 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 9 more.
Key specifications for ST3M466V4L27-1: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 2.142 INCHES MINIMUM AND 2.172 INCHES MAXIMUM IN. 21 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.