The Screw,close Tolerance, cataloged under National Stock Number 5305-01-278-3789, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 20 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-278-3789 |
| Primary Part Number | HT4024L3-27 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.013 INCHES NOMINAL IN |
| Fastener Length | 2.079 INCHES MINIMUM AND 2.109 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.319 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.678 INCHES MINIMUM AND 1.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 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 | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.297 INCHES MINIMUM AND 0.302 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 |
|---|---|
| HT4024L3-27 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M455-3L27-1 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M455-3L27-1 | West Coast Aerospace, Inc. (USA) |
| HT4024L3-27 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M455-3L27-1 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4024L3-27 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| ST3M455-3L27-1 | 5/2 Secondary reference U.S. Government activity |
| HT4024L3-27 | 5/9 Secondary reference Cmp Products (a Division of British Engines Ltd) |
| HT4024L3-27 | 5/9 Secondary reference U.S. Government activity |
| HT4024L3-27 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4024L3-27 | 5/9 Secondary reference U.S. Government activity |
| ST3M455-3L27 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4024L3-27 | 5/9 Secondary reference Deutsch Co the |
| HT4024L3-27 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4024L3-27 | 5/2 Secondary reference U.S. Government activity |
| 10113634 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-278-3789 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-278-3789 has 6 manufacturer part numbers on file: HT4024L3-27 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M455-3L27-1 (Fastener Innovation Technology, Inc. Dba F I T), ST3M455-3L27-1 (West Coast Aerospace, Inc.), HT4024L3-27 (Sps Technologies Ltd, Tj Brooks Division), ST3M455-3L27-1 (The Boeing Company Div Defense) and 1 more.
Key specifications for HT4024L3-27: Head Height: 0.013 INCHES NOMINAL IN; Fastener Length: 2.079 INCHES MINIMUM AND 2.109 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.319 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN. 20 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.