The Screw,close Tolerance, cataloged under National Stock Number 5305-01-323-2915, 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 21 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-323-2915 |
| Primary Part Number | HT4020-7-25A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings 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 | 2.203 INCHES MINIMUM AND 2.250 INCHES MAXIMUM IN |
| Thread Length | 0.657 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Color | WHITE TOP OF HEAD |
| Surface Treatment | PASSIVATE FASTENER |
| 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 | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.8812 INCHES MINIMUM AND 0.8884 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 |
|---|---|
| HT4020-7-25A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11925C7-25A | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4020-7-25A PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4020-7-25A | 3/2 Design control — primary reference U.S. Government activity |
| HT4020-7-25A | 3/2 Design control — primary reference U.S. Government activity |
| ST3M652C7-25A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 10113686 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-323-2915 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-323-2915 has 3 manufacturer part numbers on file: HT4020-7-25A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11925C7-25A (Reid Products Inc. Dba Reid Products Inc), HT4020-7-25A (Hi-Shear Corporation).
Key specifications for HT4020-7-25A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 2.203 INCHES MINIMUM AND 2.250 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.