The Screw,close Tolerance, cataloged under National Stock Number 5305-00-522-9479, 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 15 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-522-9479 |
| Primary Part Number | HT4024L6-6 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Fastener Length | 1.001 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN |
| Thread Length | 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.510 INCHES MINIMUM AND 0.564 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 |
|---|---|
| ST3M455-6L6 | Panametrics Llc (USA) |
| ST3M455-6L6 | The Boeing Company Div Defense (USA) |
| HT4024L6-6 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4024L6-6 PRIMARY | Hi-Shear Corporation (USA) |
| HT4024L6-6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 11907-6L6 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4024L6-6 | Howmet Global Fastening Systems Inc (USA) |
| ST3M455-6L6 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| Reference | Meaning |
|---|---|
| ST3M455-6L6 | 5/2 Secondary reference U.S. Government activity |
| HT4024L6-6 | 5/9 Secondary reference U.S. Government activity |
| 4024L6-6 | 5/9 Secondary reference U.S. Government activity |
| HT4024L6-6 | 5/2 Secondary reference U.S. Government activity |
| ST3M455-6L6 | 5/9 Secondary reference Sps Technologies Inc |
| 4024L6-6 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-00-522-9479 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-522-9479 has 8 manufacturer part numbers on file: ST3M455-6L6 (Panametrics Llc), ST3M455-6L6 (The Boeing Company Div Defense), HT4024L6-6 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4024L6-6 (Hi-Shear Corporation), HT4024L6-6 (Sps Technologies, Llc Dba PB Fasteners) and 3 more.
Key specifications for HT4024L6-6: Fastener Length: 1.001 INCHES MINIMUM AND 1.031 INCHES MAXIMUM IN; Thread Length: 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.375 INCHES IN; Head Style: FLAT COUNTERSUNK. 15 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.