The Screw,close Tolerance, cataloged under National Stock Number 5305-01-568-0780, 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 15 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-568-0780 |
| Primary Part Number | ST3M454-7L20 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.925 INCHES NOMINAL IN |
| Thread Length | 0.675 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.057 INCHES NOMINAL IN |
| Grip Diameter | 0.436 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.880 INCHES MINIMUM AND 0.890 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 |
|---|---|
| 106830-7-L20 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT295-7-L20 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT8140-7-L20 | Howmet Global Fastening Systems Inc (USA) |
| ST3M454-7L20 PRIMARY | The Boeing Company Div Defense (USA) |
| HT295-7-L20 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 106830-7-L20 | 5/2 Secondary reference U.S. Government activity |
| 106830-7-L20 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-568-0780 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-568-0780 has 5 manufacturer part numbers on file: 106830-7-L20 (Sps Technologies Ltd, Tj Brooks Division), HT295-7-L20 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT8140-7-L20 (Howmet Global Fastening Systems Inc), ST3M454-7L20 (The Boeing Company Div Defense), HT295-7-L20 (Hi-Shear Corporation).
Key specifications for ST3M454-7L20: Fastener Length: 1.925 INCHES NOMINAL IN; Thread Length: 0.675 INCHES NOMINAL IN; Nominal Thread Diameter: 0.438 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.