The Screw,close Tolerance, cataloged under National Stock Number 5305-01-350-4546, 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 21 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-350-4546 |
| Primary Part Number | ST3M454-5L23 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| 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 | 1.954 INCHES MINIMUM AND 1.984 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.531 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.428 INCHES MINIMUM AND 1.448 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Color | WHITE TOP OF HEAD |
| 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 COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.625 INCHES MINIMUM AND 0.635 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 |
|---|---|
| HT4025L5-23 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M454-5L23 PRIMARY | The Boeing Company Div Defense (USA) |
| 11905-5L23 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-5L23 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4025L5-23 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4025L5-23 | 5/2 Secondary reference U.S. Government activity |
| 10113717 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4025L5-23 | 5/9 Secondary reference U.S. Government activity |
| HT4025L5-23 | 5/9 Secondary reference U.S. Government activity |
| HT4025L5-23 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4025L5-23 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5305-01-350-4546 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-350-4546 has 5 manufacturer part numbers on file: HT4025L5-23 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M454-5L23 (The Boeing Company Div Defense), 11905-5L23 (Reid Products Inc. Dba Reid Products Inc), ST3M454-5L23 (Sps Technologies Ltd, Tj Brooks Division), HT4025L5-23 (Hi-Shear Corporation).
Key specifications for ST3M454-5L23: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 1.954 INCHES MINIMUM AND 1.984 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.