The Screw,close Tolerance, cataloged under National Stock Number 5305-00-522-9629, 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 17 specifications, cited from the U.S. Government catalog. The record lists 16 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-522-9629 |
| Primary Part Number | ST3M454-4DL11 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.142 INCHES MINIMUM AND 1.172 INCHES MAXIMUM IN |
| Thread Length | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 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 | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.021 INCHES MINIMUM AND 1.061 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.497 INCHES MINIMUM AND 0.507 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 |
|---|---|
| ST3M454-4DL11 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 11905-4LD11 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4025L4D11 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4025L4D11 | Huck International, Inc (USA) |
| ST3M454-4DL11 | Houston Precision Fasteners I Lp (USA) |
| ST3M454-4DL11 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4025L4D11 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4025L4D11 | Howmet Global Fastening Systems Inc (USA) |
| HT4025L4D11 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M454-4DL11 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11905-4DL11 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-4DL11 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M454-4DL11 | Heartland Precision Fasteners Inc (USA) |
| HT4025L4D11 | Hi-Shear Corporation (USA) |
| HT4025L4D11 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| WC4025L-4D11 | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HT4025L4D11 | 5/9 Secondary reference U.S. Government activity |
| HT4025L4D11 | 5/2 Secondary reference U.S. Government activity |
| ST3M454-4DL11 | 5/9 Secondary reference U.S. Government activity |
| ST3M454-4LD11 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4025L4D11 | 5/9 Secondary reference U.S. Government activity |
| 10125354 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-00-522-9629 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-522-9629 has 16 manufacturer part numbers on file: ST3M454-4DL11 (Sps Technologies, Llc Dba PB Fasteners), 11905-4LD11 (Reid Products Inc. Dba Reid Products Inc), HT4025L4D11 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HT4025L4D11 (Huck International, Inc), ST3M454-4DL11 (Houston Precision Fasteners I Lp) and 11 more.
Key specifications for ST3M454-4DL11: Fastener Length: 1.142 INCHES MINIMUM AND 1.172 INCHES MAXIMUM IN; Thread Length: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN; Nominal Thread Diameter: 0.250 INCHES IN. 17 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.