The Screw,close Tolerance, cataloged under National Stock Number 5305-01-236-1680, 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 18 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-236-1680 |
| Primary Part Number | ST3M454-6L11 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.312 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.614 INCHES MINIMUM AND 0.664 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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 | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.752 INCHES MINIMUM AND 0.762 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 |
|---|---|
| 11905-6L11 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M454-6L11 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4025L6-11 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4025L6-11 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4025L6-11 | 5/9 Secondary reference U.S. Government activity |
| HT4025L6-11 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| HT4025L6-11 | 5/2 Secondary reference U.S. Government activity |
| HT4025L6-11 | 5/9 Secondary reference U.S. Government activity |
| HT4025L6-11 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M454-6L11 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-236-1680 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-236-1680 has 4 manufacturer part numbers on file: 11905-6L11 (Reid Products Inc. Dba Reid Products Inc), ST3M454-6L11 (The Boeing Company Div Defense), HT4025L6-11 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4025L6-11 (Hi-Shear Corporation).
Key specifications for ST3M454-6L11: Fastener Length: 1.312 INCHES MINIMUM AND 1.342 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.614 INCHES MINIMUM AND 0.664 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 18 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.