The Screw,close Tolerance, cataloged under National Stock Number 5305-01-397-1784, 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 17 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-397-1784 |
| Primary Part Number | HT4068-3-18A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Fastener Length | 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMIL-C-83488, TYPE 2, CLASS 3 MIL SPEC 3RD TREATMENT RESPONSE OVERALL |
| Thread Length | 0.406 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM 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 | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.297 INCHES MINIMUM AND 0.302 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 |
|---|---|
| 3M926-3L18 | The Boeing Company Div Defense (USA) |
| HT4068-3-18A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4068-3-18A PRIMARY | Hi-Shear Corporation (USA) |
| 11883-3L18 | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M926-3L18 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M926-3L18 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| 3M926-3L18 PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| 3M926-3L18 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-397-1784 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-397-1784 has 7 manufacturer part numbers on file: 3M926-3L18 (The Boeing Company Div Defense), HT4068-3-18A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4068-3-18A (Hi-Shear Corporation), 11883-3L18 (Reid Products Inc. Dba Reid Products Inc), 3M926-3L18 (Sps Technologies, Llc Dba PB Fasteners) and 2 more.
Key specifications for HT4068-3-18A: Fastener Length: 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMIL-C-83488, TYPE 2, CLASS 3 MIL SPEC 3RD TREATMENT RESPONSE OVERALL; Thread Length: 0.406 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.190 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.