The Screw,close Tolerance, cataloged under National Stock Number 5305-01-183-8741, 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 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-183-8741 |
| Primary Part Number | HT4024L4D15 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.015 INCHES MAXIMUM IN |
| Fastener Length | 1.382 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| 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 |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 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 COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.261 INCHES MINIMUM AND 1.311 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.3898 INCHES MINIMUM AND 0.3948 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 |
|---|---|
| WC4024L4D15 | West Coast Aerospace, Inc. (USA) |
| HT4024L4D15 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11907-4DL15-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M455-4DL15-1 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M557 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4024L4D15 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M455-4DL15-1 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4024L4D15 | 3/2 Design control — primary reference U.S. Government activity |
| HT4024L4D15 | 3/2 Design control — primary reference U.S. Government activity |
| HT4024L4D15 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-183-8741 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-183-8741 has 7 manufacturer part numbers on file: WC4024L4D15 (West Coast Aerospace, Inc.), HT4024L4D15 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11907-4DL15-1 (Reid Products Inc. Dba Reid Products Inc), ST3M455-4DL15-1 (Fastener Innovation Technology, Inc. Dba F I T), ST3M557 (Fastener Innovation Technology, Inc. Dba F I T) and 2 more.
Key specifications for HT4024L4D15: Head Height: 0.015 INCHES MAXIMUM IN; Fastener Length: 1.382 INCHES MINIMUM AND 1.422 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN. 20 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.