The Screw,close Tolerance, cataloged under National Stock Number 5305-00-308-1807, 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 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-308-1807 |
| Primary Part Number | 3M123-3D3 |
| 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 | 0.578 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.070 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES MINIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.139 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 0.376 INCHES MINIMUM AND 0.381 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 |
|---|---|
| HT3N-3D | Hi-Shear Corporation (USA) |
| 3M123-3D3 PRIMARY | The Boeing Company Div Defense (USA) |
| 3M123-3D3 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M123-3D3 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT3N-3D | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| 3M123-3D3 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-308-1807 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-308-1807 has 5 manufacturer part numbers on file: HT3N-3D (Hi-Shear Corporation), 3M123-3D3 (The Boeing Company Div Defense), 3M123-3D3 (Sps Technologies, Llc Dba PB Fasteners), 3M123-3D3 (Fastener Innovation Technology, Inc. Dba F I T), HT3N-3D (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for 3M123-3D3: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 0.578 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN. 19 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.