The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-144-1638, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-144-1638 |
| Primary Part Number | ST3M833V12T46 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.351 INCHES NOMINAL IN |
| Fastener Length | 3.979 INCHES NOMINAL IN |
| Thread Length | 1.104 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.875 INCHES MAXIMUM IN |
| Width Between Flats | 1.052 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN |
| Grip Diameter | 0.7485 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.315 INCHES NOMINAL FIRST HOLE 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 |
|---|---|
| ST3M833V12T46 PRIMARY | The Boeing Company Div Defense (USA) |
| LB52T12-46 | Hi-Shear Corporation (USA) |
| LB52T12-46 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| ST3M714-4-10 | 5/9 Secondary reference Hi-Shear Corporation |
| 10115997 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| LB46-12-46 | 5/9 Secondary reference Hi-Shear Corporation |
| ST3M833V12-46 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5306-01-144-1638 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-144-1638 has 3 manufacturer part numbers on file: ST3M833V12T46 (The Boeing Company Div Defense), LB52T12-46 (Hi-Shear Corporation), LB52T12-46 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-146-6140. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M833V12T46: Head Height: 0.351 INCHES NOMINAL IN; Fastener Length: 3.979 INCHES NOMINAL IN; Thread Length: 1.104 INCHES NOMINAL IN; Shank Unthreaded Hole Diameter: 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE IN. 16 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.