The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-411-3857, 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 10 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through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-411-3857 |
| Primary Part Number | ST3M744-4D24 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Special Test Features | MATERIAL PER AMS 5629, STEEL CORROSION RESISTANT, BARS, FORGINGS, RINGS AND EXTRUSIONS, 13CR 8.0NI 2.2MO 1.1 AL, VACUUM INDUCTION PLUS CONSUMABLE ELECTRODE MELTED, SOLUTION HEAT TREATED, PRECIPATION HARDENABLE |
| Criticality Code Justification | FEAT |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Grip Length | 0.250 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| ST3M744-4D24 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M744-4D24 | The Boeing Company Div Services (USA) |
| PBF1265-4D24 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| ST3M744-4D24 | 5/9 Secondary reference Fastener Innovation Technology, Inc. Dba F I T |
| S406-4D24 | 5/9 Secondary reference Huck International, Inc |
| VCG0001-4D24 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| 122895-4D24 | 5/9 Secondary reference Sps Technologies Inc |
| VS3174-4D24 | 5/9 Secondary reference U.S. Government activity |
| AIC687-4D24 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| 10356409 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| VS3174-4D24 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 122895-4D24 | 5/9 Secondary reference U.S. Government activity |
| ST3M744-4D24 | 5/9 Secondary reference Heartland Precision Fasteners Inc |
| GS1015-4D24 | 5/9 Secondary reference B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace |
| S406-4D24 | 5/9 Secondary reference U.S. Government activity |
| MB154-4D24 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5306-01-411-3857 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-411-3857 has 3 manufacturer part numbers on file: ST3M744-4D24 (The Boeing Company Div Defense), ST3M744-4D24 (The Boeing Company Div Services), PBF1265-4D24 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners).
Key specifications for ST3M744-4D24: Head Height: 0.164 INCHES NOMINAL IN; Special Test Features: MATERIAL PER AMS 5629, STEEL CORROSION RESISTANT, BARS, FORGINGS, RINGS AND EXTRUSIONS, 13CR 8.0NI 2.2MO 1.1 AL, VACUUM INDUCTION PLUS CONSUMABLE ELECTRODE MELTED, SOLUTION HEAT TREATED, PRECIPATION HARDENABLE; Criticality Code Justification: FEAT; Nominal Thread Diameter: 0.2500 INCHES IN. 10 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.