The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-063-0283, 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 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-063-0283 |
| Primary Part Number | ST3M750-4-11K |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 1.062 INCHES MINIMUM AND 1.082 INCHES MAXIMUM IN |
| Thread Length | 0.356 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.709 INCHES MINIMUM AND 0.739 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.944 INCHES MINIMUM AND 0.964 INCHES MAXIMUM ALL HOLES 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 |
|---|---|
| ST3M750-4-11K | Hi-Shear Corporation (USA) |
| ST3M750-4-11K | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M750-4-11K | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M750-4-11K PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M750-4-11K | J M Precision Inc (USA) |
| Reference | Meaning |
|---|---|
| 121933-4-11K | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 121933-4-11K | 5/2 Secondary reference U.S. Government activity |
| ST3M750-4-11K | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-063-0283 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-063-0283 has 5 manufacturer part numbers on file: ST3M750-4-11K (Hi-Shear Corporation), ST3M750-4-11K (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M750-4-11K (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M750-4-11K (The Boeing Company Div Defense), ST3M750-4-11K (J M Precision Inc).
Key specifications for ST3M750-4-11K: Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN; Fastener Length: 1.062 INCHES MINIMUM AND 1.082 INCHES MAXIMUM IN; Thread Length: 0.356 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN. 14 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.