The Bolt,machine, cataloged under National Stock Number 5306-01-009-6632, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-009-6632 |
| Primary Part Number | MS9491-18 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.188 INCHES NOMINAL IN |
| Fastener Length | 1.365 INCHES MINIMUM AND 1.385 INCHES MAXIMUM IN |
| Thread Length | 0.865 INCHES MINIMUM AND 0.925 INCHES MAXIMUM IN |
| Hardness Rating | 24.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.440 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 130000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 85000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 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 | X |
| Part Number | Manufacturer |
|---|---|
| MS9491-18 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS9491-18 | 3/9 Design control — primary reference U.S. Government activity |
| 5306PL1496496 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS9491-18 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-009-6632 is a Bolt,machine, manufactured by Sae International Dba Sae International, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-009-6632 has 1 manufacturer part number on file: MS9491-18 (Sae International Dba Sae International).
Key specifications for MS9491-18: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.188 INCHES NOMINAL 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.