The Bolt,machine, cataloged under National Stock Number 5306-01-226-5918, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-226-5918 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.302 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN |
| Fastener Length | 1.440 INCHES MINIMUM AND 1.540 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B 633 ASSN STD SINGLE TREATMENT RESPONSE OR ASTM B454 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.286 INCHES MINIMUM AND 1.540 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.850 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 130000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1524 OR STEEL COMP 1527 OR STEEL COMP 1536 OR STEEL COMP 1541 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-S-001222G | 4/1 Identification reference U.S. Government activity |
NSN 5306-01-226-5918 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-226-5918: Head Height: 0.302 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN; Fastener Length: 1.440 INCHES MINIMUM AND 1.540 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B 633 ASSN STD SINGLE TREATMENT RESPONSE OR ASTM B454 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.286 INCHES MINIMUM AND 1.540 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.