The Bolt,machine, cataloged under National Stock Number 5306-01-435-3144, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-435-3144 |
| Primary Part Number | B18234B08020N |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Extended Washer Thickness | 4.8 MILLIMETERS MINIMUM MM |
| Head Height | 8.1 MILLIMETERS MAXIMUM MM |
| External Thread Tolerance Class | 6G G |
| Fastener Length | 19.6 MILLIMETERS MINIMUM AND 20.4 MILLIMETERS MAXIMUM MM |
| Surface Treatment Document and Classification | QQ-Z-325,TY2,CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 18.0 MILLIMETERS MAXIMUM MM |
| Thread Pitch in Millimeters | 1.25 |
| Thread Length | 17.7 MILLIMETERS MAXIMUM MM |
| Nominal Thread Diameter | 8.0 MILLIMETERS MM |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 9.64 MILLIMETERS MINIMUM AND 10.00 MILLIMETERS MAXIMUM MM |
| Surface Treatment | ZINC OVERALL |
| Material | STEEL PROPERTY CLASS 10.9 OVERALL |
| Thread Series Designator | M |
| 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 |
|---|---|
| B18234B08020N PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| B18234B08020N | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-435-3144 is a Bolt,machine, manufactured by The American Society of Mechanical Engineers, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-435-3144 has 1 manufacturer part number on file: B18234B08020N (The American Society of Mechanical Engineers).
Key specifications for B18234B08020N: Extended Washer Thickness: 4.8 MILLIMETERS MINIMUM MM; Head Height: 8.1 MILLIMETERS MAXIMUM MM; External Thread Tolerance Class: 6G G; Fastener Length: 19.6 MILLIMETERS MINIMUM AND 20.4 MILLIMETERS MAXIMUM MM. 15 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.