The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-243-9412, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-243-9412 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 2.1 MILLIMETERS MINIMUM AND 2.4 MILLIMETERS MAXIMUM MM |
| Head Height | 8.5 MILLIMETERS MINIMUM AND 9.0 MILLIMETERS MAXIMUM MM |
| External Thread Tolerance Class | 4H6H |
| Fastener Length | 22.20 MILLIMETERS MINIMUM AND 22.80 MILLIMETERS MAXIMUM MM |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 14.8 MILLIMETERS MAXIMUM MM |
| Thread Pitch in Millimeters | 1.0 |
| Thread Length | 16.0 MILLIMETERS MINIMUM AND 17.0 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | ROUND LONGITUDINAL HOLE |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 8.0 MILLIMETERS MM |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NA0058 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 5.80 MILLIMETERS MINIMUM AND 6.20 MILLIMETERS MAXIMUM MM |
| Grip Diameter | 7.9620 MILLIMETERS MINIMUM AND 7.9870 MILLIMETERS MAXIMUM MM |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 1250 MEGAPASCALS |
| Material | STEEL COMP E4340 OR STEEL COMP 8740 OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | MJ |
| Hole Type | DRILLED |
| Hole Diameter | 1.40 MILLIMETERS MINIMUM AND 1.54 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| NA0058H-080006 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-243-9412 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-243-9412: Extended Washer Thickness: 2.1 MILLIMETERS MINIMUM AND 2.4 MILLIMETERS MAXIMUM MM; Head Height: 8.5 MILLIMETERS MINIMUM AND 9.0 MILLIMETERS MAXIMUM MM; External Thread Tolerance Class: 4H6H; Fastener Length: 22.20 MILLIMETERS MINIMUM AND 22.80 MILLIMETERS MAXIMUM MM. 24 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.