The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-509-5757, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Mac Fasteners, Inc. Dba Mac Fasteners Inc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-509-5757 |
| Primary Part Number | MS14157-08030 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Mac Fasteners, Inc. Dba Mac Fasteners Inc |
| Status | ACTIVE |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | AGAV |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Surface Treatment | PAINT TOP OF HEAD |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 8740 OR STEEL COMP 4340 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 | F |
| Part Number | Manufacturer |
|---|---|
| MS14157-08030 | Mac Fasteners, Inc. Dba Mac Fasteners Inc (USA) |
| MS14157-08030 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MS14157-08030 | Aerospace Manufacturing Corporation Dba Aerospace Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| MS14157-08030 | 5/9 Secondary reference U.S. Government activity |
| MS14157-08030 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-509-5757 is a Bolt,close Tolerance, manufactured by Mac Fasteners, Inc. Dba Mac Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-509-5757 has 3 manufacturer part numbers on file: MS14157-08030 (Mac Fasteners, Inc. Dba Mac Fasteners Inc), MS14157-08030 (Fastener Innovation Technology, Inc. Dba F I T), MS14157-08030 (Aerospace Manufacturing Corporation Dba Aerospace Manufacturing Inc).
Key specifications for MS14157-08030: Hardness Rating: 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL; Criticality Code Justification: AGAV; Nominal Thread Diameter: 0.500 INCHES IN; Thread Direction: RIGHT-HAND. 10 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.