The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-016-7528, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-016-7528 |
| Primary Part Number | MB13-6D30 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Fastener Length | 2.259 INCHES MINIMUM AND 2.306 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MACP.S.13145,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.374 INCHES MINIMUM AND 0.441 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 08524-B-17028 MANUFACTURERS STANDARD |
| Grip Length | 1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.134 INCHES MINIMUM AND 2.191 INCHES MAXIMUM FIRST HOLE IN |
| 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 |
|---|---|
| MB13-6D30 | Satair A/s (DNK) |
| MB13-6D30 PRIMARY | Hi-Shear Corporation (USA) |
| 73992-6D30 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M561-6D30 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M561-6D30 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB13-6D30 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| ST3M561-6D30 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB13-6D30 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| AIC244-6D30 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| BM17028-6-30D | 5/9 Secondary reference U.S. Government activity |
| ST3M561-6D30 | 5/1 Secondary reference Indian Aerospace, Inc. |
| ST3M561-6D30 | 5/2 Secondary reference U.S. Government activity |
| BM17028-6-30D | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-01-016-7528 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-016-7528 has 9 manufacturer part numbers on file: MB13-6D30 (Satair A/s), MB13-6D30 (Hi-Shear Corporation), 73992-6D30 (Sps Technologies, Llc Dba PB Fasteners), ST3M561-6D30 (The Boeing Company Div Defense), ST3M561-6D30 (Sps Technologies, Llc Dba PB Fasteners) and 4 more.
Key specifications for MB13-6D30: Head Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Fastener Length: 2.259 INCHES MINIMUM AND 2.306 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MACP.S.13145,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.374 INCHES MINIMUM AND 0.441 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.