The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-014-5125, 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 15 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-014-5125 |
| Primary Part Number | MB61-5-14 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.326 INCHES MINIMUM AND 1.373 INCHES MAXIMUM IN |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 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 | X |
| Part Number | Manufacturer |
|---|---|
| ST3M453-5-14 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| AIC753-5-14 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB61-5-14 PRIMARY | Hi-Shear Corporation (USA) |
| BM17019-5-14 | Huck International, Inc (USA) |
| VAL23029-5-14 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB61-5-14 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M453-5-14 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| PBF1253-5-14 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11825-5-14 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| S353-5-14 | 5/9 Secondary reference U.S. Government activity |
| MA5453-5-14 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M453-5-14 | 5/2 Secondary reference U.S. Government activity |
| ST3M453-5-14 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M453-5-14 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| KS3020-5-14 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| VS3204-5-14 | 5/9 Secondary reference U.S. Government activity |
| ST3M453-5-14 | 5/9 Secondary reference Kenaloy Products Inc Sub Masco Corp |
| ST3M453-5-14 | 5/9 Secondary reference M.s. Aerospace Inc. Dba Ms Aerospace Inc |
| VS3204-5-14 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5306-01-014-5125 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-014-5125 has 9 manufacturer part numbers on file: ST3M453-5-14 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), AIC753-5-14 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), MB61-5-14 (Hi-Shear Corporation), BM17019-5-14 (Huck International, Inc), VAL23029-5-14 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 4 more.
Key specifications for MB61-5-14: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.326 INCHES MINIMUM AND 1.373 INCHES MAXIMUM IN; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.