The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-229-3482, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-229-3482 |
| Primary Part Number | 3M261-5-9 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN |
| Fastener Length | 1.013 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MAC P.S. 13145, CAGE76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Material Document and Classification | 23-105, CAGE76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3112 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL 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 |
|---|---|
| HS2601-5Z-9A | Huck International, Inc (USA) |
| 3M261-5-9 PRIMARY | The Boeing Company Div Defense (USA) |
| AIC261M5-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 66051-5-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| VS2938-5-9 | 5/2 Secondary reference U.S. Government activity |
| HS2601-5Z-9A | 5/9 Secondary reference U.S. Government activity |
| 66051-5-9 | 5/9 Secondary reference Te Connectivity Corporation Dba Tyco Electronics Corporation Div Deutsch Products |
| 66051-5-9 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5306-01-229-3482 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-229-3482 has 4 manufacturer part numbers on file: HS2601-5Z-9A (Huck International, Inc), 3M261-5-9 (The Boeing Company Div Defense), AIC261M5-9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 66051-5-9 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 3M261-5-9: Head Height: 0.177 INCHES MINIMUM AND 0.197 INCHES MAXIMUM IN; Fastener Length: 1.013 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MAC P.S. 13145, CAGE76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN. 16 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.