# NSN 5306-01-212-4552: Bolt, Close Tolerance

NSN 5306-01-212-4552 (also written 5306012124552; NIIN 01-212-4552) is a bolt, close tolerance in Federal Supply Class 5306, Bolts. 2 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 5306-01-212-4552 (5306012124552)
- NIIN: 01-212-4552 (012124552)
- Item name: BOLT,CLOSE TOLERANCE
- Federal Supply Class: [FSC 5306 Bolts](https://nsnexplorer.com/fsc/5306/)
- Federal Supply Group: [FSG 53](https://nsnexplorer.com/group/53/)
- Acquisition method suffix code: AMSC G: the government has a complete data package and the rights to use it. (observed 2026-10-23)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | INCHES MINIMUM 0.401 AND INCHES MAXIMUM 0.546 |
| AASB | FASTENER LENGTH | INCHES MINIMUM 3.021 AND INCHES MAXIMUM 3.041 |
| AASK | HEAD STYLE | — |
| AASU | HEAD HEIGHT | INCHES MINIMUM 0.251 AND INCHES MAXIMUM 0.266 |
| AATB | WIDTH BETWEEN FLATS | INCHES MINIMUM 0.741 AND INCHES MAXIMUM 0.752 |
| AAUM | LOCKING FEATURE | GRIP DETENT RING |
| AAUR | GRIP DIAMETER | INCHES MINIMUM 0.4982 AND INCHES MAXIMUM 0.4991 |
| AAWB | SHANK UNTHREADED HOLE DIAMETER | FIRST HOLE INCHES MINIMUM 0.106 AND INCHES MAXIMUM 0.116 |
| AHYM | NOMINAL THREAD DIAMETER | INCHES 0.500 |
| ANEE | GRIP LENGTH | INCHES MINIMUM 2.375 AND INCHES MAXIMUM 2.391 |
| CMLP | THREAD QUANTITY PER INCH | 20 |
| CQFM | HARDNESS RATING | OVERALL ROCKWELL C MINIMUM 36.0 AND ROCKWELL C MAXIMUM 41.0 |
| CRZS | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | FIRST HOLE INCHES MINIMUM 2.901 AND INCHES MAXIMUM 2.931 |
| CSYM | SURFACE FINISH | GRIP MICROINCHES 63.0 |
| CSYM | SURFACE FINISH | BEARING SURFACE OF HEAD MICROINCHES 63.0 |
| FEAT | SPECIAL FEATURES | ACTION ID 45557951 |
| MATT | MATERIAL | OVERALL STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 4130 OR STEEL COMP 6150 |
| SFTT | SURFACE TREATMENT | OVERALL CADMIUM AND CHROMATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY2,CL2 |
| THSD | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| MS27576-8-38 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MS27576-8-38 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-15 | [SPE4A623D0249/SPE4A626F428Y](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5306012124552) | BOLT, CLOSE TOLERANCE | — | $933.79 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5306012124552&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5306012124552
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- USAspending contract actions (each award above links to its record)
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/5306-01-212-4552/
JSON: https://nsnexplorer.com/api/nsn/5306-01-212-4552.json