# NSN 5305-01-538-1828: Screw, Close Tolerance

NSN 5305-01-538-1828 (also written 5305015381828; NIIN 01-538-1828) is a screw, close tolerance in Federal Supply Class 5305, Screws. 2 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 5305-01-538-1828 (5305015381828)
- NIIN: 01-538-1828 (015381828)
- Item name: SCREW,CLOSE TOLERANCE
- Federal Supply Class: [FSC 5305 Screws](https://nsnexplorer.com/fsc/5305/)
- Federal Supply Group: [FSG 53](https://nsnexplorer.com/group/53/)
- Acquisition method suffix code: AMSC C: needs engineering source approval; other sources must qualify first. (observed 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | INCHES MINIMUM 0.380 AND INCHES MAXIMUM 0.447 |
| AASB | FASTENER LENGTH | INCHES MINIMUM 0.952 AND INCHES MAXIMUM 0.999 |
| AASK | HEAD STYLE | — |
| AASL | HEAD DIAMETER | INCHES MINIMUM 0.376 AND INCHES MAXIMUM 0.381 |
| AASU | HEAD HEIGHT | INCHES MINIMUM 0.044 AND INCHES MAXIMUM 0.046 |
| AAUR | GRIP DIAMETER | INCHES NOMINAL 0.189 |
| ABQZ | INTERNAL DRIVE STYLE | — |
| AHYM | NOMINAL THREAD DIAMETER | INCHES 0.190 |
| ANEE | GRIP LENGTH | INCHES MINIMUM 0.552 AND INCHES MAXIMUM 0.572 |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| CRSQ | COUNTERSINK ANGLE | DEGREES NOMINAL 100.0 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, CLOSE TOLERANCE-ASSEMBLED O-RING |
| FEAT | SPECIAL FEATURES | ST3M430 SERIES BOLTS ARE TO BE USED IN FUEL SEALING APPLICATION. TEMP RANGE -70DEG (F) TO +350DEG (F) GRIP AND THREAD HAVE DRY FILM LUBRICANT PER MIL-L-8937 PLUS CETYL ALCOHOL. SIMILIAR TO BUT NOT THE SAME AS NSN 5305-01-231-7413. THE -7413 DOES NOT INCLUDE DRYFILM LUBRICANT. FURNISHED WITH (1) O-RING |
| MATT | MATERIAL | OVERALL TITANIUM ALLOY UNS R56400 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE NAS 621 |
| THSD | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 110179-3-9ASM | 80539 | SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| ST3M430V3-9ASM | 76301 | THE BOEING COMPANY DIV DEFENSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305015381828&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5305015381828
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- 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/5305-01-538-1828/
JSON: https://nsnexplorer.com/api/nsn/5305-01-538-1828.json