# NSN 5305-01-016-9638: Screw, Close Tolerance

NSN 5305-01-016-9638 (also written 5305010169638; NIIN 01-016-9638) is a screw, close tolerance in Federal Supply Class 5305, Screws. 10 manufacturer part numbers from 10 suppliers are on record. The government has 1 open solicitation for it.

## Identification

- NSN: 5305-01-016-9638 (5305010169638)
- NIIN: 01-016-9638 (010169638)
- 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 2026-10-13)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | INCHES MINIMUM 0.290 AND INCHES MAXIMUM 0.357 |
| AASB | FASTENER LENGTH | INCHES MINIMUM 0.362 AND INCHES MAXIMUM 0.409 |
| AASK | HEAD STYLE | — |
| AASL | HEAD DIAMETER | INCHES MINIMUM 0.389 AND INCHES MAXIMUM 0.394 |
| AAUR | GRIP DIAMETER | INCHES MINIMUM 0.2485 AND INCHES MAXIMUM 0.2495 |
| ABQZ | INTERNAL DRIVE STYLE | — |
| AHYM | NOMINAL THREAD DIAMETER | INCHES 0.250 |
| ANEE | GRIP LENGTH | INCHES MINIMUM 0.052 AND INCHES MAXIMUM 0.072 |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| CQBC | MINIMUM TENSILE STRENGTH | POUNDS PER SQUARE INCH 180000 |
| CQFM | HARDNESS RATING | OVERALL ROCKWELL C MINIMUM 39.0 AND ROCKWELL C MAXIMUM 43.0 |
| CRSQ | COUNTERSINK ANGLE | DEGREES NOMINAL 100.0 |
| CSYM | SURFACE FINISH | GRIP MICROINCHES 32.0 |
| MATT | MATERIAL | OVERALL STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 |
| SFTT | SURFACE TREATMENT | OVERALL CADMIUM AND CHROMATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--416,TY 2,CL 2 |
| THSD | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 51B581-4-1 | 06725 | SPS TECHNOLOGIES, LLC DBA AIR INDUSTRIES COMPANY DIV AIR INDUSTRIES COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 08524 | DEUTSCH FASTENER CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 0JRC1 | NORTHROP GRUMMAN TECHNICAL SERVICES, INC. DBA DEFENSE SYSTEMS SECTOR | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 22915 | NORTHROP GRUMMAN CORP ELECTRONIC SYSTEMS DEFENSIVE SYSTEM DIV | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 27624 | SPS TECHNOLOGIES LLC DBA PB FASTENERS DIV PB FASTENERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 73197 | HI-SHEAR CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 76823 | NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN IS DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | 80539 | SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 51B581-4-1 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE4A6-27-T-3362 | 9 | 2026-10-20 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305010169638&category=nsn) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305010169638&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5305010169638
- 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/5305-01-016-9638/
JSON: https://nsnexplorer.com/api/nsn/5305-01-016-9638.json