# NSN 5305-01-451-3491: Screw, Shoulder

NSN 5305-01-451-3491 (also written 5305014513491; NIIN 01-451-3491) is a screw, shoulder in Federal Supply Class 5305, Screws. 7 manufacturer part numbers from 7 suppliers are on record. The government has 1 open solicitation for it.

## Identification

- NSN: 5305-01-451-3491 (5305014513491)
- NIIN: 01-451-3491 (014513491)
- Item name: SCREW,SHOULDER
- 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 2026-11-08)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASA | THREAD LENGTH | INCHES MAXIMUM 0.363 |
| AASB | FASTENER LENGTH | INCHES MINIMUM 0.910 AND INCHES MAXIMUM 0.940 |
| AASK | HEAD STYLE | — |
| AASL | HEAD DIAMETER | INCHES MINIMUM 0.258 AND INCHES MAXIMUM 0.305 |
| AATN | SHOULDER DIAMETER | FIRST SHOULDER INCHES MINIMUM 0.2037 AND INCHES MAXIMUM 0.2043 |
| AATX | SHOULDER LENGTH | FIRST SHOULDER INCHES MINIMUM 0.553 AND INCHES MAXIMUM 0.573 |
| ABQZ | INTERNAL DRIVE STYLE | — |
| AHYM | NOMINAL THREAD DIAMETER | INCHES 0.190 |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| CQBC | MINIMUM TENSILE STRENGTH | POUNDS PER SQUARE INCH 220000 |
| CQFM | HARDNESS RATING | OVERALL ROCKWELL C MINIMUM 46.0 AND ROCKWELL C MAXIMUM 50.0 |
| CRSQ | COUNTERSINK ANGLE | DEGREES MINIMUM 99.0 AND DEGREES MAXIMUM 101.0 |
| CWYB | SHOULDER SHAPE | FIRST SHOULDER ROUND |
| MATT | MATERIAL | OVERALL STEEL COMP H11 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S 6487 |
| SFTT | SURFACE TREATMENT | OVERALL CADMIUM |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL ASSN STD SINGLE TREATMENT RESPONSE NAS 672 |
| THSD | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| C7985-3D9R | 06725 | SPS TECHNOLOGIES, LLC DBA AIR INDUSTRIES COMPANY DIV AIR INDUSTRIES COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C7985-3D9R | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C7985-3D9R | 27624 | SPS TECHNOLOGIES LLC DBA PB FASTENERS DIV PB FASTENERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C7985-3D9R | 56878 | SPS TECHNOLOGIES, LLC DBA PB FASTENERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C7985-3D9R | 80539 | SPS TECHNOLOGIES, LLC DBA AEROSPACE FASTENERS GROUP DIV AEROSPACE - SANTA ANA | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C7985-3D9R | 81755 | LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C7985-3D9R | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC DIV TORRANCE OPERATIONS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE4A6-27-T-9541 | 125 | 2026-11-13 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305014513491&category=nsn) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=5305014513491&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=5305014513491
- 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/5305-01-451-3491/
JSON: https://nsnexplorer.com/api/nsn/5305-01-451-3491.json