The Screw,machine, cataloged under National Stock Number 5305-00-803-8191, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-803-8191 |
| Primary Part Number | 51B222-12H |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Head Height | 0.141 INCHES NOMINAL IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 1.066 INCHES NOMINAL IN |
| Thread Length | 0.316 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | TORQUE SET |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Head Diameter | 0.484 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 51B222-12H | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 51B222-12H | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 51B222-12H | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 51B222-12H | 5/2 Secondary reference U.S. Government activity |
| 51B222-12H | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 51B222-12H | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 51B222-12H | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 51B222-12H | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-803-8191 is a Screw,machine, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-803-8191 has 3 manufacturer part numbers on file: 51B222-12H (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 51B222-12H (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 51B222-12H (Hi-Shear Corporation).
Key specifications for 51B222-12H: Head Height: 0.141 INCHES NOMINAL IN; Screw Surface Treatment: CADMIUM; Fastener Length: 1.066 INCHES NOMINAL IN; Thread Length: 0.316 INCHES MINIMUM IN. 14 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.