The Screw,machine, cataloged under National Stock Number 5305-00-809-0730, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-809-0730 |
| Primary Part Number | 51B334-12 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| 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 | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Internal Drive Style | TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Head Diameter | 0.507 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 | X |
| Part Number | Manufacturer |
|---|---|
| 51B334-12 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 51B334-12 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 51B334-12 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 51B334-12 | Hi-Shear Corporation (USA) |
| 51B334-12 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| 51B334-12 | 5/2 Secondary reference U.S. Government activity |
| 51B334-12 | 5/2 Secondary reference U.S. Government activity |
| 51B334-12 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
NSN 5305-00-809-0730 is a Screw,machine, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-809-0730 has 5 manufacturer part numbers on file: 51B334-12 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 51B334-12 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 51B334-12 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 51B334-12 (Hi-Shear Corporation), 51B334-12 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for 51B334-12: 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. 13 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.