The Screw,close Tolerance, cataloged under National Stock Number 5305-01-278-6776, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. The record lists 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 — Screws (FSG 53) |
| Manufacturers | Hi-Shear Corporation (CAGE 73197); Huck International, Inc (CAGE 17446); Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (CAGE 06725); Northrop Grumman Systems Corporation (CAGE 79U29); Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (CAGE 27624) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-278-6776 |
| Primary Part Number | 51B581-3-10 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 51B581-3-10 | Hi-Shear Corporation (USA) |
| 51B581-3-10 | Huck International, Inc (USA) |
| 51B581-3-10 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 51B581-3-10 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 51B581-3-10 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 51B581-3-10 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 51B581-3-10 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 51B581-3-10 | 5/2 Secondary reference U.S. Government activity |
| 51B581-3-10 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
NSN 5305-01-278-6776 is a Screw,close Tolerance, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-278-6776 has 6 manufacturer part numbers on file: 51B581-3-10 (Hi-Shear Corporation), 51B581-3-10 (Huck International, Inc), 51B581-3-10 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 51B581-3-10 (Northrop Grumman Systems Corporation), 51B581-3-10 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 1 more.
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.