The Screw,close Tolerance, cataloged under National Stock Number 5305-00-040-9879, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-040-9879 |
| Primary Part Number | 53B333-40 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES OVERALL |
| Fastener Length | 2.890 INCHES MINIMUM AND 2.937 INCHES MAXIMUM IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Head Style | FLAT COUNTERSUNK |
| Grip Length | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Head Diameter | 0.329 INCHES MINIMUM AND 0.385 INCHES MAXIMUM 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 |
|---|---|
| 53B333-40 | Huck International, Inc (USA) |
| 53B333-40 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 53B333-40 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 53B333-40 | Howmet Global Fastening Systems Inc (USA) |
| 53B333-40 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 53B333-40 | Hi-Shear Corporation (USA) |
| 53B333-40 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 53B333-40 | 5/9 Secondary reference U.S. Government activity |
| 53B333-40 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 53B333-40 | 5/2 Secondary reference U.S. Government activity |
| 53B333-40 | 5/2 Secondary reference U.S. Government activity |
| 53B333-40 | 5/9 Secondary reference Deutsch Fastener Corp |
| 53B333-40 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
NSN 5305-00-040-9879 is a Screw,close Tolerance, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-040-9879 has 7 manufacturer part numbers on file: 53B333-40 (Huck International, Inc), 53B333-40 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 53B333-40 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 53B333-40 (Howmet Global Fastening Systems Inc), 53B333-40 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 2 more.
Key specifications for 53B333-40: Surface Finish: 32.0 MICROINCHES OVERALL; Fastener Length: 2.890 INCHES MINIMUM AND 2.937 INCHES MAXIMUM IN; Thread Length: 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN; Head Style: FLAT COUNTERSUNK. 9 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.