The Screw,close Tolerance, cataloged under National Stock Number 5305-01-308-8203, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 6 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-308-8203 |
| Primary Part Number | 3M939-3-3 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.013 INCHES MAXIMUM IN |
| Fastener Length | 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN |
| Thread Length | 0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FILLISTER COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | NICKEL ALLOY 718 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.2996 INCHES MINIMUM AND 0.3016 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 |
|---|---|
| HR248-3-3PX | Hi-Shear Corporation (USA) |
| GS1018-3-3 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| 3M939-3-3 PRIMARY | The Boeing Company Div Defense (USA) |
| 124894-3-3 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| SC1823-3-3 | Howmet Global Fastening Systems Inc (USA) |
| SC5087-3-3 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| VT1731-3-3 | 5/9 Secondary reference U.S. Government activity |
| PY12455-3-3 | 5/9 Secondary reference U.S. Government activity |
| HR248-3-3PX | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 124894-3-3 | 5/2 Secondary reference U.S. Government activity |
| AIC939-3-3 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
NSN 5305-01-308-8203 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-308-8203 has 6 manufacturer part numbers on file: HR248-3-3PX (Hi-Shear Corporation), GS1018-3-3 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), 3M939-3-3 (The Boeing Company Div Defense), 124894-3-3 (Sps Technologies, Llc Dba PB Fasteners), SC1823-3-3 (Howmet Global Fastening Systems Inc) and 1 more.
Key specifications for 3M939-3-3: Head Height: 0.013 INCHES MAXIMUM IN; Fastener Length: 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN; Thread Length: 0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.190 INCHES IN. 17 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.