The Screw,close Tolerance, cataloged under National Stock Number 5305-01-552-4580, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Boeing Defence Australia Ltd. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-552-4580 |
| Primary Part Number | NAS8703U4 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Boeing Defence Australia Ltd |
| Status | ACTIVE |
| Fastener Length | 0.558 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN |
| Thread Length | 0.323 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.187 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNJC |
| Head Diameter | 0.303 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 |
|---|---|
| NAS8703U4 | Boeing Defence Australia Ltd (AUS) |
| NAS8703U4 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| NAS8703U4 | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| Reference | Meaning |
|---|---|
| NAS8703U4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-552-4580 is a Screw,close Tolerance, manufactured by Boeing Defence Australia Ltd, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-552-4580 has 3 manufacturer part numbers on file: NAS8703U4 (Boeing Defence Australia Ltd), NAS8703U4 (Boeing Defence Australia Ltd Div Defense, Space & Security), NAS8703U4 (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site).
Key specifications for NAS8703U4: Fastener Length: 0.558 INCHES MINIMUM AND 0.588 INCHES MAXIMUM IN; Thread Length: 0.323 INCHES NOMINAL IN; Nominal Thread Diameter: 0.190 INCHES IN; Head Style: FLAT COUNTERSUNK. 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.