The Screw,close Tolerance, cataloged under National Stock Number 5305-01-329-9745, 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 20 specifications, cited from the U.S. Government catalog. The record lists 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-329-9745 |
| Primary Part Number | 03A225-4-15A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 1.326 INCHES MINIMUM AND 1.356 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS 4006 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.403 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 129.0 DEGREES MINIMUM AND 131.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.5026 INCHES MINIMUM AND 0.5111 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 |
|---|---|
| SC5027-4-15A | Howmet Global Fastening Systems Inc (USA) |
| AIC1700-4-15A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 03A225-4-15A | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| 03A225-4-15A | Huck International, Inc. Div Huck Products Division (USA) |
| PBF1484-4-15A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 03A225-4-15A PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| HR246-4-15A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HR246-4-15A | Hi-Shear Corporation (USA) |
| SLB212-4-15A | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| Reference | Meaning |
|---|---|
| DF33001VA-4T-15 | 5/9 Secondary reference U.S. Government activity |
| 123992-4-15A | 5/2 Secondary reference U.S. Government activity |
| 123992-4-15A | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-329-9745 is a Screw,close Tolerance, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-329-9745 has 9 manufacturer part numbers on file: SC5027-4-15A (Howmet Global Fastening Systems Inc), AIC1700-4-15A (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 03A225-4-15A (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), 03A225-4-15A (Huck International, Inc. Div Huck Products Division), PBF1484-4-15A (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 4 more.
Key specifications for 03A225-4-15A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 1.326 INCHES MINIMUM AND 1.356 INCHES MAXIMUM IN. 20 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.