The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-020-9569, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Apcom Inc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-020-9569 |
| Primary Part Number | NAS1189-4P9 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Apcom Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Fastener Length | 0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.354 INCHES MINIMUM AND 0.456 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1189 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PATCH OR STRIP THREADS |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.442 INCHES MINIMUM AND 0.507 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 |
|---|---|
| NAS1189-4P9 PRIMARY | Apcom Inc (USA) |
| NAS1189-4P9 PRIMARY | Hi-Shear Corporation (USA) |
| NAS1189-4P9 PRIMARY | Long-Lok Llc (USA) |
| NAS1189-4P9 PRIMARY | Huck International, Inc (USA) |
| NAS1189-4P9 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1189-4P9 | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| NAS1189-4P9 PRIMARY | Nd Industries Inc Div Eastern Division (USA) |
| NAS1189-4P9 | Plastic and Metal Products Corporation (USA) |
| NAS1189-4P9 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1189-4P9 | Nor-Cal Supply Co (USA) |
| Reference | Meaning |
|---|---|
| NAS1189-4P9 | 5/9 Secondary reference U.S. Government activity |
| NAS1189-4P9 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1189-4P9 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1189-4P9 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| LK1189-4P9 | 5/9 Secondary reference Torkon Fastener Corp |
| 5305PL2215077 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| NAS1189-4P9 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1189-4P9 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1189-4P9 | 5/9 Secondary reference Air Industries Co Inc |
| NAS1189-4P9 | 5/9 Secondary reference F and C Sales Inc |
NSN 5305-01-020-9569 is a Screw,cap,socket Head, manufactured by Apcom Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-020-9569 has 10 manufacturer part numbers on file: NAS1189-4P9 (Apcom Inc), NAS1189-4P9 (Hi-Shear Corporation), NAS1189-4P9 (Long-Lok Llc), NAS1189-4P9 (Huck International, Inc), NAS1189-4P9 (Fastener Innovation Technology, Inc. Dba F I T) and 5 more.
Key specifications for NAS1189-4P9: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 0.531 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 21 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.