The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-083-0776, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Long-Lok Llc. 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-083-0776 |
| Primary Part Number | NAS1189-4T42K |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Long-Lok Llc |
| 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 | 2.531 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.750 INCHES MINIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM 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 | PELLET OR STRIP THREADS |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 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 | 28 |
| Material | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 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 |
|---|---|
| NAS1189-4T42K | Nor-Cal Supply Co (USA) |
| NAS1189-4T42K PRIMARY | Long-Lok Llc (USA) |
| NAS1189-4T42K | Plastic and Metal Products Corporation (USA) |
| NAS1189-4T42K | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| NAS1189-4T42K PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1189-4T42K PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1189-4T42K PRIMARY | Hi-Shear Corporation (USA) |
| NAS1189-4T42K PRIMARY | Apcom Inc (USA) |
| NAS1189-4T42K PRIMARY | Huck International, Inc (USA) |
| NAS1189-4T42K PRIMARY | Nd Industries Inc Div Eastern Division (USA) |
| Reference | Meaning |
|---|---|
| NAS1189-4T42K | 5/9 Secondary reference F and C Sales Inc |
| NAS1189-4T42K | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1189-4T42K | 3/2 Design control — primary reference U.S. Government activity |
| NAS1189-4T42K | 3/2 Design control — primary reference U.S. Government activity |
| NAS1189-4T42K | 5/9 Secondary reference U.S. Government activity |
| NAS1189-4T42K | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1189-4T42K | 3/2 Design control — primary reference U.S. Government activity |
| NAS1189-4T42K | 5/9 Secondary reference Air Industries Co Inc |
NSN 5305-01-083-0776 is a Screw,cap,socket Head, manufactured by Long-Lok Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-083-0776 has 10 manufacturer part numbers on file: NAS1189-4T42K (Nor-Cal Supply Co), NAS1189-4T42K (Long-Lok Llc), NAS1189-4T42K (Plastic and Metal Products Corporation), NAS1189-4T42K (Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc), NAS1189-4T42K (Fastener Innovation Technology, Inc. Dba F I T) and 5 more.
Key specifications for NAS1189-4T42K: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Fastener Length: 2.531 INCHES MINIMUM AND 2.625 INCHES MAXIMUM IN. 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.