The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-004-6914, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Block Drug Co Inc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-004-6914 |
| Primary Part Number | NAS1191-3T5L |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Block Drug Co Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN |
| Fastener Length | 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.219 INCHES MINIMUM AND 0.312 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 | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1191 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | STRIP THREADS |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| 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 | 0.306 INCHES MINIMUM AND 0.313 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 |
|---|---|
| NAS1191-3T5L PRIMARY | Block Drug Co Inc (USA) |
| NAS1191-3T5L | Plastic and Metal Products Corporation (USA) |
| NAS1191-3T5L PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1191-3T5L PRIMARY | Huck International, Inc (USA) |
| NAS1191-3T5L PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1191-3T5L | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| NAS1191-3T5L | Nor-Cal Supply Co (USA) |
| NAS1191-3T5L PRIMARY | Apcom Inc (USA) |
| NAS1191-3T5L PRIMARY | Nd Industries Inc Div Eastern Division (USA) |
| NAS1191-3T5L PRIMARY | Hi-Shear Corporation (USA) |
| NAS1191-3T5L PRIMARY | Long-Lok Llc (USA) |
| Reference | Meaning |
|---|---|
| NAS1191-3T5L | 5/9 Secondary reference U.S. Government activity |
| NAS1191-3T5L | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191-3T5L | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191-3T5L | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1191-3T5L | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5305-01-004-6914 is a Screw,cap,socket Head, manufactured by Block Drug Co Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-004-6914 has 11 manufacturer part numbers on file: NAS1191-3T5L (Block Drug Co Inc), NAS1191-3T5L (Plastic and Metal Products Corporation), NAS1191-3T5L (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), NAS1191-3T5L (Huck International, Inc), NAS1191-3T5L (Fastener Innovation Technology, Inc. Dba F I T) and 6 more.
Key specifications for NAS1191-3T5L: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN; Fastener Length: 0.281 INCHES MINIMUM AND 0.312 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.