The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-435-9102, 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 20 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-435-9102 |
| Primary Part Number | NAS191E4T6 |
| 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 |
| Head Height | 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Fastener Length | 0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.273 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1191 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PATCH OR PELLET OR STRIP THREADS |
| Surface Treatment | PASSIVATE 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 | 28 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.367 INCHES MINIMUM AND 0.375 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 |
|---|---|
| NAS191E4T6 PRIMARY | Apcom Inc (USA) |
| NAS1191E4T6 | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| NAS1191E4T6 PRIMARY | Hi-Shear Corporation (USA) |
| NAS1191E4T6 PRIMARY | Huck International, Inc (USA) |
| NAS1191E4T6 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1191E4T6 PRIMARY | Nd Industries Inc Div Eastern Division (USA) |
| NAS1191E4T6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1191E4T6 PRIMARY | Long-Lok Llc (USA) |
| NAS1191E4T6 | Plastic and Metal Products Corporation (USA) |
| NAS1191E4T6 | Nor-Cal Supply Co (USA) |
| Reference | Meaning |
|---|---|
| NAS1191E4T6 | 5/9 Secondary reference F and C Sales Inc |
| NAS1191E4T6 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1191E4T6 | 5/9 Secondary reference Air Industries Co Inc |
| NAS1191E4T6 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191E4T6 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191E4T6 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1191C4T6 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| NAS1191E4T6 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-435-9102 is a Screw,cap,socket Head, manufactured by Apcom Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-435-9102 has 10 manufacturer part numbers on file: NAS191E4T6 (Apcom Inc), NAS1191E4T6 (Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc), NAS1191E4T6 (Hi-Shear Corporation), NAS1191E4T6 (Huck International, Inc), NAS1191E4T6 (Fastener Innovation Technology, Inc. Dba F I T) and 5 more.
Key specifications for NAS191E4T6: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN; Fastener Length: 0.344 INCHES MINIMUM AND 0.375 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.