The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-021-2530, 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 22 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-021-2530 |
| Primary Part Number | NAS1191E04T4 |
| 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 | 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Fastener Length | 0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.169 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | MIL-F-18240 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE |
| Nominal Thread Diameter | 0.112 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 FASTENER |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | IRON ALLOY 660 FASTENER |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Thread Series Designator | UNJC |
| Head Diameter | 0.178 INCHES MINIMUM AND 0.183 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 |
|---|---|
| NAS1191E04T4 PRIMARY | Apcom Inc (USA) |
| NAS1191E04T4 PRIMARY | Huck International, Inc (USA) |
| NAS1191E04T4 | Plastic and Metal Products Corporation (USA) |
| NAS1191E04T4 PRIMARY | Long-Lok Llc (USA) |
| NAS1191E04T4 PRIMARY | Hi-Shear Corporation (USA) |
| NAS1191E04T4 PRIMARY | Nd Industries Inc Div Eastern Division (USA) |
| NAS1191E04T4 | Hardware Specialty Co. Inc. Dba Hardware Specialty Co Inc (USA) |
| NAS1191E04T4 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1191E04T4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1191E04T4 | Nor-Cal Supply Co (USA) |
| Reference | Meaning |
|---|---|
| NAS1191E04T4 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1191E04T4 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191E04T4 | 5/9 Secondary reference F and C Sales Inc |
| NAS1191E04T4 | 5/9 Secondary reference U.S. Government activity |
| NAS1191E04T4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1191E04T4 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1191E04T4 | 5/9 Secondary reference Air Industries Co Inc |
NSN 5305-01-021-2530 is a Screw,cap,socket Head, manufactured by Apcom Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-021-2530 has 10 manufacturer part numbers on file: NAS1191E04T4 (Apcom Inc), NAS1191E04T4 (Huck International, Inc), NAS1191E04T4 (Plastic and Metal Products Corporation), NAS1191E04T4 (Long-Lok Llc), NAS1191E04T4 (Hi-Shear Corporation) and 5 more.
Key specifications for NAS1191E04T4: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN; Fastener Length: 0.219 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN. 22 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.