The Screw,close Tolerance, cataloged under National Stock Number 5305-00-043-0417, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Qualified Air Components Inc.. Government technical data includes 26 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-043-0417 |
| Primary Part Number | NAS1124-1H |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Qualified Air Components Inc. |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN |
| Fastener Length | 0.363 INCHES MINIMUM AND 0.393 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | ROUND |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1124 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| 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 | 28 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.060 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Head Diameter | 0.365 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 |
|---|---|
| NAS1124-1H | Nor-Cal Supply Co (USA) |
| NAS1124-1H PRIMARY | Qualified Air Components Inc. (USA) |
| NAS1124-1H PRIMARY | Hi-Shear Corporation (USA) |
| NAS1124-1H PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1124-1H PRIMARY | Huck International, Inc (USA) |
| NAS1124-1H PRIMARY | Apcom Inc (USA) |
| NAS1124-1H PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1124-1H | Plastic and Metal Products Corporation (USA) |
| Reference | Meaning |
|---|---|
| NAS1124-1H | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1124-1H | 3/2 Design control — primary reference U.S. Government activity |
| NAS1124-1H | 3/2 Design control — primary reference U.S. Government activity |
| NAS1124-1H | 5/9 Secondary reference Air Industries Co Inc |
| NAS1124-1H | 5/9 Secondary reference F and C Sales Inc |
| NAS1124-1H | 3/2 Design control — primary reference U.S. Government activity |
| NAS1124-1H | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1124-1H | 5/9 Secondary reference U.S. Government activity |
NSN 5305-00-043-0417 is a Screw,close Tolerance, manufactured by Qualified Air Components Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-00-043-0417 has 8 manufacturer part numbers on file: NAS1124-1H (Nor-Cal Supply Co), NAS1124-1H (Qualified Air Components Inc.), NAS1124-1H (Hi-Shear Corporation), NAS1124-1H (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), NAS1124-1H (Huck International, Inc) and 3 more.
Key specifications for NAS1124-1H: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM IN. 26 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.