The Screw,close Tolerance, cataloged under National Stock Number 5305-00-915-2129, 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 23 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-915-2129 |
| Primary Part Number | NAS1124-20 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Apcom 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 | 1.551 INCHES MINIMUM AND 1.581 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.316 INCHES MINIMUM 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 | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1124 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 1.250 INCHES NOMINAL 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 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.357 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 |
|---|---|
| NAS1124-20 | Plastic and Metal Products Corporation (USA) |
| NAS1124-20 | Nor-Cal Supply Co (USA) |
| NAS1124-20 PRIMARY | Apcom Inc (USA) |
| NAS1124-20 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1124-20 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1124-20 PRIMARY | Huck International, Inc (USA) |
| NAS1124-20 PRIMARY | Hi-Shear Corporation (USA) |
| NAS1124-20 PRIMARY | Qualified Air Components Inc. (USA) |
| Reference | Meaning |
|---|---|
| NAS1124-20 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1124-20 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1124-20 | 5/9 Secondary reference F and C Sales Inc |
| NAS1124-20 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1124-20 | 5/9 Secondary reference Air Industries Co Inc |
| NAS1124-20 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1124-20 | 5/9 Secondary reference U.S. Government activity |
| NAS1124-20 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-915-2129 is a Screw,close Tolerance, manufactured by Apcom Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-915-2129 has 8 manufacturer part numbers on file: NAS1124-20 (Plastic and Metal Products Corporation), NAS1124-20 (Nor-Cal Supply Co), NAS1124-20 (Apcom Inc), NAS1124-20 (Fastener Innovation Technology, Inc. Dba F I T), NAS1124-20 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 3 more.
Key specifications for NAS1124-20: 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. 23 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.