The Screw,close Tolerance, cataloged under National Stock Number 5305-01-026-0836, 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 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-026-0836 |
| Primary Part Number | NAS1121-26H |
| 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 |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | ROUND |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1121 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN |
| Grip Diameter | 0.1365 INCHES MINIMUM AND 0.1375 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 Quantity Per Inch | 32 |
| Material | STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL |
| Hole Quantity | 2 |
| Thread Series Designator | UNJC |
| Hole Type | DRILLED |
| Hole Diameter | 0.038 INCHES NOMINAL 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 |
|---|---|
| NAS1121-26H PRIMARY | Apcom Inc (USA) |
| NAS1121-26H | Plastic and Metal Products Corporation (USA) |
| NAS1121-26H | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1121-26H PRIMARY | Huck International, Inc (USA) |
| NAS1121-26H PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| NAS1121-26H PRIMARY | Hi-Shear Corporation (USA) |
| NAS1121-26H PRIMARY | Qualified Air Components Inc. (USA) |
| NAS1121-26H | Nor-Cal Supply Co (USA) |
| Reference | Meaning |
|---|---|
| NAS1121-26H | 3/2 Design control — primary reference U.S. Government activity |
| NAS1121-26H | 5/9 Secondary reference U.S. Government activity |
| NAS1121-26H | 3/2 Design control — primary reference U.S. Government activity |
| NAS1121-26H | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1121-26H | 3/2 Design control — primary reference U.S. Government activity |
| NAS1121-26H | 5/9 Secondary reference F and C Sales Inc |
| NAS1121-26H | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1121-26H | 5/9 Secondary reference Air Industries Co Inc |
NSN 5305-01-026-0836 is a Screw,close Tolerance, manufactured by Apcom Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-026-0836 has 8 manufacturer part numbers on file: NAS1121-26H (Apcom Inc), NAS1121-26H (Plastic and Metal Products Corporation), NAS1121-26H (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), NAS1121-26H (Huck International, Inc), NAS1121-26H (Fastener Innovation Technology, Inc. Dba F I T) and 3 more.
Key specifications for NAS1121-26H: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Surface Treatment Document and Classification: QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.