The Screw,close Tolerance, cataloged under National Stock Number 5305-00-557-8293, 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 19 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-557-8293 |
| Primary Part Number | NAS1209-9 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Apcom Inc |
| Status | ACTIVE |
| Fastener Length | 1.058 INCHES MINIMUM AND 1.088 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.486 INCHES MINIMUM AND 0.536 INCHES MAXIMUM 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 | 0.562 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.5605 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 1.087 INCHES MINIMUM AND 1.145 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 |
|---|---|
| NAS1209-9 PRIMARY | Apcom Inc (USA) |
| NAS1209-9 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1209-9 | Nor-Cal Supply Co (USA) |
| NAS1209-9 PRIMARY | Hi-Shear Corporation (USA) |
| NAS1209-9 PRIMARY | Eriks Southwest Inc Dba Montclair Enterprises (USA) |
| NAS1209-9 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| NAS1209-9 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1209-9 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1209-9 | 5/9 Secondary reference Collins Engineering Corp |
| NAS1209-9 | 5/9 Secondary reference U.S. Government activity |
| NAS1209-9 | 5/9 Secondary reference Air Industries Co Inc |
NSN 5305-00-557-8293 is a Screw,close Tolerance, manufactured by Apcom Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-557-8293 has 6 manufacturer part numbers on file: NAS1209-9 (Apcom Inc), NAS1209-9 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), NAS1209-9 (Nor-Cal Supply Co), NAS1209-9 (Hi-Shear Corporation), NAS1209-9 (Eriks Southwest Inc Dba Montclair Enterprises) and 1 more.
Key specifications for NAS1209-9: Fastener Length: 1.058 INCHES MINIMUM AND 1.088 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.486 INCHES MINIMUM AND 0.536 INCHES MAXIMUM IN; Hardness Rating: 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL. 19 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.