The Screw,close Tolerance, cataloged under National Stock Number 5305-00-883-6492, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-883-6492 |
| Primary Part Number | NAS1204-28 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Fastener Length | 2.057 INCHES MINIMUM AND 2.081 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES 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 |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Departure From Cited Designator | AS MOD BY SPECIAL FEATURES |
| Specification/standard Data | 80205-NAS1204 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 1.740 INCHES MINIMUM AND 1.760 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 | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.449 INCHES MINIMUM AND 0.507 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 |
|---|---|
| NAS1204-28 | Nor-Cal Supply Co (USA) |
| NAS1204-28 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS1204-28 PRIMARY | Eriks Southwest Inc Dba Montclair Enterprises (USA) |
| NAS1204-28 PRIMARY | Hi-Shear Corporation (USA) |
| NAS1204-28 PRIMARY | Apcom Inc (USA) |
| Reference | Meaning |
|---|---|
| NAS1204-28 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| NAS1204-28 | 5/9 Secondary reference U.S. Government activity |
| NAS1204-28 | 5/9 Secondary reference Lawrence Engineering and Supply Inc |
| NAS1204-28 | 5/9 Secondary reference Air Industries Co Inc |
| NAS1204-28 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1204-28 | 3/2 Design control — primary reference U.S. Government activity |
| NAS1204-28 | 5/9 Secondary reference F and C Sales Inc |
| NAS1204-28 | 5/9 Secondary reference Collins Engineering Corp |
NSN 5305-00-883-6492 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-883-6492 has 5 manufacturer part numbers on file: NAS1204-28 (Nor-Cal Supply Co), NAS1204-28 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), NAS1204-28 (Eriks Southwest Inc Dba Montclair Enterprises), NAS1204-28 (Hi-Shear Corporation), NAS1204-28 (Apcom Inc).
Key specifications for NAS1204-28: Fastener Length: 2.057 INCHES MINIMUM AND 2.081 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES 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. 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.