The Screw,close Tolerance, cataloged under National Stock Number 5305-00-040-4173, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-040-4173 |
| Primary Part Number | 3M263-5-17 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.513 INCHES MINIMUM AND 1.560 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MAC PS13145,76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 11050 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.625 INCHES MINIMUM AND 0.635 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 |
|---|---|
| 3M263-5-17 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M263-5-17 | Hi-Shear Corporation (USA) |
| 3M263-5-17 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 66117H5-17 | 5/2 Secondary reference U.S. Government activity |
| 66117H5-17 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 3M263-5-17 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-040-4173 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-040-4173 has 3 manufacturer part numbers on file: 3M263-5-17 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M263-5-17 (Hi-Shear Corporation), 3M263-5-17 (The Boeing Company Div Defense).
Key specifications for 3M263-5-17: Fastener Length: 1.513 INCHES MINIMUM AND 1.560 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MAC PS13145,76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.441 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.312 INCHES IN. 17 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.