The Screw,close Tolerance, cataloged under National Stock Number 5305-01-074-9049, 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 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-074-9049 |
| Primary Part Number | ST3M559-5-13 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.179 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MAC PS-13145 FSCM 76301 MFR REF ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.467 INCHES NOMINAL IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Single Shear Strength | ERR-060 |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.812 INCHES NOMINAL IN |
| Grip Diameter | 0.3266 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| 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 |
|---|---|
| ST3M559-5-13 | The Boeing Company Div Defense (USA) |
| HT307-5-13 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT307-5-13 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 66908H5-13 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HS2623-52-13 | 5/9 Secondary reference U.S. Government activity |
| 66908H5-13 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-074-9049 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-074-9049 has 3 manufacturer part numbers on file: ST3M559-5-13 (The Boeing Company Div Defense), HT307-5-13 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT307-5-13 (Hi-Shear Corporation).
Key specifications for ST3M559-5-13: Fastener Length: 1.179 INCHES NOMINAL IN; Surface Treatment Document and Classification: MAC PS-13145 FSCM 76301 MFR REF ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.467 INCHES NOMINAL IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 50.0 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.