The Screw,close Tolerance, cataloged under National Stock Number 5305-01-015-5225, 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 19 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-015-5225 |
| Primary Part Number | ST3M562-4D14 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.152 INCHES MINIMUM AND 1.199 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MAC PS13145,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.293 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-562 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.031 INCHES MINIMUM AND 1.088 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.497 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 |
|---|---|
| HT309-4D14 | Hi-Shear Corporation (USA) |
| 3991H-4D14 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M562-4D14 PRIMARY | The Boeing Company Div Defense (USA) |
| HT309-4D14 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| BM19031-4-14D | 5/9 Secondary reference U.S. Government activity |
| HT8177-4D14 | 5/2 Secondary reference U.S. Government activity |
| HT309-4D14 | 5/9 Secondary reference Satair A/s |
| HT8177-4D14 | 5/9 Secondary reference Fairchild Fasteners Europe - Vsd Gmbh |
| ST3M562-4D14 | 5/9 Secondary reference Harris Lifting and Shipping Tackle Co Ltd |
| HT309-4D14 | 5/9 Secondary reference Fairchild Fasteners Europe - Vsd Gmbh |
| BM19031-4-14D | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5305-01-015-5225 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-015-5225 has 4 manufacturer part numbers on file: HT309-4D14 (Hi-Shear Corporation), 3991H-4D14 (Sps Technologies, Llc Dba PB Fasteners), ST3M562-4D14 (The Boeing Company Div Defense), HT309-4D14 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for ST3M562-4D14: Fastener Length: 1.152 INCHES MINIMUM AND 1.199 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MAC PS13145,FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.293 INCHES NOMINAL IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN. 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.