The Screw,close Tolerance, cataloged under National Stock Number 5305-01-196-5578, 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 7 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-196-5578 |
| Primary Part Number | ST3M794V3-13A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.0800 INCHES MINIMUM AND 0.0820 INCHES MAXIMUM IN |
| Fastener Length | 1.203 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Thread Length | 0.381 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4967 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL V |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.4625 INCHES MINIMUM AND 0.4676 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 |
|---|---|
| ST3M794V3-13A PRIMARY | The Boeing Company Div Defense (USA) |
| HT353P3-13 | Hi-Shear Corporation (USA) |
| HT353P3-13 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M794V-3-13A | Hi-Shear Corporation (USA) |
| ST3M794V-3-13A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M794V-3-13A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M794V3-13A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| Reference | Meaning |
|---|---|
| HT4058-3-13A | 5/9 Secondary reference U.S. Government activity |
| HT4058-3-13A | 5/9 Secondary reference U.S. Government activity |
| ST3M794V3-13A | 5/9 Secondary reference U.S. Government activity |
| HT4058-3-13A | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4058-3-13A | 5/2 Secondary reference U.S. Government activity |
| HT4058-3-13A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4058-3-13A | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5305-01-196-5578 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-196-5578 has 7 manufacturer part numbers on file: ST3M794V3-13A (The Boeing Company Div Defense), HT353P3-13 (Hi-Shear Corporation), HT353P3-13 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M794V-3-13A (Hi-Shear Corporation), ST3M794V-3-13A (Sps Technologies, Llc Dba PB Fasteners) and 2 more.
Key specifications for ST3M794V3-13A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.0800 INCHES MINIMUM AND 0.0820 INCHES MAXIMUM 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.