The Screw,close Tolerance, cataloged under National Stock Number 5305-01-308-4812, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-308-4812 |
| Primary Part Number | HT195-4-11 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.069 INCHES MINIMUM AND 1.116 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MAC PS13145 FSCM 76301 MFR REF ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 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 | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| HT195-4-11 | Hi-Shear Corporation (USA) |
| 3M263-4-11 | The Boeing Company Div Defense (USA) |
| HT195-4-11 | Satair A/s (DNK) |
| HT195-4-11 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT8115-4-11 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| HT8115-4-11 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-308-4812 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-308-4812 has 5 manufacturer part numbers on file: HT195-4-11 (Hi-Shear Corporation), 3M263-4-11 (The Boeing Company Div Defense), HT195-4-11 (Satair A/s), HT195-4-11 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT8115-4-11 (Fairchild Fasteners Europe - Vsd Gmbh).
Key specifications for HT195-4-11: Fastener Length: 1.069 INCHES MINIMUM AND 1.116 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MAC PS13145 FSCM 76301 MFR REF ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN; Hardness Rating: 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL. 18 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.