The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-366-6583, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 15 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-366-6583 |
| Primary Part Number | HR240-3-8 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.985 INCHES MINIMUM AND 2.015 INCHES MAXIMUM IN |
| Thread Length | 0.345 INCHES NOMINAL IN |
| Material Document and Classification | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.645 INCHES MINIMUM AND 1.665 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.376 INCHES MINIMUM AND 0.385 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 |
|---|---|
| HR240-3-8 PRIMARY | Hi-Shear Corporation (USA) |
| 03A174-3-8 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| 03A174-3-8 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HR240-3-8 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| AIC1652-3-8 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| 123743-3-8 | 5/9 Secondary reference U.S. Government activity |
| SC3102-3-8 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| T009-3-8 | 5/9 Secondary reference U.S. Government activity |
| SC3102-3-8 | 5/9 Secondary reference Sps Technologies Inc |
| PBF1417-3-8 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| SLB146-3-8 | 5/9 Secondary reference Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| T009-3-8 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-01-366-6583 is a Bolt,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-366-6583 has 4 manufacturer part numbers on file: HR240-3-8 (Hi-Shear Corporation), 03A174-3-8 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), 03A174-3-8 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HR240-3-8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for HR240-3-8: Fastener Length: 1.985 INCHES MINIMUM AND 2.015 INCHES MAXIMUM IN; Thread Length: 0.345 INCHES NOMINAL IN; Material Document and Classification: AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.190 INCHES IN. 15 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.