The Screw,close Tolerance, cataloged under National Stock Number 5305-01-436-6729, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-436-6729 |
| Primary Part Number | HL453-6-5 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Fastener Length | 1.763 INCHES MINIMUM AND 1.793 INCHES MAXIMUM IN |
| Thread Length | 0.528 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.5000 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS7608 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 1.2400 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN |
| Grip Diameter | 0.5141 INCHES MINIMUM AND 0.5151 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.928 INCHES MINIMUM AND 1.016 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 |
|---|---|
| HL453-6-5 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HL453-6-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HL453-6-5 PRIMARY | Hi-Shear Corporation (USA) |
| HL453-6-5 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| HL453-6-5 | 5/2 Secondary reference U.S. Government activity |
| NAS7608A20X | 3/2 Design control — primary reference U.S. Government activity |
| HL453-6-5 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-436-6729 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-436-6729 has 4 manufacturer part numbers on file: HL453-6-5 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HL453-6-5 (Sps Technologies, Llc Dba PB Fasteners), HL453-6-5 (Hi-Shear Corporation), HL453-6-5 (Huck International, Inc).
Key specifications for HL453-6-5: Fastener Length: 1.763 INCHES MINIMUM AND 1.793 INCHES MAXIMUM IN; Thread Length: 0.528 INCHES NOMINAL IN; Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.5000 INCHES IN. 17 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.