The Screw,close Tolerance, cataloged under National Stock Number 5305-01-494-8052, 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 15 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-494-8052 |
| Primary Part Number | HT4020-5-11 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.0878 INCHES MINIMUM AND 0.0898 INCHES MAXIMUM IN |
| Fastener Length | 1.203 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Thread Length | 0.531 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.6287 INCHES MINIMUM AND 0.6335 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 |
|---|---|
| HT4020-5-11 PRIMARY | Hi-Shear Corporation (USA) |
| HT4020-5-11 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M652C5-11D PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4020-5-11 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M652C5-11D PRIMARY | Huck International, Inc (USA) |
| ST3M652C5-11D PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| WC4020-5-11A PRIMARY | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HT4020-5-11 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M652C5-11D | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M652C5-11D | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-494-8052 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-494-8052 has 7 manufacturer part numbers on file: HT4020-5-11 (Hi-Shear Corporation), HT4020-5-11 (Sps Technologies Ltd, Tj Brooks Division), ST3M652C5-11D (Howmet Global Fastening Systems Inc), HT4020-5-11 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M652C5-11D (Huck International, Inc) and 2 more.
Key specifications for HT4020-5-11: Head Height: 0.0878 INCHES MINIMUM AND 0.0898 INCHES MAXIMUM IN; Fastener Length: 1.203 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Thread Length: 0.531 INCHES NOMINAL IN; Nominal Thread Diameter: 0.3125 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.