The Screw,close Tolerance, cataloged under National Stock Number 5305-01-083-9573, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-083-9573 |
| Primary Part Number | HT4020-3-9A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN |
| Fastener Length | 0.952 INCHES MINIMUM AND 0.999 INCHES MAXIMUM IN |
| Thread Length | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Material Document and Classification | 23-112,TYB FSC-76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.377 INCHES MINIMUM AND 0.381 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 |
|---|---|
| HT4020-3-9A | Huck International, Inc (USA) |
| WC4020-3-9A | West Coast Aerospace, Inc. (USA) |
| ST3M652C3-9A | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4020-3-9A | Howmet Global Fastening Systems Inc (USA) |
| HT4020-3-9A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4020-3-9A | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4020-3-9A | 3/2 Design control — primary reference U.S. Government activity |
| HT4020-3-9A | 5/9 Secondary reference U.S. Government activity |
| HT4020-3-9A | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M652C3-9A | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4020-3-9A | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-083-9573 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-083-9573 has 6 manufacturer part numbers on file: HT4020-3-9A (Huck International, Inc), WC4020-3-9A (West Coast Aerospace, Inc.), ST3M652C3-9A (Fastener Innovation Technology, Inc. Dba F I T), HT4020-3-9A (Howmet Global Fastening Systems Inc), HT4020-3-9A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 1 more.
Key specifications for HT4020-3-9A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM IN; Fastener Length: 0.952 INCHES MINIMUM AND 0.999 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.