The Screw,close Tolerance, cataloged under National Stock Number 5305-01-076-6316, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 22 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-076-6316 |
| Primary Part Number | HT4020-3-8A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Head Height | 0.0439 INCHES MINIMUM AND 0.0459 INCHES MAXIMUM IN |
| Fastener Length | 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.390 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | MIL-R-25988 TY 1,CL 1,GRADE 70 MIL SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | O RING |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.500 INCHES NOMINAL IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE FASTENER |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING FASTENER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.3765 INCHES MINIMUM AND 0.3813 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 |
|---|---|
| HT4020-3-8A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11925C3-8A | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4020-3-8A | Hi-Shear Corporation (USA) |
| HT4020-3-8A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M652C3-8A PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4020-3-8A | 5/9 Secondary reference U.S. Government activity |
| HT4020-3-8A | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4020-3-8A | 5/9 Secondary reference U.S. Government activity |
| CHT4020-3-8A | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| CHT4020-3-8A | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 642AS0738 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| HT4020-3-8A | 5/2 Secondary reference U.S. Government activity |
| HT4020-3-8A | 7/2 Vendor item drawing reference Huck International, Inc |
| CHT4020-3-8A | C/1 Advisory reference — outside the item-of-supply concept Deutsch Co the |
| 642AS0738-1 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 5305-01-076-6316 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-076-6316 has 5 manufacturer part numbers on file: HT4020-3-8A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11925C3-8A (Reid Products Inc. Dba Reid Products Inc), HT4020-3-8A (Hi-Shear Corporation), HT4020-3-8A (Howmet Global Fastening Systems Inc), ST3M652C3-8A (The Boeing Company Div Defense).
Key specifications for HT4020-3-8A: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Head Height: 0.0439 INCHES MINIMUM AND 0.0459 INCHES MAXIMUM IN; Fastener Length: 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN. 22 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.