The Screw,close Tolerance, cataloged under National Stock Number 5305-01-020-2849, 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 17 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-020-2849 |
| Primary Part Number | HT4036-5D20 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.702 INCHES MINIMUM AND 1.732 INCHES MAXIMUM IN |
| Thread Length | 0.467 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| 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) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.588 INCHES MINIMUM AND 1.608 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.625 INCHES MINIMUM AND 0.635 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 |
|---|---|
| HT4036-5D20 | Satair A/s (DNK) |
| HT4036-5D20 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| HT4036-5D20 PRIMARY | Hi-Shear Corporation (USA) |
| HT4036-5D20 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4036-5D20 | Huck International, Inc (USA) |
| ST3M680-5D20 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4036-5D20 | 5/9 Secondary reference U.S. Government activity |
| HT4036-5D20 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4036-5D20 | 3/2 Design control — primary reference U.S. Government activity |
| HT4036-5D20 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-020-2849 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-020-2849 has 6 manufacturer part numbers on file: HT4036-5D20 (Satair A/s), HT4036-5D20 (Fairchild Fasteners Europe - Vsd Gmbh), HT4036-5D20 (Hi-Shear Corporation), HT4036-5D20 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4036-5D20 (Huck International, Inc) and 1 more.
Key specifications for HT4036-5D20: Fastener Length: 1.702 INCHES MINIMUM AND 1.732 INCHES MAXIMUM IN; Thread Length: 0.467 INCHES NOMINAL IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN; Nominal Thread Diameter: 0.3125 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.