The Screw,shoulder, cataloged under National Stock Number 5305-01-248-2095, 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 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-248-2095 |
| Primary Part Number | HT4020-5-19X |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Head Height | 0.061 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Fastener Length | 1.703 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| Shoulder Length | 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3271 INCHES MINIMUM AND 0.3276 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.531 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| 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 | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.575 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 |
|---|---|
| HT4020-5-19X PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M653C5-19D PRIMARY | The Boeing Company Div Defense (USA) |
| HT4020-5-19X PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4020-5-19X | 3/2 Design control — primary reference U.S. Government activity |
| HT4020-5-19X | 5/9 Secondary reference U.S. Government activity |
| ST3M653C5-19D | 5/2 Secondary reference U.S. Government activity |
| HT4020-5-19X | 5/9 Secondary reference U.S. Government activity |
| HT4020-5-19X | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4020-5-19X | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5305-01-248-2095 is a Screw,shoulder, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-248-2095 has 3 manufacturer part numbers on file: HT4020-5-19X (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M653C5-19D (The Boeing Company Div Defense), HT4020-5-19X (Hi-Shear Corporation).
Key specifications for HT4020-5-19X: Head Height: 0.061 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN; Fastener Length: 1.703 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN; Shoulder Length: 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.