The Screw,shoulder, cataloged under National Stock Number 5305-01-031-5105, 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 18 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-031-5105 |
| Primary Part Number | HT41UA-12 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Fastener Length | 1.203 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Shoulder Length | 0.673 INCHES MINIMUM AND 0.695 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | 3-52 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | 3-52 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.501 INCHES MINIMUM AND 0.506 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 |
|---|---|
| HT41UA-12 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HTS501-4-12 | Huck International, Inc (USA) |
| 54267-4-12 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT41UA-12 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT409A-4-12 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 54267-4-12 | 5/9 Secondary reference U.S. Government activity |
| 3M50-4-12 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT409A-4-12 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-031-5105 is a Screw,shoulder, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-031-5105 has 4 manufacturer part numbers on file: HT41UA-12 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HTS501-4-12 (Huck International, Inc), 54267-4-12 (Sps Technologies, Llc Dba PB Fasteners), HT41UA-12 (Hi-Shear Corporation).
Key specifications for HT41UA-12: Fastener Length: 1.203 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Shoulder Length: 0.673 INCHES MINIMUM AND 0.695 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: 3-52 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.264 INCHES MINIMUM AND 0.265 INCHES MAXIMUM FIRST SHOULDER IN. 18 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.