The Screw,shoulder, cataloged under National Stock Number 5305-01-221-7236, 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 16 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-221-7236 |
| Primary Part Number | HT4078-3-12A |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.140 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN |
| Shoulder Length | 0.750 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.390 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.4625 INCHES MINIMUM AND 0.4672 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 |
|---|---|
| 3M1082V3-12A | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4078-3-12A PRIMARY | Hi-Shear Corporation (USA) |
| HT4078-3-12A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1082V3-12A PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4078-3-12A | 3/2 Design control — primary reference U.S. Government activity |
| HT4078-3-12A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4078-3-12A | 3/2 Design control — primary reference U.S. Government activity |
| HT4078-3-12A | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4078-3-12A | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-221-7236 is a Screw,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-221-7236 has 4 manufacturer part numbers on file: 3M1082V3-12A (Sps Technologies, Llc Dba PB Fasteners), HT4078-3-12A (Hi-Shear Corporation), HT4078-3-12A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M1082V3-12A (The Boeing Company Div Defense).
Key specifications for HT4078-3-12A: Fastener Length: 1.140 INCHES MINIMUM AND 1.187 INCHES MAXIMUM IN; Shoulder Length: 0.750 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.2177 INCHES MINIMUM AND 0.2182 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 0.390 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN. 16 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.