The Screw,shoulder, cataloged under National Stock Number 5305-01-142-7209, 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 18 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-142-7209 |
| Primary Part Number | HT4049-5-12Y |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Fastener Length | 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN |
| Shoulder Length | 0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.3427 INCHES MINIMUM AND 0.3432 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.350 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| 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 | 0.625 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 |
|---|---|
| HT4049-5-12Y PRIMARY | Hi-Shear Corporation (USA) |
| 3M959-5-12 | The Boeing Company Div Defense (USA) |
| HT4049-5-12Y PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| HT4049-5-12Y | 3/2 Design control — primary reference U.S. Government activity |
| HT4049-5-12Y | 5/9 Secondary reference U.S. Government activity |
| HT4049-5-12Y | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M959-5-12 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4049-5-12Y | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-142-7209 is a Screw,shoulder, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-142-7209 has 3 manufacturer part numbers on file: HT4049-5-12Y (Hi-Shear Corporation), 3M959-5-12 (The Boeing Company Div Defense), HT4049-5-12Y (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for HT4049-5-12Y: Fastener Length: 1.110 INCHES MINIMUM AND 1.140 INCHES MAXIMUM IN; Shoulder Length: 0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Diameter: 0.3427 INCHES MINIMUM AND 0.3432 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.