The Screw,shoulder, cataloged under National Stock Number 5305-01-396-4301, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-396-4301 |
| Primary Part Number | CTS129A-3 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.178 INCHES NOMINAL IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Shoulder Length | 0.194 INCHES MINIMUM AND 0.200 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.437 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.750 INCHES NOMINAL 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 |
|---|---|
| CTS129A-3 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| RE468320001-108 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5305-01-396-4301 is a Screw,shoulder, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-396-4301 has 1 manufacturer part number on file: CTS129A-3 (The Boeing Company Div Defense).
Key specifications for CTS129A-3: Head Height: 0.178 INCHES NOMINAL IN; Fastener Length: 1.000 INCHES NOMINAL IN; Shoulder Length: 0.194 INCHES MINIMUM AND 0.200 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.437 INCHES NOMINAL FIRST SHOULDER IN. 13 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.