The Screw,shoulder, cataloged under National Stock Number 5305-00-419-4502, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 23 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-419-4502 |
| Primary Part Number | S6143-10111-14 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Head Height | 0.122 INCHES NOMINAL IN |
| Fastener Length | 3.938 INCHES NOMINAL IN |
| Shoulder Length | 0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Length | 2.750 INCHES NOMINAL SECOND SHOULDER IN |
| Surface Treatment Document and Classification | SS8414 FSCM 78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.748 INCHES MINIMUM AND 0.749 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 0.811 INCHES MINIMUM AND 0.812 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.437 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND ALL SHOULDERS |
| Hardness Rating | 54.0 ROCKWELL C MINIMUM AND 58.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.106 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | PAN NO. 2 |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | NICKEL OVERALL |
| Minimum Tensile Strength | 200000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 630 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.751 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 0.970 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 |
|---|---|
| S6143-10111-14 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5305-00-419-4502 is a Screw,shoulder, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-419-4502 has 1 manufacturer part number on file: S6143-10111-14 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S6143-10111-14: Head Height: 0.122 INCHES NOMINAL IN; Fastener Length: 3.938 INCHES NOMINAL IN; Shoulder Length: 0.750 INCHES MINIMUM AND 0.752 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Length: 2.750 INCHES NOMINAL SECOND SHOULDER IN. 23 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.