The Screw,shoulder, cataloged under National Stock Number 5305-01-150-6356, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Trident Maritime Systems Uk Limited. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-150-6356 |
| Primary Part Number | 20631/300.21 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Trident Maritime Systems Uk Limited |
| Status | ACTIVE |
| Head Height | 0.060 INCHES NOMINAL IN |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Shoulder Length | 0.130 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.186 INCHES MINIMUM AND 0.187 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.130 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | BS970,PT4,416541 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.110 INCHES IN |
| Head Style | PAN NO. 2 |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | SLOT |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | BA |
| Head Diameter | 0.310 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 |
|---|---|
| 20631/300.21 PRIMARY | Trident Maritime Systems Uk Limited (GBR) |
| 20631/300-21 | Meggitt (uk) Limited (GBR) |
| Reference | Meaning |
|---|---|
| 20631/300.21 | 3/9 Design control — primary reference Aeronautical & General Instruments Limited |
NSN 5305-01-150-6356 is a Screw,shoulder, manufactured by Trident Maritime Systems Uk Limited, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-150-6356 has 2 manufacturer part numbers on file: 20631/300.21 (Trident Maritime Systems Uk Limited), 20631/300-21 (Meggitt (uk) Limited).
Key specifications for 20631/300.21: Head Height: 0.060 INCHES NOMINAL IN; Fastener Length: 0.250 INCHES NOMINAL IN; Shoulder Length: 0.130 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.186 INCHES MINIMUM AND 0.187 INCHES MAXIMUM FIRST SHOULDER IN. 14 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.