The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-550-9975, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Triumph Engine Control Systems Llc. Government technical data includes 15 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 | 5305-00-550-9975 |
| Primary Part Number | 5A11818 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Triumph Engine Control Systems Llc |
| Status | ACTIVE |
| Width Across Flats | 0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN |
| Head Height | 0.158 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Fastener Length | 0.380 INCHES NOMINAL IN |
| Thread Length | 0.380 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 123000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.260 INCHES MINIMUM AND 0.270 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 |
|---|---|
| 5A11818 PRIMARY | Triumph Engine Control Systems Llc (USA) |
NSN 5305-00-550-9975 is a Screw,cap,socket Head, manufactured by Triumph Engine Control Systems Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-550-9975 has 1 manufacturer part number on file: 5A11818 (Triumph Engine Control Systems Llc).
Key specifications for 5A11818: Width Across Flats: 0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN; Head Height: 0.158 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN; Fastener Length: 0.380 INCHES NOMINAL IN; Thread Length: 0.380 INCHES NOMINAL IN. 15 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.