The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-494-8113, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-494-8113 |
| Primary Part Number | HP855104 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| First Step Diameter | 0.2450 INCHES NOMINAL IN |
| Material Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.1900 INCHES NOMINAL IN |
| Distance From End to First Step | 0.2150 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | QQ-S-763, CL 416 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 416 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| HP855104 PRIMARY | Tactair Fluid Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| HP855104 | 5/9 Secondary reference U.S. Government activity |
| HP1131180-1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5340-00-494-8113 is a Seat,helical Compression Spring, manufactured by Tactair Fluid Controls Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-494-8113 has 1 manufacturer part number on file: HP855104 (Tactair Fluid Controls Inc).
Key specifications for HP855104: Overall Height: 0.2800 INCHES NOMINAL IN; First Step Diameter: 0.2450 INCHES NOMINAL IN; Material Hardness Rating: 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM; End Diameter: 0.1900 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.