The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-831-7052, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-831-7052 |
| Primary Part Number | S6165-61553-1 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Countersink Angle in Deg | 90.0 |
| First Step Diameter | 1.3750 INCHES NOMINAL IN |
| Material Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.8120 INCHES NOMINAL IN |
| Countersink Diameter | 0.4210 INCHES NOMINAL IN |
| Distance From End to First Step | 0.6230 INCHES MINIMUM AND 0.6320 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 0.0040 INCHES MINIMUM AND 0.0080 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.6820 INCHES MINIMUM AND 0.6920 INCHES MAXIMUM IN |
| Chamfer Angle in Deg | 45.0 |
| Bore Diameter | 0.3800 INCHES MINIMUM AND 0.3900 INCHES MAXIMUM IN |
| Material | STEEL |
| 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 |
|---|---|
| S6165-61553-1 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| S6165-61553-001 | 5/1 Secondary reference Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 5340-00-831-7052 is a Seat,helical Compression Spring, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-831-7052 has 1 manufacturer part number on file: S6165-61553-1 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S6165-61553-1: Overall Height: 0.6770 INCHES MINIMUM AND 0.6820 INCHES MAXIMUM IN; Countersink Angle in Deg: 90.0; First Step Diameter: 1.3750 INCHES NOMINAL IN; Material Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM. 13 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.