The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-01-055-4512, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. Government technical data includes 7 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-055-4512 |
| Primary Part Number | 6750-6 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives |
| Status | ACTIVE |
| Flange Diameter | 0.880 INCHES NOMINAL IN |
| Flange Thickness | 0.030 INCHES NOMINAL IN |
| Body Outside Diameter | 0.611 INCHES NOMINAL IN |
| Style Designator | IRREGULAR |
| Casehardening Indicator | NOT CASEHARDENED |
| Surface Treatment | CADMIUM |
| 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 |
|---|---|
| 6750-6 PRIMARY | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA) |
NSN 5340-01-055-4512 is a Retainer,helical Compression Spr, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-055-4512 has 1 manufacturer part number on file: 6750-6 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-222-5866. Verify interchangeability with system specifications before substitution.
Key specifications for 6750-6: Flange Diameter: 0.880 INCHES NOMINAL IN; Overall Height: 0.530 INCHES NOMINAL IN; Flange Thickness: 0.030 INCHES NOMINAL IN; Body Outside Diameter: 0.611 INCHES NOMINAL IN. 7 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.