The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-01-175-9138, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Aerospace Limited. Government technical data includes 9 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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-175-9138 |
| Primary Part Number | AC044057 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Meggitt Aerospace Limited |
| Status | ACTIVE |
| Flange Diameter | 1.054 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN |
| FSC Application Data | VALVE,BRAKE CONTROL |
| Flange Thickness | 0.742 INCHES MINIMUM AND 0.749 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.666 INCHES MINIMUM AND 0.673 INCHES MAXIMUM IN |
| Style Designator | PARALLEL |
| Body Inside Diameter | 0.590 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN |
| Outside Chamfer Angle in Deg | 45.0 |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| AC044057 PRIMARY | Meggitt Aerospace Limited (GBR) |
NSN 5340-01-175-9138 is a Retainer,helical Compression Spr, manufactured by Meggitt Aerospace Limited, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-175-9138 has 1 manufacturer part number on file: AC044057 (Meggitt Aerospace Limited).
Key specifications for AC044057: Flange Diameter: 1.054 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN; Overall Height: 1.082 INCHES NOMINAL IN; FSC Application Data: VALVE,BRAKE CONTROL; Flange Thickness: 0.742 INCHES MINIMUM AND 0.749 INCHES MAXIMUM IN. 9 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.