The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-211-0839, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 10 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 | 5340-01-211-0839 |
| Primary Part Number | A6481.078.145 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| Status | ACTIVE |
| Countersink Angle in Deg | 30.0 |
| First Step Diameter | 2.8650 INCHES MINIMUM AND 2.8950 INCHES MAXIMUM IN |
| End Diameter | 1.5850 INCHES MINIMUM AND 1.5950 INCHES MAXIMUM IN |
| Countersink Diameter | 0.0450 INCHES MINIMUM AND 1.0750 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.4000 INCHES MINIMUM AND 0.4600 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE |
| Bore Diameter | 0.5600 INCHES MINIMUM AND 0.5750 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 |
|---|---|
| A6481.078.145 PRIMARY | Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA) |
NSN 5340-01-211-0839 is a Seat,helical Compression Spring, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-211-0839 has 1 manufacturer part number on file: A6481.078.145 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).
Key specifications for A6481.078.145: Overall Height: 0.7950 INCHES MINIMUM AND 0.8250 INCHES MAXIMUM IN; Countersink Angle in Deg: 30.0; First Step Diameter: 2.8650 INCHES MINIMUM AND 2.8950 INCHES MAXIMUM IN; End Diameter: 1.5850 INCHES MINIMUM AND 1.5950 INCHES MAXIMUM IN. 10 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.