The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-053-3629, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-00-053-3629 |
| Primary Part Number | 8712381 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Countersink Angle in Deg | 45.000 |
| FSC Application Data | ENGINE,GASOLINE,NONAIRCRAFT |
| First Step Diameter | 1.2800 INCHES NOMINAL IN |
| End Diameter | 0.9400 INCHES MINIMUM AND 0.9500 INCHES MAXIMUM IN |
| Countersink Diameter | 0.7540 INCHES MINIMUM AND 0.7690 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.2700 INCHES MINIMUM AND 0.2800 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Counterbore Length | 0.2850 INCHES MINIMUM AND 0.2950 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.7450 INCHES MINIMUM AND 0.7550 INCHES MAXIMUM IN |
| Bore Diameter | 0.3370 INCHES MINIMUM AND 0.3570 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 |
|---|---|
| 8712381 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2805000533629 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5340-00-053-3629 is a Seat,helical Compression Spring, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-053-3629 has 1 manufacturer part number on file: 8712381 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 8712381: Overall Height: 0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN; Countersink Angle in Deg: 45.000; FSC Application Data: ENGINE,GASOLINE,NONAIRCRAFT; First Step Diameter: 1.2800 INCHES NOMINAL IN. 11 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.