The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-180-0637, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Fairbanks Morse, Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-180-0637 |
| Primary Part Number | P424635 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Fairbanks Morse, Llc |
| Status | ACTIVE |
| End Diameter | 1.9600 INCHES NOMINAL IN |
| Second End Diameter | 2.2800 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | AISI 1045 ASSN STD SINGLE MATERIAL RESPONSE |
| Second Step Diameter | 4.3300 INCHES NOMINAL IN |
| Bore Taper in Deg | 7.0 |
| Spherical Seat Top Radius | 0.0800 INCHES NOMINAL IN |
| Bore Diameter | 1.2580 INCHES NOMINAL IN |
| Material | STEEL COMP 1045 |
| 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 |
|---|---|
| P424635 | Fairbanks Morse, Llc (USA) |
| Reference | Meaning |
|---|---|
| P424635 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5340-01-180-0637 is a Seat,helical Compression Spring, manufactured by Fairbanks Morse, Llc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-180-0637 has 1 manufacturer part number on file: P424635 (Fairbanks Morse, Llc).
Key specifications for P424635: Overall Height: 3.3900 INCHES NOMINAL IN; End Diameter: 1.9600 INCHES NOMINAL IN; Second End Diameter: 2.2800 INCHES NOMINAL IN; Design Type: SOLID. 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.