The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-235-1527, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-235-1527 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Distance From End to First Step | 0.1880 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | ASTM A108, GRADE 1211 ASSN STD SINGLE MATERIAL RESPONSE |
| Counterbore Length | 0.0620 INCHES NOMINAL IN |
| Counterbore Diameter | 3.0000 INCHES NOMINAL IN |
| Bore Diameter | 0.2190 INCHES NOMINAL IN |
| Material | STEEL COMP 1211 |
| 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 |
| Reference | Meaning |
|---|---|
| S4824H3129386 | D/9 Drawing number reference only U.S. Government activity |
| S4824H3129386 PIECE 7 | 3/2 Design control — primary reference U.S. Government activity |
| NMP-302 PIECE 7 | 5/9 Secondary reference Kunkle Industries Inc Lonergan Valve Div |
| NMP-302 | D/9 Drawing number reference only Kunkle Industries Inc Lonergan Valve Div |
NSN 5340-01-235-1527 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-538-8174. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-01-235-1527: Overall Height: 0.4380 INCHES NOMINAL IN; Distance From End to First Step: 0.1880 INCHES NOMINAL IN; Design Type: SOLID; Style Designator: SEAT. 8 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.