The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-217-3201, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-217-3201 |
| Primary Part Number | 736353 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| FSC Application Data | VALVE,SHUTOFF,APU |
| First Step Diameter | 3.2750 INCHES MINIMUM AND 3.3150 INCHES MAXIMUM IN |
| End Diameter | 1.4040 INCHES MINIMUM AND 1.4640 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN |
| Supplementary Features | USE WITH VALVE P/N 736633,FSCM 99167,FSC 4810 AND P/N 736262,NSN 4810-01-165-5918 |
| Style Designator | SEAT |
| Counterbore Length | 0.9850 INCHES MINIMUM AND 1.0150 INCHES MAXIMUM IN |
| Counterbore Diameter | 1.3440 INCHES MINIMUM AND 1.4040 INCHES MAXIMUM IN |
| Distance From Center to Beginning of Ridge | 1.4060 INCHES NOMINAL IN |
| Bore Diameter | 0.3230 INCHES MINIMUM AND 3.3330 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 736353 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 736353 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-217-3201 is a Seat,helical Compression Spring, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-217-3201 has 1 manufacturer part number on file: 736353 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 736353: Overall Height: 1.0470 INCHES MINIMUM AND 1.0770 INCHES MAXIMUM IN; FSC Application Data: VALVE,SHUTOFF,APU; First Step Diameter: 3.2750 INCHES MINIMUM AND 3.3150 INCHES MAXIMUM IN; End Diameter: 1.4040 INCHES MINIMUM AND 1.4640 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.