The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-381-0267, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-381-0267 |
| Primary Part Number | A10639.001.132CP |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| FSC Application Data | .50NPS RELIEF VALVE |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | QQ-B-637 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW MIL-STD-1330D |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | S |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| A10639.001.132CP | Naval Inventory Control Point Mechanicsburg (USA) |
| SW118 FIND 9CP | Naval Inventory Control Point Mechanicsburg (USA) |
| SW118-9CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| A10639.001.132 | 3/1 Design control — primary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| SW118 FIND 9 | 5/1 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
| SW118-9 | 5/1 Secondary reference Anderson Greenwood Lp Dba Anderson Greenwood Crosby |
NSN 5340-01-381-0267 is a Seat,helical Compression Spring, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-381-0267 has 3 manufacturer part numbers on file: A10639.001.132CP (Naval Inventory Control Point Mechanicsburg), SW118 FIND 9CP (Naval Inventory Control Point Mechanicsburg), SW118-9CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for A10639.001.132CP: FSC Application Data: .50NPS RELIEF VALVE; Criticality Code Justification: ZZZY; Material Document and Classification: QQ-B-637 FED SPEC SINGLE MATERIAL RESPONSE; Material: COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485. 5 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.