The Tester,spring Resiliency, cataloged under National Stock Number 6635-01-141-6174, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. The manufacturer of record is Link Engineering Co. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6635-01-141-6174 |
| Primary Part Number | EL4-250 |
| Item Name | Tester,spring Resiliency |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Manufacturer | Link Engineering Co |
| Status | ACTIVE |
| Mounting Method | TABLE |
| Spring Type for Which Designed | TENSION |
| Torque Indicating Wrench Usage Feature | NOT INCLUDED |
| Unit Type | WEIGHING SCALE |
| Spring Travel Gage | NOT INCLUDED |
| Spring Maximum Overall Free Length Accommodated | 16.500 INCHES IN |
| Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| EL4-250 PRIMARY | Link Engineering Co (USA) |
| Reference | Meaning |
|---|---|
| R-TBD-357 | 5/9 Secondary reference The Boeing Company Div Legacy Am&m |
| PB4-250T | 5/9 Secondary reference Link Engineering Co |
NSN 6635-01-141-6174 is a Tester,spring Resiliency, manufactured by Link Engineering Co, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
NSN 6635-01-141-6174 has 1 manufacturer part number on file: EL4-250 (Link Engineering Co).
Key specifications for EL4-250: Mounting Method: TABLE; Spring Type for Which Designed: TENSION; Torque Indicating Wrench Usage Feature: NOT INCLUDED; Unit Type: WEIGHING SCALE. 7 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.