The Flux,soldering, cataloged under National Stock Number 3439-01-569-8201, is classified within Federal Supply Class 3439 (Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories) of the Metalworking Machinery (continued) group. The manufacturer of record is Kester Inc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3439-01-569-8201 |
| Primary Part Number | KESTER R276 |
| Item Name | Flux,soldering |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Manufacturer | Kester Inc |
| Status | ACTIVE |
| Precious Material | SILVER |
| Specific Metal for Which Formulated | LEADED ALLOYS |
| Physical Form | PASTE |
| Precious Material and Location | COMPONENT SILVER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| R276 | Kester Inc (USA) |
| KESTER R276 PRIMARY | Kester Inc (USA) |
NSN 3439-01-569-8201 is a Flux,soldering, manufactured by Kester Inc, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
NSN 3439-01-569-8201 has 2 manufacturer part numbers on file: R276 (Kester Inc), KESTER R276 (Kester Inc).
Key specifications for KESTER R276: Precious Material: SILVER; Specific Metal for Which Formulated: LEADED ALLOYS; Physical Form: PASTE; Special Features: SILVER GRAY PASTE, MILD ODOR; REFRIGERATE AT 0 TO 10 DEG C; STABILIZE AT ROOM TEMP BEFORE DISPENSING; NO CLEAN SOLDER PASTE FOR DISPENSING ALL TYPES OF LEADED ALLOYS; CONTAINS POLYMERIZED ROSIN, TIN, COPPER, SILVER; HAZARDOUS DISPOSAL NEEDED; NEED GOGGLES, PROTECTIVE GLOVES, WASH HANDS IMMEDIATELY; ROOM VENTILIZATION NEEDED; PRIMARY IRRITANT TO SKIN, EYES, HARMFUL IF SWALLOWED; 10/30 CC SYRINGES; FLASH PT 199 DEG F DEGC. 4 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.