PartsTable TECHNICAL DATA SHEET
AUGUST 2026Technical Data Sheet

AWSA5.8-92 BCUP-3Brazing Alloy,silver

American Welding Society, Inc. · NSN 3439-01-268-0532 · FSC 3439 · No Item Name Available
Verified by PartsTable
NSN 3439-01-268-0532 — this item is cataloged by the U.S. Government under National Stock Number 3439-01-268-0532. Primary manufacturer part number: AWSA5.8-92 BCUP-3.
Features
  • Brazing Alloy,silver — FSC 3439
  • Flux Feature: NOT INCLUDED
  • Chemical Composition Percentage: COPPER 74; SILVER 5; PHOSPHOROUS 6
  • Precious Material and Weight: 0.040 SILVER GRAINS, TROY
  • Nondefinitive Spec/std Data: BCUP-3 CLASS
  • Criticality Code Justification: ABRY
  • Precious Material and Location: INTEGRAL SILVER SILVER
  • Physical Form: ROD
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Brazing Alloy,silver, cataloged under National Stock Number 3439-01-268-0532, is classified within Federal Supply Class 3439 (No Item Name Available) of the Metalworking Machinery (continued) group. The primary manufacturer of record is American Welding Society, Inc.. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3439-01-268-0532
Primary Part NumberAWSA5.8-92 BCUP-3
Item NameBrazing Alloy,silver
FSC / FSG3439 / 34 — No Item Name Available
ManufacturerAmerican Welding Society, Inc.
StatusACTIVE
Flux FeatureNOT INCLUDED
Chemical Composition PercentageCOPPER 74; SILVER 5; PHOSPHOROUS 6
Precious Material and Weight0.040 SILVER GRAINS, TROY
Nondefinitive Spec/std DataBCUP-3 CLASS
Criticality Code JustificationABRY
Precious Material and LocationINTEGRAL SILVER SILVER
Physical FormROD
Length20.000 INCHES NOMINAL IN
Precious MaterialSILVER
Width0.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
3439-00-052-1899AWSA5.8-92 BCUP-5-0.063 INTERCHANGEABLE
Brazing Alloy,silver
American Welding Society, Inc.
3439-00-188-69823132 INTERCHANGEABLE
Brazing Alloy,copper
Alter Harry Co the Div of T E C
3439-00-188-6983 INTERCHANGEABLE
Brazing Alloy,copper
3439-00-204-2555 INTERCHANGEABLE
Brazing Alloy,copper
3439-00-224-3580AWSA5.8-92 BCUP-5 INTERCHANGEABLE
Brazing Alloy,silver
American Welding Society, Inc.
3439-00-262-4174 INTERCHANGEABLE
Brazing Alloy,copper
3439-00-262-4203 INTERCHANGEABLE
Brazing Alloy,copper
3439-00-262-4210AWSA5.8-92 BCUP-2-0.063 INTERCHANGEABLE
Brazing Alloy,copper
American Welding Society, Inc.
3439-00-262-4211AWSA5.8-92 INTERCHANGEABLE
Brazing Alloy,copper
American Welding Society, Inc.
3439-00-262-4212AWSA5.8-92 BCUP-2-0.125 INTERCHANGEABLE
Brazing Alloy,copper
American Welding Society, Inc.
Cross-Reference Index
Part NumberManufacturer
QQ-B-650 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
7795A13 Mcmaster-Carr Supply Co (USA)
AWSA5.8-92 BCUP-3 PRIMARY American Welding Society, Inc. (USA)
Related Parts
3439-00-052-1899INTERCHANGEABLE
BRAZING ALLOY,SILVER
AWSA5.8-92 BCUP-5-0.063
3439-00-188-6982INTERCHANGEABLE
BRAZING ALLOY,COPPER
3132
3439-00-188-6983INTERCHANGEABLE
BRAZING ALLOY,COPPER
3439-00-204-2555INTERCHANGEABLE
BRAZING ALLOY,COPPER
3439-00-224-3580INTERCHANGEABLE
BRAZING ALLOY,SILVER
AWSA5.8-92 BCUP-5
3439-00-262-4174INTERCHANGEABLE
BRAZING ALLOY,COPPER
3439-00-262-4203INTERCHANGEABLE
BRAZING ALLOY,COPPER
3439-00-262-4210INTERCHANGEABLE
BRAZING ALLOY,COPPER
AWSA5.8-92 BCUP-2-0.063
3439-00-262-4211INTERCHANGEABLE
BRAZING ALLOY,COPPER
AWSA5.8-92
3439-00-262-4212INTERCHANGEABLE
BRAZING ALLOY,COPPER
AWSA5.8-92 BCUP-2-0.125
3439-00-411-2338INTERCHANGEABLE
BRAZING ALLOY,SILVER

Frequently Asked Questions

What is NSN 3439-01-268-0532?

NSN 3439-01-268-0532 is a Brazing Alloy,silver, manufactured by American Welding Society, Inc., classified under FSC 3439 (No Item Name Available). Status: active.

What are the part numbers for NSN 3439-01-268-0532?

NSN 3439-01-268-0532 has 3 cross-referenced part numbers: QQ-B-650 (Federal Specifications Promulgated by General Services Administration Washington DC), 7795A13 (Mcmaster-Carr Supply Co), AWSA5.8-92 BCUP-3 (American Welding Society, Inc.).

What NSN replaces 3439-01-268-0532?

There are 11 known substitutes for 3439-01-268-0532: 3439-00-052-1899, 3439-00-188-6982, 3439-00-188-6983 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AWSA5.8-92 BCUP-3?

Key specifications for AWSA5.8-92 BCUP-3: Flux Feature: NOT INCLUDED; Chemical Composition Percentage: COPPER 74; SILVER 5; PHOSPHOROUS 6; Precious Material and Weight: 0.040 SILVER GRAINS, TROY; Nondefinitive Spec/std Data: BCUP-3 CLASS. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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