PartsTable TECHNICAL DATA SHEET
AUGUST 2026Technical Data Sheet

AWSA5.8-92 BCUP-5Brazing Alloy,silver

American Welding Society, Inc. · NSN 3439-00-224-3580 · FSC 3439 · No Item Name Available
Verified by PartsTable
NSN 3439-00-224-3580 — this item is cataloged by the U.S. Government under National Stock Number 3439-00-224-3580. Primary manufacturer part number: AWSA5.8-92 BCUP-5.
Features
  • Brazing Alloy,silver — FSC 3439
  • Diameter: 0.063 INCHES NOMINAL IN
  • Precious Material: SILVER
  • Nondefinitive Spec/std Data: BCUP-5 CLASS
  • Precious Material and Weight: 1.860 SILVER OUNCES, TROY
  • Chemical Composition Percentage: COPPER 79.15,SILVER 15.5,PHOSPHORUS 5.2,REMAINDER NOT SPECIFIED
  • Physical Form: WIRE
  • Precious Material and Location: INTEGRAL SILVER
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Brazing Alloy,silver, cataloged under National Stock Number 3439-00-224-3580, 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3439-00-224-3580
Primary Part NumberAWSA5.8-92 BCUP-5
Item NameBrazing Alloy,silver
FSC / FSG3439 / 34 — No Item Name Available
ManufacturerAmerican Welding Society, Inc.
StatusACTIVE
Diameter0.063 INCHES NOMINAL IN
Precious MaterialSILVER
Nondefinitive Spec/std DataBCUP-5 CLASS
Precious Material and Weight1.860 SILVER OUNCES, TROY
Chemical Composition PercentageCOPPER 79.15,SILVER 15.5,PHOSPHORUS 5.2,REMAINDER NOT SPECIFIED
Physical FormWIRE
Precious Material and LocationINTEGRAL SILVER
Content Within Each Unit Package1 TROY LB
Flux FeatureNOT INCLUDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3439-00-052-1899AWSA5.8-92 BCUP-5-0.063 INTERCHANGEABLE
Brazing Alloy,silver
American Welding Society, Inc.
3439-00-077-1417AWSA5.8-92 BCUP-5 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
3439-00-262-4174 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
AWSA5.8-92 BCUP-5 PRIMARY American Welding Society, Inc. (USA)
QQS561CLASS3 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
QQB650 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
AWS A5.8 American Welding Society, Inc. (USA)
Related Parts
3439-00-052-1899INTERCHANGEABLE
BRAZING ALLOY,SILVER
AWSA5.8-92 BCUP-5-0.063
3439-00-077-1417INTERCHANGEABLE
BRAZING ALLOY,SILVER
AWSA5.8-92 BCUP-5
3439-00-188-6982INTERCHANGEABLE
BRAZING ALLOY,COPPER
3132
3439-00-188-6983INTERCHANGEABLE
BRAZING ALLOY,COPPER
3439-00-204-2555INTERCHANGEABLE
BRAZING ALLOY,COPPER
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
3439-01-268-0532INTERCHANGEABLE
BRAZING ALLOY,SILVER
AWSA5.8-92 BCUP-3

Frequently Asked Questions

What is NSN 3439-00-224-3580?

NSN 3439-00-224-3580 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 3439-00-224-3580?

NSN 3439-00-224-3580 has 4 cross-referenced part numbers: AWSA5.8-92 BCUP-5 (American Welding Society, Inc.), QQS561CLASS3 (Federal Specifications Promulgated by General Services Administration Washington DC), QQB650 (Federal Specifications Promulgated by General Services Administration Washington DC), AWS A5.8 (American Welding Society, Inc.).

What NSN replaces 3439-00-224-3580?

There are 12 known substitutes for 3439-00-224-3580: 3439-00-052-1899, 3439-00-077-1417, 3439-00-188-6982 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AWSA5.8-92 BCUP-5?

Key specifications for AWSA5.8-92 BCUP-5: Diameter: 0.063 INCHES NOMINAL IN; Precious Material: SILVER; Nondefinitive Spec/std Data: BCUP-5 CLASS; Precious Material and Weight: 1.860 SILVER OUNCES, TROY. 9 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com