PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B57L0020-5Mounting Pad,electrical-Electron

Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co · NSN 5999-01-063-4668 · FSC 5999 · No Item Name Available
Verified by PartsTable
NSN 5999-01-063-4668 — this item is cataloged by the U.S. Government under National Stock Number 5999-01-063-4668. Primary manufacturer part number: B57L0020-5.
Features
  • Mounting Pad,electrical-Electron — FSC 5999
  • 2 verified cross-references
  • Primary manufacturer: Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Mounting Pad,electrical-Electron, cataloged under National Stock Number 5999-01-063-4668, is classified within Federal Supply Class 5999 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN5999-01-063-4668
Primary Part NumberB57L0020-5
Item NameMounting Pad,electrical-Electron
FSC / FSG5999 / 59 — No Item Name Available
ManufacturerMcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Criticality CodeQ
Unit of IssueEA
SMR CodeJN
Weight0.0100 lbs
Cube0.0010 cu ft
Verified Substitutes 3
5920-00-043-26410312.250MXP INTERCHANGEABLE
Fuse,cartridge
Littelfuse, Inc.
5985-00-201-506323669 INTERCHANGEABLE
Coupler,directional
Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
5920-00-798-57102110-0004 INTERCHANGEABLE
Fuse,cartridge
Keysight Technologies Inc
Cross-Reference Index
Part NumberManufacturer
B57L0020-5 Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co (USA)
312-250 Bivar Inc (USA)
Related Parts
5920-00-043-2641INTERCHANGEABLE
FUSE,CARTRIDGE
0312.250MXP
5985-00-201-5063INTERCHANGEABLE
COUPLER,DIRECTIONAL
23669
5920-00-798-5710INTERCHANGEABLE
FUSE,CARTRIDGE
2110-0004

Frequently Asked Questions

What is NSN 5999-01-063-4668?

NSN 5999-01-063-4668 is a Mounting Pad,electrical-Electron, manufactured by Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co, classified under FSC 5999 (No Item Name Available). Status: active.

What are the part numbers for NSN 5999-01-063-4668?

NSN 5999-01-063-4668 has 2 cross-referenced part numbers: B57L0020-5 (Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co), 312-250 (Bivar Inc).

What NSN replaces 5999-01-063-4668?

There are 3 known substitutes for 5999-01-063-4668: 5920-00-043-2641, 5985-00-201-5063, 5920-00-798-5710. Verify interchangeability with system specifications before substitution.

What are the specifications of B57L0020-5?

Key specifications for B57L0020-5: Special Features: POLYAMIDE PER MIL-M-20693 TYPE 1,COLOR WHITE OR NATURAL POLYAMIDE; 0.350 IN. LG; 0.100 IN. W; 0.100 IN. H IN; Special Features: POLYAMIDE PER MIL-M-20693 TYPE 1,COLOR WHITE OR NATURAL POLYAMIDE; 0.350 IN. LG; 0.100 IN. W; 0.100 IN. H IN. 2 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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