PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

28-503Brush,electrical Contact

Abb Motors & Mechanical Inc Div Abb Motors and Mechanical Inc. · NSN 5977-00-102-4008 · FSC 5977 · No Item Name Available
Verified by PartsTable
NSN 5977-00-102-4008 — this item is cataloged by the U.S. Government under National Stock Number 5977-00-102-4008. Primary manufacturer part number: 28-503.
Features
  • Brush,electrical Contact — FSC 5977
  • Width: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
  • Brush Shunt Length: 3.500 INCHES MINIMUM AND 3.625 INCHES MAXIMUM SINGLE SHUNT IN
  • Top Style: BEVELED FRONT
  • Contact Face Style: FLAT
  • Terminal Type and Quantity: 1 STRAIGHT W/SLOT
  • Style Designator: ONE PIECE
  • Length: 1.219 INCHES MINIMUM AND 1.281 INCHES MAXIMUM IN
Applications
  • Applications requiring Carbon construction
General Description

The Brush,electrical Contact, cataloged under National Stock Number 5977-00-102-4008, is classified within Federal Supply Class 5977 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Abb Motors & Mechanical Inc Div Abb Motors and Mechanical Inc.. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5977-00-102-4008
Primary Part Number28-503
Item NameBrush,electrical Contact
FSC / FSG5977 / 59 — No Item Name Available
ManufacturerAbb Motors & Mechanical Inc Div Abb Motors and Mechanical Inc.
StatusACTIVE
Width0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN
Brush Shunt Length3.500 INCHES MINIMUM AND 3.625 INCHES MAXIMUM SINGLE SHUNT IN
Top StyleBEVELED FRONT
Contact Face StyleFLAT
Terminal Type and Quantity1 STRAIGHT W/SLOT
Style DesignatorONE PIECE
Length1.219 INCHES MINIMUM AND 1.281 INCHES MAXIMUM IN
Shunt Position Designator2
Thickness0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
Body StyleRECTANGULAR COMMUTATOR
MaterialCARBON
Angle30.0 DEGREES NOMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3110-00-100-6149 INTERCHANGEABLE
Ball,bearing
2805-00-382-7985028503 INTERCHANGEABLE
Cap
Caterpillar Inc Div Caterpillar Defense
3030-00-726-2575 INTERCHANGEABLE
Belt,v
3455-00-971-8382100869 INTERCHANGEABLE
File,rotary
Jarvis Cutting Tools Inc
3442-01-004-4370 INTERCHANGEABLE
Press,arbor,power-Operated
3610-01-151-747328503 INTERCHANGEABLE
Idler,sheave Bar
Baumfolder Corp
5895-01-364-686828504 INTERCHANGEABLE
Digital Imaging Set
Motorola/codex Corp Sub of Motorola Inc
Cross-Reference Index
Part NumberManufacturer
28-503 Baldor Electric Co (USA)
28-503 PRIMARY Abb Motors & Mechanical Inc Div Abb Motors and Mechanical Inc. (USA)
Related Parts
3110-00-100-6149INTERCHANGEABLE
BALL,BEARING
2805-00-382-7985INTERCHANGEABLE
CAP
028503
3030-00-726-2575INTERCHANGEABLE
BELT,V
3455-00-971-8382INTERCHANGEABLE
FILE,ROTARY
100869
3442-01-004-4370INTERCHANGEABLE
PRESS,ARBOR,POWER-OPERATED
3610-01-151-7473INTERCHANGEABLE
IDLER,SHEAVE BAR
28503
5895-01-364-6868INTERCHANGEABLE
DIGITAL IMAGING SET
28504

Frequently Asked Questions

What is NSN 5977-00-102-4008?

NSN 5977-00-102-4008 is a Brush,electrical Contact, manufactured by Abb Motors & Mechanical Inc Div Abb Motors and Mechanical Inc., classified under FSC 5977 (No Item Name Available). Status: active.

What are the part numbers for NSN 5977-00-102-4008?

NSN 5977-00-102-4008 has 2 cross-referenced part numbers: 28-503 (Baldor Electric Co), 28-503 (Abb Motors & Mechanical Inc Div Abb Motors and Mechanical Inc.).

What NSN replaces 5977-00-102-4008?

There are 7 known substitutes for 5977-00-102-4008: 3110-00-100-6149, 2805-00-382-7985, 3030-00-726-2575 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 28-503?

Key specifications for 28-503: Width: 0.865 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Brush Shunt Length: 3.500 INCHES MINIMUM AND 3.625 INCHES MAXIMUM SINGLE SHUNT IN; Top Style: BEVELED FRONT; Contact Face Style: FLAT. 12 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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