PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18900Washer,flat

Altra Industrial Motion Corp. · NSN 5310-01-477-0848 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-477-0848 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-477-0848. Primary manufacturer part number: 18900.
Features
  • Washer,flat — FSC 5310
  • Material: STEEL OVERALL
  • Cross-Sectional Shape Style: RECTANGULAR
  • Thickness: 0.141 INCHES NOMINAL IN
  • Hole Diameter: 1.250 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
  • Overall Diameter: 2.438 INCHES NOMINAL IN
  • Center Hole Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-477-0848, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Altra Industrial Motion Corp.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-477-0848
Primary Part Number18900
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerAltra Industrial Motion Corp.
StatusACTIVE
MaterialSTEEL OVERALL
Cross-Sectional Shape StyleRECTANGULAR
Thickness0.141 INCHES NOMINAL IN
Hole Diameter1.250 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Overall Diameter2.438 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5340-00-193-3638150BPTL6 INTERCHANGEABLE
Strap,retaining
Diamond Manufacturing Company
5998-00-498-262018900 INTERCHANGEABLE
Circuit Card Assembly
Custom Metering Company Inc
3930-00-543-8536 INTERCHANGEABLE
Resistor Unit
6630-01-116-768618900 INTERCHANGEABLE
Test Set,water Turbidity and Col
Hach Company Dba Hach Co
6240-01-344-666642MB/CAP/120V INTERCHANGEABLE
Lamp,incandescent
Gte Products Corp Sylvania Miniature Lighting Div
Cross-Reference Index
Part NumberManufacturer
18900 PRIMARY Altra Industrial Motion Corp. (USA)
Related Parts
5340-00-193-3638INTERCHANGEABLE
STRAP,RETAINING
150BPTL6
5998-00-498-2620INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
18900
3930-00-543-8536INTERCHANGEABLE
RESISTOR UNIT
6630-01-116-7686INTERCHANGEABLE
TEST SET,WATER TURBIDITY AND COL
18900
6240-01-344-6666INTERCHANGEABLE
LAMP,INCANDESCENT
42MB/CAP/120V

Frequently Asked Questions

What is NSN 5310-01-477-0848?

NSN 5310-01-477-0848 is a Washer,flat, manufactured by Altra Industrial Motion Corp., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-477-0848?

NSN 5310-01-477-0848 has 1 cross-referenced part number: 18900 (Altra Industrial Motion Corp.).

What NSN replaces 5310-01-477-0848?

There are 5 known substitutes for 5310-01-477-0848: 5340-00-193-3638, 5998-00-498-2620, 3930-00-543-8536 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18900?

Key specifications for 18900: Material: STEEL OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Thickness: 0.141 INCHES NOMINAL IN; Hole Diameter: 1.250 INCHES NOMINAL IN. 7 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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