PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S631Washer,flat

Cummins Inc. · NSN 5310-00-562-6560 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-562-6560 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-562-6560. Primary manufacturer part number: S631.
Features
  • Washer,flat — FSC 5310
  • Thickness: 0.070 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Center Hole Shape Style: ROUND
  • Hole Diameter: 0.280 INCHES NOMINAL IN
  • Overall Diameter: 0.625 INCHES NOMINAL IN
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 5310-00-562-6560, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Cummins Inc.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-562-6560
Primary Part NumberS631
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCummins Inc.
StatusACTIVE
Thickness0.070 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Center Hole Shape StyleROUND
Hole Diameter0.280 INCHES NOMINAL IN
Overall Diameter0.625 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5940-00-688-8812 INTERCHANGEABLE
Terminal,lug
6110-00-967-4257 INTERCHANGEABLE
Coil
Cross-Reference Index
Part NumberManufacturer
S631 Cummins South Pacific Pty Ltd Head Office (AUS)
S-631 Zf Industrieantriebe Witten Gmbh (DEU)
10392446 Nimikkeistokeskus Ncb Finland (FIN)
S631 International Trucks Australia Limited (AUS)
S631 PRIMARY Cummins Inc. (USA)
Related Parts
5940-00-688-8812INTERCHANGEABLE
TERMINAL,LUG
6110-00-967-4257INTERCHANGEABLE
COIL

Frequently Asked Questions

What is NSN 5310-00-562-6560?

NSN 5310-00-562-6560 is a Washer,flat, manufactured by Cummins Inc., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-562-6560?

NSN 5310-00-562-6560 has 5 cross-referenced part numbers: S631 (Cummins South Pacific Pty Ltd Head Office), S-631 (Zf Industrieantriebe Witten Gmbh), 10392446 (Nimikkeistokeskus Ncb Finland), S631 (International Trucks Australia Limited), S631 (Cummins Inc.).

What NSN replaces 5310-00-562-6560?

There are 2 known substitutes for 5310-00-562-6560: 5940-00-688-8812, 6110-00-967-4257. Verify interchangeability with system specifications before substitution.

What are the specifications of S631?

Key specifications for S631: Thickness: 0.070 INCHES NOMINAL IN; Material: STEEL OVERALL; Peripheral Shape Style: ROUND; Cross-Sectional Shape Style: RECTANGULAR. 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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