PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5B5961Washer,flat

Caterpillar Inc Div Caterpillar Defense · NSN 5310-00-171-3528 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-171-3528 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-171-3528. Primary manufacturer part number: 5B5961.
Features
  • Washer,flat — FSC 5310
  • Center Hole Shape Style: ROUND
  • Material: COPPER OVERALL
  • Overall Diameter: 1.000 INCHES NOMINAL IN
  • Hole Diameter: 0.700 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Peripheral Shape Style: ROUND
  • Thickness: 0.062 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-171-3528, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 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: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-171-3528
Primary Part Number5B5961
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusCANCELLED
Center Hole Shape StyleROUND
MaterialCOPPER OVERALL
Overall Diameter1.000 INCHES NOMINAL IN
Hole Diameter0.700 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
Peripheral Shape StyleROUND
Thickness0.062 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
5950-00-519-899019888 INTERCHANGEABLE
Transformer,power Autotransforme
Magnetika Inc Div Magnetika/phillipsburg Location
3810-00-830-77581017021 INTERCHANGEABLE
Seal Body Panel
Fwd Seagrave Holdings Lp
5910-00-840-2403 INTERCHANGEABLE
Retainer,capacitor
4920-01-109-854034521 INTERCHANGEABLE
Thumbwheel
Safe Flight Instrument, Llc
5305-01-149-193419888 INTERCHANGEABLE
Screw,cap,hexagon Head
Fastenal Company Dba Fastenal Co
5995-01-468-805234521 INTERCHANGEABLE
Cable Assembly,radio Frequency
Phoenix Logistics, Llc
5133-01-672-644334521 INTERCHANGEABLE
Drill,twist
Viking Drill & Tool, Inc.
Cross-Reference Index
Part NumberManufacturer
34521 Arvinmeritor Inc (USA)
5B5961 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
19888 Arvinmeritor Inc (USA)
Related Parts
5950-00-519-8990INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
19888
3810-00-830-7758INTERCHANGEABLE
SEAL BODY PANEL
1017021
5910-00-840-2403INTERCHANGEABLE
RETAINER,CAPACITOR
4920-01-109-8540INTERCHANGEABLE
THUMBWHEEL
34521
5305-01-149-1934INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
19888
5995-01-468-8052INTERCHANGEABLE
CABLE ASSEMBLY,RADIO FREQUENCY
34521
5133-01-672-6443INTERCHANGEABLE
DRILL,TWIST
34521

Frequently Asked Questions

What is NSN 5310-00-171-3528?

NSN 5310-00-171-3528 is a Washer,flat, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-171-3528?

NSN 5310-00-171-3528 has 3 cross-referenced part numbers: 34521 (Arvinmeritor Inc), 5B5961 (Caterpillar Inc Div Caterpillar Defense), 19888 (Arvinmeritor Inc).

What NSN replaces 5310-00-171-3528?

There are 7 known substitutes for 5310-00-171-3528: 5950-00-519-8990, 3810-00-830-7758, 5910-00-840-2403 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5B5961?

Key specifications for 5B5961: Center Hole Shape Style: ROUND; Material: COPPER OVERALL; Overall Diameter: 1.000 INCHES NOMINAL IN; Hole Diameter: 0.700 INCHES NOMINAL IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-171-3528 still in active supply?

NSN 5310-00-171-3528 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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