PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

121-539Washer,flat

Cmc Electronics Inc · NSN 5310-00-639-6711 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-639-6711 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-639-6711. Primary manufacturer part number: 121-539.
Features
  • Washer,flat — FSC 5310
  • Center Hole Shape Style: ROUND
  • Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
  • Material: COPPER ALLOY OVERALL
  • Peripheral Shape Style: ROUND
  • Thickness: 0.022 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
  • Hole Diameter: 0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN
  • Overall Diameter: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-639-6711, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Cmc Electronics Inc. Government technical data includes 9 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-639-6711
Primary Part Number121-539
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCmc Electronics Inc
StatusCANCELLED
Center Hole Shape StyleROUND
Surface Treatment Document and ClassificationAMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
MaterialCOPPER ALLOY OVERALL
Peripheral Shape StyleROUND
Thickness0.022 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN
Hole Diameter0.094 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN
Overall Diameter0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
Cross-Sectional Shape StyleRECTANGULAR
Surface TreatmentCADMIUM OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3110-00-100-6180067111 INTERCHANGEABLE
Ball,bearing
Cnh Industrial America Llc Dba Cnh America
5210-00-229-304536-24 INTERCHANGEABLE
Caliper,outside
L.s. Starrett Company (the) Div Tool Division
6810-00-264-6592 INTERCHANGEABLE
Sodium Chloride
5310-00-285-80993624 INTERCHANGEABLE
Washer,flat
Telemechanics Inc
2040-00-391-4440 INTERCHANGEABLE
Fairwater
5315-00-392-212536-24 INTERCHANGEABLE
Pin,dowel
Telemechanics Inc
5210-00-448-3624117781 INTERCHANGEABLE
Gage Set,gap Setting and Thickne
Alnitak Corporation
6810-01-014-56163624 INTERCHANGEABLE
Sodium Chloride
Avantor Performance Materials, Inc.
4940-01-073-15743624 INTERCHANGEABLE
Press,hydraulic,portable
Spex Certiprep Inc
5910-01-255-0579 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Cross-Reference Index
Part NumberManufacturer
121-539 PRIMARY Cmc Electronics Inc (CAN)
10-9943 Teledyne Industries Inc Teledyne Power Systems Div (USA)
3624 Zf Industrieantriebe Witten Gmbh (DEU)
10-9943 Amphenol Corp Div Amphenol Aerospace Operations (USA)
10-9943 Unison Industries Llc (USA)
Related Parts
3110-00-100-6180INTERCHANGEABLE
BALL,BEARING
067111
5210-00-229-3045INTERCHANGEABLE
CALIPER,OUTSIDE
36-24
6810-00-264-6592INTERCHANGEABLE
SODIUM CHLORIDE
5310-00-285-8099INTERCHANGEABLE
WASHER,FLAT
3624
2040-00-391-4440INTERCHANGEABLE
FAIRWATER
5315-00-392-2125INTERCHANGEABLE
PIN,DOWEL
36-24
5210-00-448-3624INTERCHANGEABLE
GAGE SET,GAP SETTING AND THICKNE
117781
6810-01-014-5616INTERCHANGEABLE
SODIUM CHLORIDE
3624
4940-01-073-1574INTERCHANGEABLE
PRESS,HYDRAULIC,PORTABLE
3624
5910-01-255-0579INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
5120-01-335-9041INTERCHANGEABLE
SOCKET,SOCKET WRENCH
6625-01-366-2296INTERCHANGEABLE
PANEL,TEST,ELECTRICAL
3624-1-1

Frequently Asked Questions

What is NSN 5310-00-639-6711?

NSN 5310-00-639-6711 is a Washer,flat, manufactured by Cmc Electronics Inc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-639-6711?

NSN 5310-00-639-6711 has 5 cross-referenced part numbers: 121-539 (Cmc Electronics Inc), 10-9943 (Teledyne Industries Inc Teledyne Power Systems Div), 3624 (Zf Industrieantriebe Witten Gmbh), 10-9943 (Amphenol Corp Div Amphenol Aerospace Operations), 10-9943 (Unison Industries Llc).

What NSN replaces 5310-00-639-6711?

There are 12 known substitutes for 5310-00-639-6711: 3110-00-100-6180, 5210-00-229-3045, 6810-00-264-6592 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 121-539?

Key specifications for 121-539: Center Hole Shape Style: ROUND; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Material: COPPER ALLOY OVERALL; Peripheral Shape Style: ROUND. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-639-6711 still in active supply?

NSN 5310-00-639-6711 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.
PartsTable Design LLC · partstable.com