PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

41218KWasher,special

Griswold Industries Dba Cla-Val Co · NSN 5310-01-139-9620 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-139-9620 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-139-9620. Primary manufacturer part number: 41218K.
Features
  • Washer,special — FSC 5310
  • General Characteristics Item Description: COPPER ALLOY,MIL-B-16541,2.970 IN. OUTSIDE DIA,1.440 IN. RECESSED DIA,0.500 IN. MIN 0.503 IN. MAX HOLE DIA IN
  • 2 verified cross-references
  • Primary manufacturer: Griswold Industries Dba Cla-Val Co
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,special, cataloged under National Stock Number 5310-01-139-9620, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Griswold Industries Dba Cla-Val Co. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-139-9620
Primary Part Number41218K
Item NameWasher,special
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerGriswold Industries Dba Cla-Val Co
StatusACTIVE
General Characteristics Item DescriptionCOPPER ALLOY,MIL-B-16541,2.970 IN. OUTSIDE DIA,1.440 IN. RECESSED DIA,0.500 IN. MIN 0.503 IN. MAX HOLE DIA IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6250-00-079-98884-12-18 INTERCHANGEABLE
Lampholder
Lighting Components and Design Incorporated Dba Lc&d
5945-00-111-4915412-18 INTERCHANGEABLE
Relay,electromagnetic
Teledyne Defense Electronics, Llc Dba Teledyne Relays Div Https://www.teledyne.com/what-We-Do/
3110-00-155-6461218WG INTERCHANGEABLE
Bearing,ball,annular
Timken Co Div the Timken Company
6510-00-202-40000200049 INTERCHANGEABLE
Gauze,absorbent
Szy Holdings, Llc Dba Szy Holdings Llc
5133-00-228-1398 INTERCHANGEABLE
Drill,twist
5905-00-279-859250097PC14 INTERCHANGEABLE
Resistor,adjustable
Ward Leonard Ct Llc
4820-00-922-139641218 INTERCHANGEABLE
Diaphragm Assembly,valve
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
6680-01-177-1478 INTERCHANGEABLE
Gage Rod-Cap,liquid Level
5962-01-311-28433221385-1 INTERCHANGEABLE
Microcircuit,digital
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6680-01-644-891841218 INTERCHANGEABLE
Gage Rod,liquid Level
Brunswick Corp Dba Mercury Marine Div Mercury Marine
Cross-Reference Index
Part NumberManufacturer
41218 Griswold Industries Dba Cla-Val Co (USA)
41218K PRIMARY Griswold Industries Dba Cla-Val Co (USA)
Related Parts
6250-00-079-9888INTERCHANGEABLE
LAMPHOLDER
4-12-18
5945-00-111-4915INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
412-18
3110-00-155-6461INTERCHANGEABLE
BEARING,BALL,ANNULAR
218WG
6510-00-202-4000INTERCHANGEABLE
GAUZE,ABSORBENT
0200049
5133-00-228-1398INTERCHANGEABLE
DRILL,TWIST
5905-00-279-8592INTERCHANGEABLE
RESISTOR,ADJUSTABLE
50097PC14
4820-00-922-1396INTERCHANGEABLE
DIAPHRAGM ASSEMBLY,VALVE
41218
6680-01-177-1478INTERCHANGEABLE
GAGE ROD-CAP,LIQUID LEVEL
5962-01-311-2843INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
3221385-1
6680-01-644-8918INTERCHANGEABLE
GAGE ROD,LIQUID LEVEL
41218
5120-01-651-4491INTERCHANGEABLE
SCREWDRIVER ATTACHMENT,SOCKET WR
41218
2510-01-729-4912INTERCHANGEABLE
DOOR,HATCH,VEHICLE
41218

Frequently Asked Questions

What is NSN 5310-01-139-9620?

NSN 5310-01-139-9620 is a Washer,special, manufactured by Griswold Industries Dba Cla-Val Co, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-139-9620?

NSN 5310-01-139-9620 has 2 cross-referenced part numbers: 41218 (Griswold Industries Dba Cla-Val Co), 41218K (Griswold Industries Dba Cla-Val Co).

What NSN replaces 5310-01-139-9620?

There are 12 known substitutes for 5310-01-139-9620: 6250-00-079-9888, 5945-00-111-4915, 3110-00-155-6461 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 41218K?

Key specifications for 41218K: General Characteristics Item Description: COPPER ALLOY,MIL-B-16541,2.970 IN. OUTSIDE DIA,1.440 IN. RECESSED DIA,0.500 IN. MIN 0.503 IN. MAX HOLE DIA IN. 1 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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