PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21181CWasher,recessed

Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. · NSN 5310-01-143-4201 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-143-4201 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-143-4201. Primary manufacturer part number: 21181C.
Features
  • Washer,recessed — FSC 5310
  • Style Designator: RECESSED
  • Material: COPPER ALLOY OVERALL
  • Color: YELLOW OVERALL
  • Recess Depth: 0.094 INCHES NOMINAL IN
  • Recess Diameter: 0.406 INCHES NOMINAL IN
  • Outside Diameter: 0.750 INCHES NOMINAL IN
  • Hole Diameter: 0.281 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy Overall construction
General Description

The Washer,recessed, cataloged under National Stock Number 5310-01-143-4201, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-143-4201
Primary Part Number21181C
Item NameWasher,recessed
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerCrane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
StatusACTIVE
Style DesignatorRECESSED
MaterialCOPPER ALLOY OVERALL
ColorYELLOW OVERALL
Recess Depth0.094 INCHES NOMINAL IN
Recess Diameter0.406 INCHES NOMINAL IN
Outside Diameter0.750 INCHES NOMINAL IN
Hole Diameter0.281 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4810-00-167-604521181 INTERCHANGEABLE
Body-Seat Assy
Eaton Aerospace Llc
5310-00-638-602621181 INTERCHANGEABLE
Nut,plain,hexagon
Dresser, Llc
5905-00-660-6930D203 INTERCHANGEABLE
Resistor,thermal
Therm-O-Disc Inc Sub of Emerson Electric Co
6550-01-316-0235221181 INTERCHANGEABLE
Culture Medium,salmonella Shigel
Becton, Dickinson and Company Dba Becton Dickinson & Co
5950-01-386-348021181 INTERCHANGEABLE
Transformer,power
Antenna Research Associates, Incorporated
5340-01-696-324321181 INTERCHANGEABLE
Runner
American Industrial Plastics Llc
Cross-Reference Index
Part NumberManufacturer
21181 Zf Industrieantriebe Witten Gmbh (DEU)
21181 Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. (USA)
21181C PRIMARY Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. (USA)
21181-C Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
4810-00-167-6045INTERCHANGEABLE
BODY-SEAT ASSY
21181
5310-00-638-6026INTERCHANGEABLE
NUT,PLAIN,HEXAGON
21181
5905-00-660-6930INTERCHANGEABLE
RESISTOR,THERMAL
D203
6550-01-316-0235INTERCHANGEABLE
CULTURE MEDIUM,SALMONELLA SHIGEL
221181
5950-01-386-3480INTERCHANGEABLE
TRANSFORMER,POWER
21181
5340-01-696-3243INTERCHANGEABLE
RUNNER
21181

Frequently Asked Questions

What is NSN 5310-01-143-4201?

NSN 5310-01-143-4201 is a Washer,recessed, manufactured by Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp., classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-143-4201?

NSN 5310-01-143-4201 has 4 cross-referenced part numbers: 21181 (Zf Industrieantriebe Witten Gmbh), 21181 (Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.), 21181C (Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.), 21181-C (Zf Industrieantriebe Witten Gmbh).

What NSN replaces 5310-01-143-4201?

There are 6 known substitutes for 5310-01-143-4201: 4810-00-167-6045, 5310-00-638-6026, 5905-00-660-6930 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21181C?

Key specifications for 21181C: Style Designator: RECESSED; Material: COPPER ALLOY OVERALL; Color: YELLOW OVERALL; Recess Depth: 0.094 INCHES NOMINAL IN. 8 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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