PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C21APin,piston

Gardner Denver Inc. · NSN 4310-01-040-7863 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-01-040-7863 — this item is cataloged by the U.S. Government under National Stock Number 4310-01-040-7863. Primary manufacturer part number: C21A.
Features
  • Pin,piston — FSC 4310
  • Countersink Angle in Deg: 45.0
  • Bore Diameter: 0.3120 INCHES NOMINAL IN
  • Bore Style: INSIDE CHAMFER STRAIGHT-THRU BORE
  • Material: STEEL
  • Outside Diameter: 0.56250 INCHES NOMINAL IN
  • Casehardening Indicator: CASEHARDENED
  • End Chamfer Angle in Deg: 45.0
Applications
  • Applications requiring Steel construction
General Description

The Pin,piston, cataloged under National Stock Number 4310-01-040-7863, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Gardner Denver Inc.. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4310-01-040-7863
Primary Part NumberC21A
Item NamePin,piston
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerGardner Denver Inc.
StatusACTIVE
Countersink Angle in Deg45.0
Bore Diameter0.3120 INCHES NOMINAL IN
Bore StyleINSIDE CHAMFER STRAIGHT-THRU BORE
MaterialSTEEL
Outside Diameter0.56250 INCHES NOMINAL IN
Casehardening IndicatorCASEHARDENED
End Chamfer Angle in Deg45.0
Body Length1.4350 INCHES NOMINAL IN
Body StyleCHAMFERED ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5945-00-106-6677C-21W INTERCHANGEABLE
Relay,electromagnetic
Te Connectivity Corporation
2940-00-376-857651028 INTERCHANGEABLE
Filter Element,fluid
Wix Corp
6115-00-548-1382 INTERCHANGEABLE
Generator Set,gasoline Engine
Cross-Reference Index
Part NumberManufacturer
C21A PRIMARY Gardner Denver Inc. (USA)
Related Parts
5945-00-106-6677INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
C-21W
2940-00-376-8576INTERCHANGEABLE
FILTER ELEMENT,FLUID
51028
6115-00-548-1382INTERCHANGEABLE
GENERATOR SET,GASOLINE ENGINE

Frequently Asked Questions

What is NSN 4310-01-040-7863?

NSN 4310-01-040-7863 is a Pin,piston, manufactured by Gardner Denver Inc., classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-01-040-7863?

NSN 4310-01-040-7863 has 1 cross-referenced part number: C21A (Gardner Denver Inc.).

What NSN replaces 4310-01-040-7863?

There are 3 known substitutes for 4310-01-040-7863: 5945-00-106-6677, 2940-00-376-8576, 6115-00-548-1382. Verify interchangeability with system specifications before substitution.

What are the specifications of C21A?

Key specifications for C21A: Countersink Angle in Deg: 45.0; Bore Diameter: 0.3120 INCHES NOMINAL IN; Bore Style: INSIDE CHAMFER STRAIGHT-THRU BORE; Material: STEEL. 9 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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