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18-8 Stainless Steel Ring-Grip Quick-Release Pin - 3-16 Diameter

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Part# 04-04257
MFR Model# 98404A004


The smooth ring handle on these pins won't catch on parts. A spring-loaded, nonlocking retaining ball pops out to hold pins in place. The hole should be as close to the diameter as possible, but not larger than the diameter at extended ball height. The ends are chamfered for easy insertion. Breaking strength is measured as single shear, which is the force required to break the pin into two pieces. Also known as faspins.

18-8 stainless steel pins offer a balance of strength and corrosion resistance. They may be mildly magnetic.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • Pin Type: Quick Release
  • End Type: Spring-Loaded Ball
  • Head Type: Ring
  • Shaft Type: Plain
  • End Shape: Chamfered
  • System of Measurement: Inch
  • Material: 18-8 Stainless Steel
  • Usable Length: 3/8"
  • Diameter: 3/16"
  • Diameter Tolerance: -0.003" to 0"
  • Diameter at Extended Ball Height: 0.204"
  • Min. Hardness: Rockwell B85
  • Breaking Strength: 2,300 lbs.
  • Number of Retaining Balls: 1
  • Ball Material: 316 Stainless Steel
  • Spring Material: 316 Stainless Steel
  • Handle Material: 316 Stainless Steel
  • Lock Type: Nonlocking
  • Passivation: Not Passivated
  • RoHS: RoHS 3 (2015/863/EU) Compliant
  • REACH: REACH (EC 1907/2006) (06/10/2022, 224 SVHC) Compliant
  • DFARS: Specialty Metals Compliant (252.225-7008)
  • Country of Origin: United States
  • USMCA Qualifying: No
  • Schedule B: 731829.0000
  • ECCN: EAR99



Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.