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9521B — LOCK,VALVE SPRING RETAINER

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

9521B: LOCK,VALVE SPRING RETAINER.

The LOCK,VALVE SPRING RETAINER is a the manufacturer industrial component. Key specifications include material: IRON CAST, overall_height: 0.875 INCHES NOMINAL IN, thread_provision: UNTHREADED, largest_outside_diameter: 1.300 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4310-01-323-3137, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
9521B
NSN: 4310-01-323-3137
FSC: 4310 — Compressors and Vacuum Pumps
CAGE: 8FGX3 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORP DBA STEAM & AIR SOLUTIONS DIV CURTISS-WRIGHT STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
materialIRON CAST
overall_height0.875 INCHES NOMINAL IN
thread_provisionUNTHREADED
largest_outside_diameter1.300 INCHES NOMINAL IN
NSN4310-01-323-3137
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available LOCK,VALVE SPRING RETAINER TITLE COMPONENT PN 9521B MFR LOCK,VALVE SPRING RETA
KEY FEATURES
•
THREAD PROVISION: UNTHREADED
•
LARGEST OUTSIDE DIAMETER: 1.300 INCHES NOMINAL IN
•
MATERIAL: IRON CAST
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.875 INCHES NOMINAL IN
THREAD PROVISIONUNTHREADED
LARGEST OUTSIDE DIAMETER1.300 INCHES NOMINAL IN
MATERIALIRON CAST
OTHER ITEMS IN FSC 4310 — Compressors and Vacuum Pumps
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4310-00-000-0050 4310-00-001-0059 4310-00-001-2044 4310-00-001-3477 4310-00-001-3493 4310-00-001-6194 4310-00-001-6381 4310-00-001-7755
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 9521B?
9521B is a LOCK,VALVE SPRING RETAINER.
What is the NSN for 9521B?
9521B is cataloged in the U.S. Government catalog under NSN 4310-01-323-3137. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.