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121545 — AIR SPRING,VEHICULAR

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

121545: AIR SPRING,VEHICULAR.

The AIR SPRING,VEHICULAR is a the manufacturer industrial component. Key specifications include shape: CIRCULAR, overall_diameter: 11.5 INCHES NOMINAL IN, special_features: INTERNAL BUMP STOP; RUBBER MATERIAL. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-584-0618, 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
121545
NSN: 5325-00-584-0618
NIINs: 005840618, 016458459
FSC: 5325 — Fastening Devices
CAGE: 95368 — AERCO INTERNATIONAL, INC. DBA AERCO INTERNATIONAL INC (USA)
SPECIFICATIONS
shapeCIRCULAR
overall_diameter11.5 INCHES NOMINAL IN
special_featuresINTERNAL BUMP STOP; RUBBER MATERIAL
NSN5325-00-584-0618
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 121545 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL HARDNESS RATING: 44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
•
USAGE DESIGN: EXTERNAL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MAJOR THICKNESS: 0.042 INCHES NOMINAL IN
•
INSIDE DIAMETER: 0.354 INCHES NOMINAL IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: EXTERNAL
•
SURFACE TREATMENT: PASSIVATE
TECHNICAL CHARACTERISTICS
MATERIAL HARDNESS RATING44.0 ROCKWELL C MINIMUM AND 51.0 ROCKWELL C MAXIMUM
USAGE DESIGNEXTERNAL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MAJOR THICKNESS0.042 INCHES NOMINAL IN
INSIDE DIAMETER0.354 INCHES NOMINAL IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLEEXTERNAL
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL CORROSION RESISTING
SUBSTITUTES & CROSS-REFERENCES 5
5555-37HReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
7100-37-SS2Reference document
Same NSN cross-reference
Reference document — Secondary reference
MS90707-4037Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
067-0091-41Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
8504725-4Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 121545?
121545 is a AIR SPRING,VEHICULAR.
What parts can replace 121545?
There are 5 known substitutes for 121545: 5555-37H, 7100-37-SS2, MS90707-4037 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 121545?
121545 is cataloged in the U.S. Government catalog under NSN 5325-00-584-0618. 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.