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STM3M440-3 — RETAINER,NUT AND BOLT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

STM3M440-3: RETAINER,NUT AND BOLT.

The RETAINER,NUT AND BOLT is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, overall_width: 0.251 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN, overall_height: 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN, overall_length: 0.912 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN, style_designator: ANCHOR, surface_treatment: PASSIVATE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-532-3658, 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
STM3M440-3
NSN: 5340-01-532-3658
FSC: 5340 — Hardware, Commercial
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
overall_width0.251 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
overall_height0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
overall_length0.912 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN
special_featuresMATERIAL DOCUMENT/CLASSIFICATION:AMS 5525 OR AMS 5735(RC 32MIN);RETAINER DESIGNED FOR USE W/ST3M572-3M NUT;NAS463 SHIM TO AVION DISIMILAR METAL CONTACT AND TO PROVIDE UP TO 0.064 GRIP RANGE
style_designatorANCHOR
surface_treatmentPASSIVATE
material_thickness0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
mounting_hole_diameter0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
end_item_identificationAIRCRAFT, EAGLE F-15
width_between_cup_flats0.384 INCHES MINIMUM AND 0.394 INCHES MAXIMUM IN
distance_between_mounting_hole_centers0.623 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
NSN5340-01-532-3658
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: STM3M440-3 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
DISTANCE BETWEEN MOUNTING HOLE CENTERS: 0.623 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: ANCHOR
•
MOUNTING HOLE DIAMETER: 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
•
CENTER TO CENTER DISTANCE BETWEEN CUP AND MOUNTING HOLE: 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
DISTANCE BETWEEN MOUNTING HOLE CENTERS0.623 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
STYLE DESIGNATORANCHOR
MOUNTING HOLE DIAMETER0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN
OVERALL LENGTH0.912 INCHES MINIMUM AND 0.922 INCHES MAXIMUM IN
OVERALL WIDTH0.251 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN
MATERIAL THICKNESS0.030 INCHES MINIMUM AND 0.040 INCHES MAXIMUM IN
CENTER TO CENTER DISTANCE BETWEEN CUP AND MOUNTING HOLE0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN
SPECIAL FEATURESMATERIAL DOCUMENT/CLASSIFICATION:AMS 5525 OR AMS 5735(RC 32MIN);RETAINER DESIGNED FOR USE W/ST3M572-3M NUT;NAS463 SHIM TO AVION DISIMILAR METAL CONTACT AND TO PROVIDE UP TO 0.064 GRIP RANGE
SURFACE TREATMENTPASSIVATE
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 2
K52388-3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
ST3M440-3Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is STM3M440-3?
STM3M440-3 is a RETAINER,NUT AND BOLT.
What parts can replace STM3M440-3?
There are 2 known substitutes for STM3M440-3: K52388-3, ST3M440-3. Substitute compatibility should be verified for your specific system.
What is the NSN for STM3M440-3?
STM3M440-3 is cataloged in the U.S. Government catalog under NSN 5340-01-532-3658. 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.