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Technical Data Sheet
PartsTable / COMPONENT / 65-4-40
65-4-40 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SPACER,SLEEVE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYHEXAMETHYLENE ADIPAMIDE OR PLASTIC ACETAL OVERALL, overall_length: 0.3800 INCHES NOMINAL IN, body_inside_diameter: 1.0200 INCHES NOMINAL IN, body_outside_diameter: 1.2500 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-151-3466, 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
65-4-40
NSN: 5306-00-151-3466
FSC: 5306
CAGE: 80049 — DEPARTMENT OF THE AIR FORCE (USA)
SPECIFICATIONS
materialPLASTIC POLYHEXAMETHYLENE ADIPAMIDE OR PLASTIC ACETAL OVERALL
overall_length0.3800 INCHES NOMINAL IN
body_inside_diameter1.0200 INCHES NOMINAL IN
body_outside_diameter1.2500 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
NSN5306-00-151-3466
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 65-4-40 · 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
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
FEATURES PROVIDED: FINISHED HEAD
•
FASTENER LENGTH: 4.000 INCHES NOMINAL IN
•
HEAD STYLE: HEXAGON
•
WIDTH BETWEEN FLATS: 0.375 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES IN
FEATURES PROVIDEDFINISHED HEAD
FASTENER LENGTH4.000 INCHES NOMINAL IN
HEAD STYLEHEXAGON
WIDTH BETWEEN FLATS0.375 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH20
THREAD LENGTH0.875 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
FF-B-575 TYPE II GRADE 1Upgraded Successor
successor cross-reference
successor
FFB571ANDCLASSCUpgraded Successor
successor cross-reference
successor
65-10-64Upgraded Successor
successor cross-reference
successor
65440Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 65-4-40?
65-4-40 is a SPACER,SLEEVE.
What parts can replace 65-4-40?
There are 4 known substitutes for 65-4-40: FF-B-575 TYPE II GRADE 1, FFB571ANDCLASSC, 65-10-64 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 65-4-40?
65-4-40 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-151-3466. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026