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Technical Data Sheet
PartsTable / COMPONENT / 20659-1
20659-1 ✓ 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 BEARING,SLEEVE is a the manufacturer industrial component. Key specifications include special_features: STYLE DESIGNATOR:NO.60 IRREGULAR SHAPE FROM FIIG A03200, supplementary_features: CROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-143-1331, 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
20659-1
NSN: 5305-00-143-1331
FSC: 5305
CAGE: 14802 — MANDZAK INSTRUMENTATION SPECIALISTS INC (USA)
SPECIFICATIONS
special_featuresSTYLE DESIGNATOR:NO.60 IRREGULAR SHAPE FROM FIIG A03200
supplementary_featuresCROSS-SECTIONAL SHAPE STYLE:NO.195 IRREGULAR SHAPE FROM FIIG A03200
NSN5305-00-143-1331
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 20659-1 · 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
•
HEAD STYLE: THUMB NO. 3
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY: 1
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER: 0.420 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.590 INCHES NOMINAL IN
•
POINT STYLE: FLAT
•
WIDTH BETWEEN FLATS: 0.320 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLETHUMB NO. 3
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY1
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.420 INCHES NOMINAL IN
FASTENER LENGTH0.590 INCHES NOMINAL IN
POINT STYLEFLAT
WIDTH BETWEEN FLATS0.320 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
HEAD HEIGHT0.360 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
206-591Interchangeable
interchangeable cross-reference
interchangeable
R11666Interchangeable
interchangeable cross-reference
interchangeable
51996Interchangeable
interchangeable cross-reference
interchangeable
9987-824PC143Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20659-1?
20659-1 is a BEARING,SLEEVE.
What parts can replace 20659-1?
There are 4 known substitutes for 20659-1: 206-591, R11666, 51996 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20659-1?
20659-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-143-1331. 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