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Technical Data Sheet
PartsTable / COMPONENT / AN-200
AN-200 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include functional_description: USED WITH FD-205 WHICH IS PART OF FIBER OPTIC INTRUSION DETECTION SYSTEM (FOIDS 200), reference_data_and_literature: 31S9-2GSS42-1. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-185-6375, 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
AN-200
NSN: 5310-00-185-6375
FSC: 5310
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
functional_descriptionUSED WITH FD-205 WHICH IS PART OF FIBER OPTIC INTRUSION DETECTION SYSTEM (FOIDS 200)
reference_data_and_literature31S9-2GSS42-1
NSN5310-00-185-6375
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: AN-200 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD PITCH DIAMETERS: +3.8639 TO 3.8713 INCHES IN
•
HARDNESS RATING: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
•
THREAD QUANTITY PER INCH: 12
•
THREAD SERIES: UNS
•
NOMINAL THREAD SIZE: 3.918 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 1 CLASS
•
THREAD DIRECTION: RIGHT-HAND
•
NUT DIAMETER: 5.1875 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD PITCH DIAMETERS+3.8639 TO 3.8713 INCHES IN
HARDNESS RATING66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
THREAD QUANTITY PER INCH12
THREAD SERIESUNS
NOMINAL THREAD SIZE3.918 INCHES IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1 CLASS
THREAD DIRECTIONRIGHT-HAND
NUT DIAMETER5.1875 INCHES NOMINAL IN
DRIVE POINT QUANTITY4
DRIVE POINT WIDTH0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
38246Z10Interchangeable
interchangeable cross-reference
interchangeable
NP2T2Interchangeable
interchangeable cross-reference
interchangeable
HH-I-435Interchangeable
interchangeable cross-reference
interchangeable
M3786-8-137Interchangeable
interchangeable cross-reference
interchangeable
3824-6Interchangeable
interchangeable cross-reference
interchangeable
MS35923-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AN-200?
AN-200 is a NUT,PLAIN,ROUND.
What parts can replace AN-200?
There are 21 known substitutes for AN-200: 38246Z10, NP2T2, HH-I-435 and 18 more. Substitute compatibility should be verified for your specific system.
Is AN-200 still available?
AN-200 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026