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Technical Data Sheet
PartsTable / COMPONENT / 522C506-2131000
522C506-2131000 ✓ 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 SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include thread_class: 2A A, fastener_length: 2.650 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND, nominal_thread_diameter: 0.625 INCHES IN, thread_quantity_per_inch: 11, thread_series_designator: UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-494-6658, 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
522C506-2131000
NSN: 5305-01-494-6658
FSC: 5305
CAGE: 90099 — NORTHROP GRUMMAN SYSTEMS CORPORATION DIV MARINE SYSTEMS (USA)
SPECIFICATIONS
thread_class2A A
fastener_length2.650 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
nominal_thread_diameter0.625 INCHES IN
thread_quantity_per_inch11
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
nondefinitive_spec/std_data2 TYPE AND 400 GRADE
specification/standard_data81349-MIL-DTL-1222 GOVERNMENT SPECIFICATION
NSN5305-01-494-6658
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 522C506-2131000 · 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
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 400 GRADE
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
SPECIFICATION/STANDARD DATA: 81349-MIL-DTL-1222 GOVERNMENT SPECIFICATION
•
THREAD CLASS: 2A A
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD QUANTITY PER INCH: 11
•
FASTENER LENGTH: 2.650 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 400 GRADE
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SPECIFICATION/STANDARD DATA81349-MIL-DTL-1222 GOVERNMENT SPECIFICATION
THREAD CLASS2A A
NOMINAL THREAD DIAMETER0.625 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH11
FASTENER LENGTH2.650 INCHES MINIMUM AND 2.850 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
MIL-DTL-1222 TYPE1Interchangeable
interchangeable cross-reference
interchangeable
A040Interchangeable
interchangeable cross-reference
interchangeable
R506REVAPC26Interchangeable
interchangeable cross-reference
interchangeable
60-01-3719Interchangeable
interchangeable cross-reference
interchangeable
M1222RN10C244NANNInterchangeable
interchangeable cross-reference
interchangeable
90-12-5275Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 522C506-2131000?
522C506-2131000 is a SCREW,CAP,HEXAGON HEAD.
What parts can replace 522C506-2131000?
There are 12 known substitutes for 522C506-2131000: MIL-DTL-1222 TYPE1, A040, R506REVAPC26 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 522C506-2131000?
522C506-2131000 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-494-6658. 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