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Technical Data Sheet
PartsTable / COMPONENT / 5-16 18X8IN
5-16 18X8IN ✓ 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 BOLT,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: SQUARE, head_height: 0.186 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.125 INCHES MINIMUM IN, fastener_length: 8.000 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-655-7504, 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
5-16 18X8IN
NSN: 5306-00-655-7504
FSC: 5306
CAGE: 47562 — GAGE CO THE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleSQUARE
head_height0.186 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN
thread_class2A A
thread_length1.125 INCHES MINIMUM IN
fastener_length8.000 INCHES NOMINAL IN
hardness_rating95.0 ROCKWELL B MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedUNFINISHED HEAD
surface_treatmentZINC OVERALL
width_between_flats0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
nominal_thread_diameter0.312 INCHES IN
NSN5306-00-655-7504
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 5-16 18X8IN · 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 QUANTITY PER INCH: 18
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 1 GRADE
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD LENGTH: 1.125 INCHES MINIMUM IN
•
HEAD HEIGHT: 0.186 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN
•
FEATURES PROVIDED: UNFINISHED HEAD
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH18
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-Z-325,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1 GRADE
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD LENGTH1.125 INCHES MINIMUM IN
HEAD HEIGHT0.186 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN
FEATURES PROVIDEDUNFINISHED HEAD
HEAD STYLESQUARE
WIDTH BETWEEN FLATS0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
FFB575Upgraded Successor
successor cross-reference
successor
C3-378Upgraded Successor
successor cross-reference
successor
24-026Upgraded Successor
successor cross-reference
successor
FFB575TYPE1GRADE1Interchangeable
interchangeable cross-reference
interchangeable
MS35355-141Interchangeable
interchangeable cross-reference
interchangeable
3-4 10X1INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5-16 18X8IN?
5-16 18X8IN is a BOLT,MACHINE.
What parts can replace 5-16 18X8IN?
There are 6 known substitutes for 5-16 18X8IN: FFB575, C3-378, 24-026 and 3 more. Substitute compatibility should be verified for your specific system.
Is 5-16 18X8IN still available?
5-16 18X8IN 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