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Technical Data Sheet
PartsTable / COMPONENT / 8-73-122
8-73-122 ✓ 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: HEXAGON, head_height: 0.312 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 0.688 INCHES MINIMUM IN, fastener_length: 1.375 INCHES NOMINAL 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 5306-00-735-0528, 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
8-73-122
NSN: 5306-00-735-0528
FSC: 5306
CAGE: 72447 — DANA COMMERCIAL VEHICLE MANUFACTURING, LLC DBA DANA COMMERCIAL VEHICLE PRODUCTS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.312 INCHES NOMINAL IN
thread_class2A A
thread_length0.688 INCHES MINIMUM IN
fastener_length1.375 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
width_between_flats0.750 INCHES NOMINAL IN
nominal_thread_diameter0.500 INCHES IN
minimum_tensile_strength150000 POUNDS PER SQUARE INCH LBS
NSN5306-00-735-0528
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 8-73-122 · 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
•
FEATURES PROVIDED: FINISHED HEAD
•
THREAD CLASS: 2A A
•
HEAD HEIGHT: 0.312 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 8 GRADE
•
THREAD SERIES DESIGNATOR: UNF
•
NOMINAL THREAD DIAMETER: 0.500 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-1222,GR 8 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
FEATURES PROVIDEDFINISHED HEAD
THREAD CLASS2A A
HEAD HEIGHT0.312 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 8 GRADE
THREAD SERIES DESIGNATORUNF
NOMINAL THREAD DIAMETER0.500 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-1222,GR 8 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
WIDTH BETWEEN FLATS0.750 INCHES NOMINAL IN
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
MIL-S-1222Upgraded Successor
successor cross-reference
successor
FFB575Upgraded Successor
successor cross-reference
successor
M1222B2N6C228GCNZEUpgraded Successor
successor cross-reference
successor
15X173Interchangeable
interchangeable cross-reference
interchangeable
316167Interchangeable
interchangeable cross-reference
interchangeable
11A8656Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8-73-122?
8-73-122 is a BOLT,MACHINE.
What parts can replace 8-73-122?
There are 10 known substitutes for 8-73-122: MIL-S-1222, FFB575, M1222B2N6C228GCNZE and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8-73-122?
8-73-122 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-735-0528. 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