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Technical Data Sheet
PartsTable / COMPONENT / M1222RN8C228GHNN
M1222RN8C228GHNN ✓ 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 material: STEEL OVERALL, head_style: HEXAGON, head_height: 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.250 INCHES NOMINAL IN, fastener_length: 1.750 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 5305-01-314-6750, 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
M1222RN8C228GHNN
NSN: 5305-01-314-6750
FSC: 5305
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN
thread_class2A A
thread_length1.250 INCHES NOMINAL IN
fastener_length1.750 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
special_featuresMIL-DTL-1222 SPECIFICALLY STATED GRADES 8, 4340 AND A574 FASTENERS SHALL NOT BE COATED WITH ANODIC ZINC, METALLIC ALUMIMUM, ZINC CONTAINING PRIMER.
thread_directionRIGHT-HAND
width_between_flats0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
minimum_yield_strength130000 POUNDS PER SQUARE INCH LBS
nominal_thread_diameter0.500 INCHES IN
NSN5305-01-314-6750
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: M1222RN8C228GHNN · 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 CLASS: 2A A
•
MATERIAL: STEEL OVERALL
•
MINIMUM YIELD STRENGTH: 130000 POUNDS PER SQUARE INCH LBS
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE J429 GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
HEAD STYLE: HEXAGON
•
MINIMUM TENSILE STRENGTH: 150000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2A A
MATERIALSTEEL OVERALL
MINIMUM YIELD STRENGTH130000 POUNDS PER SQUARE INCH LBS
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE J429 GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HEAD STYLEHEXAGON
SPECIAL FEATURESMIL-DTL-1222 SPECIFICALLY STATED GRADES 8, 4340 AND A574 FASTENERS SHALL NOT BE COATED WITH ANODIC ZINC, METALLIC ALUMIMUM, ZINC CONTAINING PRIMER.
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH LBS
THREAD LENGTH1.250 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
MIL-DTL-1222,TYI,GR400L1Interchangeable
interchangeable cross-reference
interchangeable
1/2-13UNC-2A X 1 3/4INL1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222,TYI,GR400Interchangeable
interchangeable cross-reference
interchangeable
1/2-13UNC-2A X 1 3/4 IN.Interchangeable
Same NIIN cross-reference
interchangeable
MIL-DTL-1222Interchangeable
Same NIIN cross-reference
interchangeable
MIL-S-1222Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M1222RN8C228GHNN?
M1222RN8C228GHNN is a SCREW,CAP,HEXAGON HEAD.
What parts can replace M1222RN8C228GHNN?
There are 6 known substitutes for M1222RN8C228GHNN: MIL-DTL-1222,TYI,GR400L1, 1/2-13UNC-2A X 1 3/4INL1, MIL-DTL-1222,TYI,GR400 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M1222RN8C228GHNN?
M1222RN8C228GHNN is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-314-6750. 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