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PartsTable / COMPONENT / MIL-S-1222TY1 20UNC
MIL-S-1222TY1 20UNC ✓ 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 COMP 416 OVERALL, head_style: HEXAGON, head_height: 0.591 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 1.750 INCHES MINIMUM IN, fastener_length: 3.500 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 5306-00-273-6098, 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
MIL-S-1222TY1 20UNC
NSN: 5306-00-273-6098
FSC: 5306
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL COMP 416 OVERALL
head_styleHEXAGON
head_height0.591 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
thread_class2A A
thread_length1.750 INCHES MINIMUM IN
fastener_length3.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedUNFINISHED HEAD
surface_treatmentPASSIVATE OVERALL
width_between_flats1.450 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
nominal_thread_diameter1.000 INCHES IN
thread_quantity_per_inch8
NSN5306-00-273-6098
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MIL-S-1222TY1 20UNC · 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
•
NOMINAL THREAD DIAMETER: 1.000 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
HEAD STYLE: HEXAGON
•
WIDTH BETWEEN FLATS: 1.450 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
THREAD CLASS: 2A A
•
HEAD HEIGHT: 0.591 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 416 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER1.000 INCHES IN
THREAD DIRECTIONRIGHT-HAND
HEAD STYLEHEXAGON
WIDTH BETWEEN FLATS1.450 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
THREAD CLASS2A A
HEAD HEIGHT0.591 INCHES MINIMUM AND 0.627 INCHES MAXIMUM IN
MATERIALSTEEL COMP 416 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
FEATURES PROVIDEDUNFINISHED HEAD
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
1427070Upgraded Successor
successor cross-reference
successor
SP20889Upgraded Successor
successor cross-reference
successor
M1222B2N8C220GFNZXUpgraded Successor
successor cross-reference
successor
146440Upgraded Successor
successor cross-reference
successor
MIL-DTL-1222JUpgraded Successor
successor cross-reference
successor
M1222RN8C264GFNNUpgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-S-1222TY1 20UNC?
MIL-S-1222TY1 20UNC is a BOLT,MACHINE.
What parts can replace MIL-S-1222TY1 20UNC?
There are 20 known substitutes for MIL-S-1222TY1 20UNC: 1427070, SP20889, M1222B2N8C220GFNZX and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-S-1222TY1 20UNC?
MIL-S-1222TY1 20UNC is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-273-6098. 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