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Technical Data Sheet
PartsTable / COMPONENT / MIL-DTL-1222,TY I, ST C
MIL-DTL-1222,TY I, ST C ✓ 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 MIL-DTL-1222,TY I, ST C is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-359-1250, 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-DTL-1222,TY I, ST C
NSN: 5307-00-359-1250
FSC: 5307
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberMIL-DTL-1222,TY I, ST C
NSN5307-00-359-1250
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MIL-DTL-1222,TY I, ST C · 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: 14 STUD THREAD
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
THREAD LENGTH: 0.719 INCHES MINIMUM NUT THREAD IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: STM A193 ASSN STD SINGLE MATERIAL RESPONSE
•
THREAD CLASS: 3A NUT THREAD A
•
THREAD SERIES DESIGNATOR: UNF NUT THREAD
•
NOMINAL THREAD SIZE: 0.438 INCHES NUT THREAD IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH14 STUD THREAD
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD LENGTH0.719 INCHES MINIMUM NUT THREAD IN
MATERIAL DOCUMENT AND CLASSIFICATIONSTM A193 ASSN STD SINGLE MATERIAL RESPONSE
OVERALL LENGTH2.031 INCHES MINIMUM AND 2.093 INCHES MAXIMUM IN
THREAD CLASS3A NUT THREAD A
THREAD SERIES DESIGNATORUNF NUT THREAD
NOMINAL THREAD SIZE0.438 INCHES NUT THREAD IN
THREAD LENGTH0.562 INCHES MINIMUM STUD THREAD IN
MATERIALSTEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
38348Interchangeable
interchangeable cross-reference
interchangeable
N38348Interchangeable
interchangeable cross-reference
interchangeable
DIAPHRAGMInterchangeable
interchangeable cross-reference
interchangeable
MILP2911Interchangeable
interchangeable cross-reference
interchangeable
10310-72Interchangeable
interchangeable cross-reference
interchangeable
4X1103Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-DTL-1222,TY I, ST C?
MIL-DTL-1222,TY I, ST C is a MIL-DTL-1222,TY I, ST C.
What parts can replace MIL-DTL-1222,TY I, ST C?
There are 6 known substitutes for MIL-DTL-1222,TY I, ST C: 38348, N38348, DIAPHRAGM and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-DTL-1222,TY I, ST C?
MIL-DTL-1222,TY I, ST C is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-359-1250. 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