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MILS1222TYIV1 1/4-8UN-2AX8IN — Technical Data Sheet

✓ 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 STUD,CONTINUOUS THREAD is a the manufacturer industrial component. Key specifications include material: STEEL, overall_length: 8.000 INCHES NOMINAL IN, hardness_rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM, features_provided: CASEHARDENED, departure_from_cited_document: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS, criticality_code_justification: ZZZW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5307-01-050-1584, 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
MILS1222TYIV1 1/4-8UN-2AX8IN
NSN: 5307-01-050-1584
FSC: 5307
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL
overall_length8.000 INCHES NOMINAL IN
hardness_rating25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
features_providedCASEHARDENED
departure_from_cited_documentMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
criticality_code_justificationZZZW
NSN5307-01-050-1584
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MILS1222TYIV1 1/4-8UN-2AX8IN · 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
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
HARDNESS RATING: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
•
MATERIAL: STEEL
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
FEATURES PROVIDED: CASEHARDENED
TECHNICAL CHARACTERISTICS
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
HARDNESS RATING25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
OVERALL LENGTH8.000 INCHES NOMINAL IN
MATERIALSTEEL
CRITICALITY CODE JUSTIFICATIONZZZW
FEATURES PROVIDEDCASEHARDENED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
ASTM-A193 GRADE B16L1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-DTL-1222 TYPE III STYLE DInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
ASTM-A193 GRADE B16InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-DTL-1222InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-DTL-1222 TYPE IVL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
B16 1/2 13UNC2AX1 3/4INLGL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILS1222TYIV1 1/4-8UN-2AX8IN?
MILS1222TYIV1 1/4-8UN-2AX8IN is a STUD,CONTINUOUS THREAD.
What parts can replace MILS1222TYIV1 1/4-8UN-2AX8IN?
There are 12 known substitutes for MILS1222TYIV1 1/4-8UN-2AX8IN: ASTM-A193 GRADE B16L1, MIL-DTL-1222 TYPE III STYLE D, ASTM-A193 GRADE B16 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILS1222TYIV1 1/4-8UN-2AX8IN?
MILS1222TYIV1 1/4-8UN-2AX8IN is cataloged in the Federal Logistics Information System under NSN 5307-01-050-1584. This indicates validated use in U.S. government and defense supply chains.
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Last verified: October 2026