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7/8-9UNC-3A X 51/2 TYIV CLASS — 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: NICKEL ALLOY 400, thread_class: 3A LOCATION NOT OTHERWISE SPECIFIED A, overall_length: 5.500 INCHES NOMINAL IN, thread_direction: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED, nominal_thread_size: 0.875 INCHES LOCATION NOT OTHERWISE SPECIFIED IN, thread_quantity_per_inch: 9 LOCATION NOT OTHERWISE SPECIFIED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5307-01-306-7533, 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
7/8-9UNC-3A X 51/2 TYIV CLASS
NSN: 5307-01-306-7533
FSC: 5307
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialNICKEL ALLOY 400
thread_class3A LOCATION NOT OTHERWISE SPECIFIED A
overall_length5.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
nominal_thread_size0.875 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
thread_quantity_per_inch9 LOCATION NOT OTHERWISE SPECIFIED
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) LOCATION NOT OTHERWISE SPECIFIED
nondefinitive_spec/std_dataIV TYPE
criticality_code_justificationZZZX
departure_from_cited_designatorMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
material_document_and_classificationQQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
NSN5307-01-306-7533
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 7/8-9UNC-3A X 51/2 TYIV CLASS · 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: 9 LOCATION NOT OTHERWISE SPECIFIED
•
NONDEFINITIVE SPEC/STD DATA: IV TYPE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
•
NOMINAL THREAD SIZE: 0.875 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
•
CRITICALITY CODE JUSTIFICATION: ZZZX
•
DEPARTURE FROM CITED DESIGNATOR: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
THREAD DIRECTION: RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
TECHNICAL CHARACTERISTICS
THREAD QUANTITY PER INCH9 LOCATION NOT OTHERWISE SPECIFIED
NONDEFINITIVE SPEC/STD DATAIV TYPE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281,CL A,GR 400 FED SPEC SINGLE MATERIAL RESPONSE
NOMINAL THREAD SIZE0.875 INCHES LOCATION NOT OTHERWISE SPECIFIED IN
CRITICALITY CODE JUSTIFICATIONZZZX
DEPARTURE FROM CITED DESIGNATORMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
THREAD DIRECTIONRIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED
OVERALL LENGTH5.500 INCHES NOMINAL IN
THREAD CLASS3A LOCATION NOT OTHERWISE SPECIFIED A
MATERIALNICKEL ALLOY 400
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
7/8-9UNC-2A X 4IN CLASS A TYPL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS35311-217InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MS35311-217L1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-DTL-1222 QQ-N-281 GR400L1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3/4-10UNC-2A X 2 3/4 TYPE 1 CLL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-DTL-1222 QQ-N-281 GR400InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7/8-9UNC-3A X 51/2 TYIV CLASS?
7/8-9UNC-3A X 51/2 TYIV CLASS is a STUD,CONTINUOUS THREAD.
What parts can replace 7/8-9UNC-3A X 51/2 TYIV CLASS?
There are 18 known substitutes for 7/8-9UNC-3A X 51/2 TYIV CLASS: 7/8-9UNC-2A X 4IN CLASS A TYPL1, MS35311-217, MS35311-217L1 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7/8-9UNC-3A X 51/2 TYIV CLASS?
7/8-9UNC-3A X 51/2 TYIV CLASS is cataloged in the Federal Logistics Information System under NSN 5307-01-306-7533. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: October 2026