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PartsTable / COMPONENT / QQ-N-281DCLASSAALLOY400
QQ-N-281DCLASSAALLOY400 ✓ 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,PLAIN is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY 400, thread_class: 3A NUT THREAD A, thread_length: 1.312 INCHES MINIMUM STUD THREAD IN, overall_length: 3.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND STUD THREAD, nominal_thread_size: 0.875 INCHES STUD THREAD 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 5307-00-248-7987, 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
QQ-N-281DCLASSAALLOY400
NSN: 5307-00-248-7987
FSC: 5307
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialNICKEL ALLOY 400
thread_class3A NUT THREAD A
thread_length1.312 INCHES MINIMUM STUD THREAD IN
overall_length3.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.875 INCHES STUD THREAD IN
thread_quantity_per_inch9 NUT THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
nondefinitive_spec/std_data1 TYPE AND A STYLE
material_document_and_classificationQQ-N-281,CL A FED SPEC SINGLE MATERIAL RESPONSE
NSN5307-00-248-7987
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: QQ-N-281DCLASSAALLOY400 · 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 LENGTH: 2.000 INCHES MINIMUM NUT THREAD IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) NUT THREAD
•
THREAD CLASS: 3A NUT THREAD A
•
MATERIAL: NICKEL ALLOY 400
•
THREAD QUANTITY PER INCH: 9 NUT THREAD
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH2.000 INCHES MINIMUM NUT THREAD IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) NUT THREAD
THREAD CLASS3A NUT THREAD A
OVERALL LENGTH3.750 INCHES NOMINAL IN
MATERIALNICKEL ALLOY 400
THREAD QUANTITY PER INCH9 NUT THREAD
THREAD LENGTH1.312 INCHES MINIMUM STUD THREAD IN
THREAD CLASS5A STUD THREAD A
NOMINAL THREAD SIZE0.875 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.875 INCHES NUT THREAD IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
MIL-S-1222HInterchangeable
interchangeable cross-reference
interchangeable
MS35311-189Interchangeable
interchangeable cross-reference
interchangeable
FF-S-85Interchangeable
interchangeable cross-reference
interchangeable
5/8-11 UNC-2A X 3.00 LGInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222JInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222 TYPE 1 STYLE AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is QQ-N-281DCLASSAALLOY400?
QQ-N-281DCLASSAALLOY400 is a STUD,PLAIN.
What parts can replace QQ-N-281DCLASSAALLOY400?
There are 17 known substitutes for QQ-N-281DCLASSAALLOY400: MIL-S-1222H, MS35311-189, FF-S-85 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for QQ-N-281DCLASSAALLOY400?
QQ-N-281DCLASSAALLOY400 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5307-00-248-7987. 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