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QQ-N-281 GR400 — 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, thread_class: 3A A, overall_length: 2.750 INCHES NOMINAL IN, thread_direction: RIGHT-HAND, thread_quantity_per_inch: 20, thread_series_designator: UNRC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5305-01-226-0114, 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-281 GR400
NSN: 5305-01-226-0114
FSC: 5305
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialNICKEL ALLOY
thread_class3A A
overall_length2.750 INCHES NOMINAL IN
thread_directionRIGHT-HAND
thread_quantity_per_inch20
thread_series_designatorUNRC
nondefinitive_spec/std_data4 TYPE
departure_from_cited_documentMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMSOL INSTRUCTION FOR LEVEL 1 ITEMS
criticality_code_justificationZZZX
departure_from_cited_designatorMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
NSN5305-01-226-0114
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: QQ-N-281 GR400 · 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
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND 1/2X13X5 INLG SIZE AND 2A CLASS A
•
MATERIAL: NICKEL ALLOY OVERALL
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMSOL INSTRUCTION FOR LEVEL 1 ITEMS
•
CRITICALITY CODE JUSTIFICATION: ZZZW
TECHNICAL CHARACTERISTICS
NONDEFINITIVE SPEC/STD DATA1 TYPE AND 1/2X13X5 INLG SIZE AND 2A CLASS A
MATERIALNICKEL ALLOY OVERALL
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMSOL INSTRUCTION FOR LEVEL 1 ITEMS
CRITICALITY CODE JUSTIFICATIONZZZW
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
5/8-11UNC-2A X 4 1/2 INCHESL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
QQ-N-281 GRADE 400, CLASS AInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5/8-11UNC-2A X 4 1/2 INCHESInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
QQ-N-281 GRADE 400 CLASS AL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1/2-13UNC-2A X 1 1/2 INCHESL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1/4-20UNC-2A X 5/8 INCHL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is QQ-N-281 GR400?
QQ-N-281 GR400 is a STUD,CONTINUOUS THREAD.
What parts can replace QQ-N-281 GR400?
There are 28 known substitutes for QQ-N-281 GR400: 5/8-11UNC-2A X 4 1/2 INCHESL1, QQ-N-281 GRADE 400, CLASS A, 5/8-11UNC-2A X 4 1/2 INCHES and 25 more. Substitute compatibility should be verified for your specific system.
What is the NSN for QQ-N-281 GR400?
QQ-N-281 GR400 is cataloged in the Federal Logistics Information System under NSN 5305-01-226-0114. This indicates validated use in U.S. government and defense supply chains.
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Last verified: September 2026