PartsTable
Technical Data Sheet

MIL-S-1222/QQ-M-281 — Technical Data Sheet

✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include nut_style: HEXAGON, nut_height: 0.438 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNIFIED NATIONAL COARSE (UNC), thread_direction: RIGHT-HAND, width_across_flats: 0.750 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 5310-01-147-8669, 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-S-1222/QQ-M-281
NSN: 5310-01-147-8669
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
nut_styleHEXAGON
nut_height0.438 INCHES NOMINAL IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
thread_directionRIGHT-HAND
width_across_flats0.750 INCHES NOMINAL IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeWASHER FACED
thread_quantity_per_inch13
nondefinitive_spec/std_dataB CLASS AND A STYLE AND 1 TYPE
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN5310-01-147-8669
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MIL-S-1222/QQ-M-281 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD DIRECTION: RIGHT-HAND
•
NONDEFINITIVE SPEC/STD DATA: B CLASS AND A STYLE AND 1 TYPE
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
WIDTH ACROSS FLATS: 0.750 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
BEARING SURFACE TYPE: WASHER FACED
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS
THREAD DIRECTIONRIGHT-HAND
NONDEFINITIVE SPEC/STD DATAB CLASS AND A STYLE AND 1 TYPE
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
WIDTH ACROSS FLATS0.750 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.500 INCHES IN
CRITICALITY CODE JUSTIFICATIONZZZY
BEARING SURFACE TYPEWASHER FACED
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH13
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
216-4363288MT-F44InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-S-1222/QQ-S-763InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
000.500-13UNC-2BInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-S-1222G 1/2IN 13UNCInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-S-1222GInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIL-DTL-1222InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MIL-S-1222/QQ-M-281?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MIL-S-1222/QQ-M-281?
MIL-S-1222/QQ-M-281 is a NUT,PLAIN,HEXAGON.
What parts can replace MIL-S-1222/QQ-M-281?
There are 13 known substitutes for MIL-S-1222/QQ-M-281: 216-4363288MT-F44, MIL-S-1222/QQ-S-763, 000.500-13UNC-2B and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-S-1222/QQ-M-281?
MIL-S-1222/QQ-M-281 is cataloged in the Federal Logistics Information System under NSN 5310-01-147-8669. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MIL-S-1222/QQ-M-281