PartsTable
Technical Data Sheet
29SFF1428 ✓ 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

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNF, overall_height: 0.222 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-027-9530, 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
29SFF1428
NSN: 5310-01-027-9530
FSC: 5310
CAGE: 82465 — MAC LEAN FOGG LOCK NUT CO (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNF
overall_height0.222 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OVERALL
width_across_flats0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
nominal_thread_size0.250 INCHES IN
washer_outside_diameter0.574 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
thread_quantity_per_inch28
surface_treatment_document_and_classificationQQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-01-027-9530
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 29SFF1428 · 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
NUT STYLE: HEXAGON
THREAD CLASS: 2B
WIDTH ACROSS FLATS: 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
NOMINAL THREAD SIZE: 0.250 INCHES IN
THREAD QUANTITY PER INCH: 28
THREAD SERIES: UNF
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEHEXAGON
THREAD CLASS2B
OVERALL HEIGHT0.222 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD QUANTITY PER INCH28
THREAD SERIESUNF
MATERIALSTEEL OVERALL
SURFACE TREATMENTCADMIUM OVERALL
WASHER OUTSIDE DIAMETER0.574 INCHES MINIMUM AND 0.594 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
601352Interchangeable
interchangeable cross-reference
interchangeable
ST10016Interchangeable
interchangeable cross-reference
interchangeable
77506Interchangeable
interchangeable cross-reference
interchangeable
MT206PPInterchangeable
interchangeable cross-reference
interchangeable
6206ZZMAXInterchangeable
interchangeable cross-reference
interchangeable
0DM206MFFInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 29SFF1428?
29SFF1428 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What parts can replace 29SFF1428?
There are 13 known substitutes for 29SFF1428: 601352, ST10016, 77506 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 29SFF1428?
29SFF1428 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-027-9530. This indicates validated use in U.S. government and defense supply chains.
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