PartsTable
Technical Data Sheet
12268561 ✓ 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 COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8640 OVERALL, nut_style: HEXAGON, thread_class: 2B, thread_series: UNF, overall_height: 1.160 INCHES MINIMUM AND 1.200 INCHES MAXIMUM IN, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-341-4122, 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
12268561
NSN: 5310-01-341-4122
FSC: 5310
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8640 OVERALL
nut_styleHEXAGON
thread_class2B
thread_seriesUNF
overall_height1.160 INCHES MINIMUM AND 1.200 INCHES MAXIMUM IN
hardness_rating26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
washer_thickness0.047 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
surface_treatmentZINC OVERALL
width_across_flats0.922 INCHES MINIMUM AND 0.939 INCHES MAXIMUM IN
nominal_thread_size0.625 INCHES IN
washer_outside_diameter1.230 INCHES MINIMUM IN
NSN5310-01-341-4122
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12268561 · 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
NUT STYLE: HEXAGON
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE: 0.625 INCHES IN
THREAD QUANTITY PER INCH: 18
THREAD SERIES: UNF
SURFACE TREATMENT: ZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633,TY 2,CL FE/ZN8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
NUT STYLEHEXAGON
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE0.625 INCHES IN
THREAD QUANTITY PER INCH18
THREAD SERIESUNF
SURFACE TREATMENTZINC OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633,TY 2,CL FE/ZN8 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
MATERIALSTEEL COMP 4130 OR STEEL COMP 4140 OR STEEL COMP 8640 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A322 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A331 ASSN STD 1ST MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
1104050-2Interchangeable
interchangeable cross-reference
interchangeable
1118075Interchangeable
interchangeable cross-reference
interchangeable
1104050-1Interchangeable
interchangeable cross-reference
interchangeable
11.04.05.05Interchangeable
Same NIIN cross-reference
interchangeable
9102Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 12268561?
12268561 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What parts can replace 12268561?
There are 5 known substitutes for 12268561: 1104050-2, 1118075, 1104050-1 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 12268561?
12268561 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-341-4122. This indicates validated use in U.S. government and defense supply chains.
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