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12267640 — NUT,PLAIN,ROUND

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

12267640: NUT,PLAIN,ROUND.

The NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, nut_style: ROUND, nut_diameter: 6.750 INCHES NOMINAL IN, nut_thickness: 1.100 INCHES NOMINAL IN, thread_series: UNS, hardness_rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-080-3270, 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
12267640
NSN: 5310-01-080-3270
FSC: 5310 — Nuts and Washers
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
nut_styleROUND
nut_diameter6.750 INCHES NOMINAL IN
nut_thickness1.100 INCHES NOMINAL IN
thread_seriesUNS
hardness_rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND
drive_point_depth0.250 INCHES NOMINAL IN
drive_point_width0.610 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
small_end_diameter5.320 INCHES NOMINAL IN
undercut_thickness0.350 INCHES NOMINAL IN
nominal_thread_size5.106 INCHES IN
NSN5310-01-080-3270
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 12267640 · 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 SERIES: UNS
•
HARDNESS RATING: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
•
THREAD PITCH DIAMETERS: +5.0519 TO 5.0602 INCHES IN
•
DRIVE POINT WIDTH: 0.610 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 5.106 INCHES IN
•
NUT DIAMETER: 6.750 INCHES NOMINAL IN
•
DRIVE POINT DEPTH: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNS
HARDNESS RATING26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
THREAD PITCH DIAMETERS+5.0519 TO 5.0602 INCHES IN
DRIVE POINT WIDTH0.610 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE5.106 INCHES IN
NUT DIAMETER6.750 INCHES NOMINAL IN
DRIVE POINT DEPTH0.250 INCHES NOMINAL IN
UNDERCUT THICKNESS0.350 INCHES NOMINAL IN
NUT THICKNESS1.100 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
DAX11541Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12267640?
12267640 is a NUT,PLAIN,ROUND.
What parts can replace 12267640?
There is 1 known substitute for 12267640: DAX11541. Substitute compatibility should be verified for your specific system.
What is the NSN for 12267640?
12267640 is cataloged in the U.S. Government catalog under NSN 5310-01-080-3270. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.