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NAS1291C06M — NUT,SELF-LOCKING,EXTENDED WASHER

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

NAS1291C06M: NUT,SELF-LOCKING,EXTENDED WASHER.

NUT,SELF-LOCKING,EXTENDED WASHER. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: HEXAGON, temp_rating: 550.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC), overall_height: 0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-878-9518, 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
NAS1291C06M
NSN: 5310-00-878-9518
FSC: 5310 — Nuts and Washers
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleHEXAGON
temp_rating550.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
overall_height0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
washer_thickness0.010 INCHES MINIMUM IN
surface_treatmentPASSIVATE OVERALL
width_across_flats0.181 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
nominal_thread_size0.138 INCHES IN
NSN5310-00-878-9518
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: NAS1291C06M · 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
•
WASHER OUTSIDE DIAMETER: 0.244 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.181 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
TEMP RATING: 550.0 FAHRENHEIT NOMINAL DEGF
•
WASHER THICKNESS: 0.010 INCHES MINIMUM IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.115 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
WASHER OUTSIDE DIAMETER0.244 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.181 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
TEMP RATING550.0 FAHRENHEIT NOMINAL DEGF
WASHER THICKNESS0.010 INCHES MINIMUM IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.138 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
SURFACE TREATMENTPASSIVATE OVERALL
SUBSTITUTES & CROSS-REFERENCES 6
10088034Reference document
Same NSN cross-reference
Reference document — Informative reference only
FN1014M632Reference document
Same NSN cross-reference
Reference document — Secondary reference
5310PL1443788Reference document
Same NSN cross-reference
Reference document — Informative reference only
1138-123Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
H42L06Reference document
Same NSN cross-reference
Reference document — Secondary reference
947532-306Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NAS1291C06M?
NAS1291C06M is a NUT,SELF-LOCKING,EXTENDED WASHER.
What parts can replace NAS1291C06M?
There are 6 known substitutes for NAS1291C06M: 10088034, FN1014M632, 5310PL1443788 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for NAS1291C06M?
NAS1291C06M is cataloged in the U.S. Government catalog under NSN 5310-00-878-9518. 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.