PartsTable
Technical Data Sheet
1287741-1 ✓ 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,SELF-LOCKING,HEXAGON is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON LOCKING INSERT, nut_style: HEXAGON, nut_height: 0.109 INCHES NOMINAL IN, temp_rating: -55.0 CELSIUS MINIMUM AND 120.0 CELSIUS MAXIMUM DEGC, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-208-9261, 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
1287741-1
NSN: 5310-00-208-9261
FSC: 5310
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleHEXAGON
nut_height0.109 INCHES NOMINAL IN
temp_rating-55.0 CELSIUS MINIMUM AND 120.0 CELSIUS MAXIMUM DEGC
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
width_across_flats0.250 INCHES NOMINAL IN
nominal_thread_size0.112 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch40
NSN5310-00-208-9261
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1287741-1 · 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 CLASS: 3B
NOMINAL THREAD SIZE: 0.112 INCHES IN
BEARING SURFACE TYPE: CHAMFERED
MATERIAL: PLASTIC POLYAMIDE NYLON LOCKING INSERT
NUT HEIGHT: 0.109 INCHES NOMINAL IN
THREAD DIRECTION: RIGHT-HAND
TEMP RATING: -55.0 CELSIUS MINIMUM AND 120.0 CELSIUS MAXIMUM DEGC
WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS3B
NOMINAL THREAD SIZE0.112 INCHES IN
BEARING SURFACE TYPECHAMFERED
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
NUT HEIGHT0.109 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
TEMP RATING-55.0 CELSIUS MINIMUM AND 120.0 CELSIUS MAXIMUM DEGC
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
MATERIALSTEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 303 PLUS X NUT
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5640 ASSN STD ALL MATERIAL RESPONSES NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
272.394.003Interchangeable
interchangeable cross-reference
interchangeable
622-25PM50GInterchangeable
interchangeable cross-reference
interchangeable
0073-562P1Interchangeable
interchangeable cross-reference
interchangeable
7296279NTM40Interchangeable
Same NIIN cross-reference
interchangeable
79NTM40Interchangeable
Same NIIN cross-reference
interchangeable
TX93010-7Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1287741-1?
1287741-1 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 1287741-1?
There are 6 known substitutes for 1287741-1: 272.394.003, 622-25PM50G, 0073-562P1 and 3 more. Substitute compatibility should be verified for your specific system.
Is 1287741-1 still available?
1287741-1 is currently cancelled.
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