PartsTable
Technical Data Sheet
1137-820T ✓ 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: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B, thread_series: UNF. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-2042, 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
1137-820T
NSN: 5310-00-275-2042
FSC: 5310
CAGE: 80020 — NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION JOINT BASE JBMDL (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNF
locking_featurePREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
surface_treatmentCADMIUM OR ZINC OVERALL
width_across_flats0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeFLAT
NSN5310-00-275-2042
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1137-820T · 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
WIDTH ACROSS FLATS: 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH: 20
THREAD SERIES: UNF
BEARING SURFACE TYPE: FLAT
NOMINAL THREAD SIZE: 0.500 INCHES IN
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH20
THREAD SERIESUNF
BEARING SURFACE TYPEFLAT
NOMINAL THREAD SIZE0.500 INCHES IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN OR PREVAILING TORQUE WITH NONMETALLIC INSERT
NUT STYLEHEXAGON
THREAD CLASS3B
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
W58XC4C12A-5Interchangeable
interchangeable cross-reference
interchangeable
1601-013-5Interchangeable
interchangeable cross-reference
interchangeable
607417-5Interchangeable
interchangeable cross-reference
interchangeable
853948Interchangeable
interchangeable cross-reference
interchangeable
17962MInterchangeable
interchangeable cross-reference
interchangeable
648392Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1137-820T?
1137-820T is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 1137-820T?
There are 14 known substitutes for 1137-820T: W58XC4C12A-5, 1601-013-5, 607417-5 and 11 more. Substitute compatibility should be verified for your specific system.
Is 1137-820T still available?
1137-820T is currently cancelled.
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