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20542R1 — NUT,SELF-LOCKING,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

20542R1: NUT,SELF-LOCKING,HEXAGON.

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: 1.406 INCHES MINIMUM AND 1.532 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UN, locking_feature: PREVAILING TORQUE ALL METAL DESIGN. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-180-9110, 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
20542R1
NSN: 5310-01-180-9110
FSC: 5310 — Nuts and Washers
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON LOCKING INSERT
nut_styleHEXAGON
nut_height1.406 INCHES MINIMUM AND 1.532 INCHES MAXIMUM IN
thread_class2B
thread_seriesUN
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionLEFT-HAND
width_across_flats2.715 INCHES MINIMUM AND 2.762 INCHES MAXIMUM IN
nominal_thread_size1.750 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch12
NSN5310-01-180-9110
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 20542R1 · 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: 2.715 INCHES MINIMUM AND 2.762 INCHES MAXIMUM IN
•
THREAD SERIES: UN
•
THREAD DIRECTION: LEFT-HAND
•
NOMINAL THREAD SIZE: 1.750 INCHES IN
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
NUT HEIGHT: 1.406 INCHES MINIMUM AND 1.532 INCHES MAXIMUM IN
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS
WIDTH ACROSS FLATS2.715 INCHES MINIMUM AND 2.762 INCHES MAXIMUM IN
THREAD SERIESUN
THREAD DIRECTIONLEFT-HAND
NOMINAL THREAD SIZE1.750 INCHES IN
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT HEIGHT1.406 INCHES MINIMUM AND 1.532 INCHES MAXIMUM IN
NUT STYLEHEXAGON
THREAD CLASS2B
THREAD QUANTITY PER INCH12
MATERIALPLASTIC POLYAMIDE NYLON LOCKING INSERT
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
VL7694Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 20542R1?
20542R1 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 20542R1?
There is 1 known substitute for 20542R1: VL7694. Substitute compatibility should be verified for your specific system.
What is the NSN for 20542R1?
20542R1 is cataloged in the U.S. Government catalog under NSN 5310-01-180-9110. 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.