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GTK100-121 — NUT,PLAIN,EXTENDED WASHER,HEXAGO

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

GTK100-121: NUT,PLAIN,EXTENDED WASHER,HEXAGO.

NUT,PLAIN,EXTENDED WASHER,HEXAGO. Key specifications include material: STEEL COMP 4340 OVERALL, nut_style: HEXAGON, thread_class: 3A A, thread_series: UNIFIED NATIONAL JOINT FINE (UNJF), overall_height: 0.800 INCHES NOMINAL IN, thread_direction: LEFT-HAND. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-147-7828, 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
GTK100-121
NSN: 5310-01-147-7828
FSC: 5310 — Nuts and Washers
CAGE: 57983 — GREER AERO LLC (USA)
SPECIFICATIONS
materialSTEEL COMP 4340 OVERALL
nut_styleHEXAGON
thread_class3A A
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
overall_height0.800 INCHES NOMINAL IN
thread_directionLEFT-HAND
washer_thickness0.200 INCHES NOMINAL IN
width_across_flats1.120 INCHES NOMINAL IN
nominal_thread_size0.750 INCHES IN
washer_outside_diameter0.9500 INCHES NOMINAL IN
thread_quantity_per_inch10
material_document_and_classificationMIL-S-6875 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-01-147-7828
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GTK100-121 · 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: 0.9500 INCHES NOMINAL IN
•
WIDTH ACROSS FLATS: 1.120 INCHES NOMINAL IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
WASHER THICKNESS: 0.200 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6875 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD DIRECTION: LEFT-HAND
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.800 INCHES NOMINAL IN
WASHER OUTSIDE DIAMETER0.9500 INCHES NOMINAL IN
WIDTH ACROSS FLATS1.120 INCHES NOMINAL IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
WASHER THICKNESS0.200 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6875 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD DIRECTIONLEFT-HAND
NOMINAL THREAD SIZE0.750 INCHES IN
NUT STYLEHEXAGON
THREAD CLASS3A A
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GTK100-121?
GTK100-121 is a NUT,PLAIN,EXTENDED WASHER,HEXAGO.
What is the NSN for GTK100-121?
GTK100-121 is cataloged in the U.S. Government catalog under NSN 5310-01-147-7828. 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.