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PartsTable / COMPONENT / GGG-D-777 SZ1/4STD
GGG-D-777 SZ1/4STD ✓ 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 GGG-D-777 SZ1/4STD is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-663-0015, 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
GGG-D-777 SZ1/4STD
NSN: 5315-00-663-0015
FSC: 5315
CAGE: 80244 — GENERAL SERVICES ADMINISTRATION FEDERAL SUPPLY SERVICE (USA)
SPECIFICATIONS
Part NumberGGG-D-777 SZ1/4STD
NSN5315-00-663-0015
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GGG-D-777 SZ1/4STD · 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
•
SHANK LENGTH: 1.250 INCHES NOMINAL1.250 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
THREAD DIRECTION: RIGHT-HANDRIGHT-HAND
•
THREAD LENGTH: 0.375 INCHES NOMINAL0.375 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.250 INCHES0.250 INCHES IN
•
THREAD CLASS: 2A2A
•
STYLE DESIGNATOR: POWDER ACTUATED
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SHANK LENGTH1.250 INCHES NOMINAL1.250 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD DIRECTIONRIGHT-HANDRIGHT-HAND
THREAD LENGTH0.375 INCHES NOMINAL0.375 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.250 INCHES0.250 INCHES IN
THREAD CLASS2A2A
STYLE DESIGNATORPOWDER ACTUATED
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATA1/4 INCH SIZE AND D STYLE IN
OVERALL LENGTH1.625 INCHES NOMINAL1.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
2411Interchangeable
interchangeable cross-reference
interchangeable
GGGD777Interchangeable
interchangeable cross-reference
interchangeable
2426Interchangeable
interchangeable cross-reference
interchangeable
E38933-25PC24-26Interchangeable
interchangeable cross-reference
interchangeable
E38933-7PC56Interchangeable
interchangeable cross-reference
interchangeable
389935PC24-26Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GGG-D-777 SZ1/4STD?
GGG-D-777 SZ1/4STD is a GGG-D-777 SZ1/4STD.
What parts can replace GGG-D-777 SZ1/4STD?
There are 20 known substitutes for GGG-D-777 SZ1/4STD: 2411, GGGD777, 2426 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GGG-D-777 SZ1/4STD?
GGG-D-777 SZ1/4STD is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-663-0015. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026