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Technical Data Sheet
PartsTable / COMPONENT / 77D1
77D1 ✓ 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 COUPLING,CLAMP,PIPE is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC GASKET, pipe_size_accommodated: 1.000 INCHES NOMINAL IN, end_type_for_which_designed: GROOVED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-3050, 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
77D1
NSN: 5310-00-010-3050
FSC: 5310
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC GASKET
segment_quantity2
pipe_size_accommodated1.000 INCHES NOMINAL IN
end_type_for_which_designedGROOVED
NSN5310-00-010-3050
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 77D1 · 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
•
NUT STYLE: CASTELLATED, HEXAGON
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 2B
•
MATERIAL: STEEL OVERALL
•
WIDTH ACROSS FLATS: 1.063 INCHES NOMINAL IN
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
NUT HEIGHT: 0.813 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLECASTELLATED, HEXAGON
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS2B
MATERIALSTEEL OVERALL
WIDTH ACROSS FLATS1.063 INCHES NOMINAL IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NUT HEIGHT0.813 INCHES NOMINAL IN
THREAD QUANTITY PER INCH16
THREAD SERIESUNF
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
77D1Interchangeable
interchangeable cross-reference
interchangeable
54Z8-10Interchangeable
interchangeable cross-reference
interchangeable
AN530-8-10Interchangeable
interchangeable cross-reference
interchangeable
P100-1Interchangeable
interchangeable cross-reference
interchangeable
GBR10Interchangeable
interchangeable cross-reference
interchangeable
AT2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 77D1?
77D1 is a COUPLING,CLAMP,PIPE.
What parts can replace 77D1?
There are 15 known substitutes for 77D1: 77D1, 54Z8-10, AN530-8-10 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 77D1?
77D1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-3050. 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