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Technical Data Sheet
PartsTable / COMPONENT / 51778-10
51778-10 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SHAFT,SHOULDERED is a the manufacturer industrial component. Key specifications include material: STEEL COMP 316, end_similarity: NOT IDENTICAL, overall_length: 2.0310 INCHES NOMINAL IN, first_end_style: PLAIN, second_end_style: SQUARE AND INTERNALLY THREADED, special_features: 90 DEG CSK TO .175 IN. DIA, .164-32UNC-2B X .406 IN.

MIN. DEEP, SECOND END IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-610-6861, 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
51778-10
NSN: 5325-00-610-6861
FSC: 5325
CAGE: 49956 — RAYTHEON COMPANY DIV CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 316
step_quantity3
end_similarityNOT IDENTICAL
overall_length2.0310 INCHES NOMINAL IN
first_end_stylePLAIN
second_end_styleSQUARE AND INTERNALLY THREADED
special_features90 DEG CSK TO .175 IN. DIA, .164-32UNC-2B X .406 IN. MIN. DEEP, SECOND END IN
first_end_diameter0.5620 INCHES NOMINAL IN
second_end_diameter0.4340 INCHES NOMINAL IN
largest_step_diameter0.5620 INCHES NOMINAL IN
second_end_step_length0.1770 INCHES NOMINAL IN
end_item_identificationAVENGER CLASS MCM
NSN5325-00-610-6861
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 51778-10 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
XA6988-BInterchangeable
interchangeable cross-reference
interchangeable
M1-405Interchangeable
interchangeable cross-reference
interchangeable
14E1R63GPInterchangeable
interchangeable cross-reference
interchangeable
SE44BRIGHTInterchangeable
interchangeable cross-reference
interchangeable
8186973Interchangeable
interchangeable cross-reference
interchangeable
QS600M44SInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51778-10?
51778-10 is a SHAFT,SHOULDERED.
What parts can replace 51778-10?
There are 22 known substitutes for 51778-10: XA6988-B, M1-405, 14E1R63GP and 19 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51778-10?
51778-10 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-610-6861. 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