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Technical Data Sheet
PartsTable / COMPONENT / 949-550PC27
949-550PC27 ✓ 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 NUT,PLAIN,ROUND is a the manufacturer industrial component. Key specifications include nut_style: ROUND, nut_diameter: 2.043 INCHES MINIMUM AND 2.073 INCHES MAXIMUM IN, nut_thickness: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN, thread_series: UNS, hardness_rating: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-185-6464, 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
949-550PC27
NSN: 5310-00-185-6464
FSC: 5310
CAGE: 92392 — ALLIS-CHALMERS CORP (USA)
SPECIFICATIONS
nut_styleROUND
nut_diameter2.043 INCHES MINIMUM AND 2.073 INCHES MAXIMUM IN
nut_thickness0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
thread_seriesUNS
hardness_rating66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
thread_directionRIGHT-HAND
drive_point_depth0.094 INCHES NOMINAL IN
drive_point_width0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
nominal_thread_size1.376 INCHES IN
drive_point_quantity4
thread_pitch_diameters+1.3399 TO 1.3439 INCHES IN
thread_quantity_per_inch18
NSN5310-00-185-6464
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 949-550PC27 · 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
•
DRIVE POINT WIDTH: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
•
THREAD QUANTITY PER INCH: 18
•
HARDNESS RATING: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
•
NOMINAL THREAD SIZE: 1.376 INCHES IN
•
THREAD SERIES: UNS
•
MATERIAL: STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OVERALL
•
DRIVE POINT DEPTH: 0.094 INCHES NOMINAL IN
•
NUT THICKNESS: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
DRIVE POINT WIDTH0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH18
HARDNESS RATING66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
NOMINAL THREAD SIZE1.376 INCHES IN
THREAD SERIESUNS
MATERIALSTEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OVERALL
DRIVE POINT DEPTH0.094 INCHES NOMINAL IN
NUT THICKNESS0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
DRIVE POINT QUANTITY4
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
7T1031Interchangeable
interchangeable cross-reference
interchangeable
FFB571TYPEAInterchangeable
interchangeable cross-reference
interchangeable
4209Interchangeable
interchangeable cross-reference
interchangeable
16440Interchangeable
interchangeable cross-reference
interchangeable
79-018-078-0825Interchangeable
interchangeable cross-reference
interchangeable
MS171472Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 949-550PC27?
949-550PC27 is a NUT,PLAIN,ROUND.
What parts can replace 949-550PC27?
There are 22 known substitutes for 949-550PC27: 7T1031, FFB571TYPEA, 4209 and 19 more. Substitute compatibility should be verified for your specific system.
Is 949-550PC27 still available?
949-550PC27 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026