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PartsTable / COMPONENT / T374
T374 ✓ 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 PILOT,VALVE SEAT REFACING is a the manufacturer industrial component. Key specifications include diameter: 1.246 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN, material: STEEL COMP 8640 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL, design_type: SOLID, overall_length: 4.047 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN, undercut_width: 0.056 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN, first_end_style: SQUARE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-773-2386, 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
T374
NSN: 5315-00-773-2386
FSC: 5315
CAGE: 74410 — SAF-HOLLAND, INC. (USA)
SPECIFICATIONS
diameter1.246 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
materialSTEEL COMP 8640 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL
design_typeSOLID
overall_length4.047 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
undercut_width0.056 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN
first_end_styleSQUARE
hardness_rating40.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM OVERALL
effective_length3.589 INCHES MINIMUM AND 3.609 INCHES MAXIMUM IN
lower_end_length4.000 INCHES NOMINAL IN
special_featuresUSE WITH HOLDER,SIOUX P/N 1702
style_designatorROUND
upper_end_length4.000 INCHES NOMINAL IN
NSN5315-00-773-2386
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: T374 · 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
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM OVERALL
•
FIRST END LOCATION: SQUARE END
•
MATERIAL: STEEL COMP 8640 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL
•
STYLE DESIGNATOR: GROOVE
•
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC ALL MATERIAL RESPONSES OVERALL
SPECIAL FEATURESCOUNTERBORED AND TAPPED ON ONE END
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 48.0 ROCKWELL C MAXIMUM OVERALL
FIRST END LOCATIONSQUARE END
MATERIALSTEEL COMP 8640 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL
STYLE DESIGNATORGROOVE
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.750 INCHES NOMINAL IN
OVERALL LENGTH4.047 INCHES MINIMUM AND 4.078 INCHES MAXIMUM IN
SECOND HOLE DIAMETER0.156 INCHES NOMINAL IN
HOLE ARRANGEMENT STYLEBOTH END DRILLED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
A8743Interchangeable
interchangeable cross-reference
interchangeable
SMD422742Interchangeable
interchangeable cross-reference
interchangeable
7374Interchangeable
interchangeable cross-reference
interchangeable
020002Interchangeable
interchangeable cross-reference
interchangeable
141-0281Interchangeable
interchangeable cross-reference
interchangeable
8409727Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T374?
T374 is a PILOT,VALVE SEAT REFACING.
What parts can replace T374?
There are 18 known substitutes for T374: A8743, SMD422742, 7374 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for T374?
T374 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-773-2386. 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