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PartsTable / COMPONENT / 993-149740 ITEM 18
993-149740 ITEM 18 ✓ 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 WASHER,SPRING TENSION is a the manufacturer industrial component. Key specifications include material: STEEL COMP 6150 OVERALL, hole_diameter: 1.016 INCHES NOMINAL IN, overall_height: 0.165 INCHES NOMINAL IN, outside_diameter: 2.000 INCHES NOMINAL IN, style_designator: SPRING TENSION, material_thickness: 0.118 INCHES NOMINAL 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 5310-01-119-7206, 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
993-149740 ITEM 18
NSN: 5310-01-119-7206
FSC: 5310
CAGE: 0DHG4 — GULF COAST HOLDINGS, INC DBA UNIDYNAMICS (USA)
SPECIFICATIONS
materialSTEEL COMP 6150 OVERALL
hole_diameter1.016 INCHES NOMINAL IN
overall_height0.165 INCHES NOMINAL IN
outside_diameter2.000 INCHES NOMINAL IN
style_designatorSPRING TENSION
material_thickness0.118 INCHES NOMINAL IN
NSN5310-01-119-7206
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 993-149740 ITEM 18 · 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 THICKNESS: 0.118 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPRING TENSION
•
MATERIAL: STEEL COMP 6150 OVERALL
•
HOLE DIAMETER: 1.016 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.118 INCHES NOMINAL IN
OUTSIDE DIAMETER2.000 INCHES NOMINAL IN
STYLE DESIGNATORSPRING TENSION
END ITEM IDENTIFICATIONW/S:HH-60L MEDIVAC; ELEVATORS, CARGO/WEAPONS; HELICOPTER, SEARCH AND RESCUE, HH-60H; HELICOPTER, CARRIER BASED ASW, SH-60F; HELICOPTER, SEAHAWK, H-60; AIRCRAFT, BLACK HAWK (MH-60K SPECIAL OPERATIONS AIRCRAFT); HELICOPTER, ELECTRONIC COUNTERMEASURES, EH-60A; SPRUANCE CLASS DD (963); KIDD CLASS DDG; MARINE HARDXWARE & HULL DOOORS A
MATERIALSTEEL COMP 6150 OVERALL
OVERALL HEIGHT0.165 INCHES NOMINAL IN
HOLE DIAMETER1.016 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
Z21Interchangeable
interchangeable cross-reference
interchangeable
65534Interchangeable
interchangeable cross-reference
interchangeable
P249D3022AALT2Interchangeable
interchangeable cross-reference
interchangeable
250Interchangeable
interchangeable cross-reference
interchangeable
40EInterchangeable
interchangeable cross-reference
interchangeable
0734007130Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 993-149740 ITEM 18?
993-149740 ITEM 18 is a WASHER,SPRING TENSION.
What parts can replace 993-149740 ITEM 18?
There are 7 known substitutes for 993-149740 ITEM 18: Z21, 65534, P249D3022AALT2 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 993-149740 ITEM 18?
993-149740 ITEM 18 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-119-7206. 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