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Technical Data Sheet
551189 ✓ 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 PIN,SHOULDER,HEADLESS is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT, case_style: RECESSED, seal_width: 8.0 MILLIMETERS NOMINAL MM, outside_diameter: 90.2 MILLIMETERS NOMINAL MM, special_features: RUBBER BASE PAINT/BORE-TITE/CAGEC 80201, surface_treatment: PAINT CASE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-020-2926, 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
551189
NSN: 5315-01-020-2926
FSC: 5315
CAGE: 99167 — HAMILTON SUNDSTRAND CORPORATION (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
case_styleRECESSED
seal_width8.0 MILLIMETERS NOMINAL MM
outside_diameter90.2 MILLIMETERS NOMINAL MM
special_featuresRUBBER BASE PAINT/BORE-TITE/CAGEC 80201
surface_treatmentPAINT CASE
housing_bore_diameter90.0 MILLIMETERS NOMINAL MM
sealing_element_styleVERTICAL
accommodated_shaft_diameter68.0 MILLIMETERS NOMINAL MM
NSN5315-01-020-2926
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 551189 · 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
STYLE DESIGNATOR: SHOULDER
SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL
SHANK LENGTH: 0.082 INCHES NOMINAL IN
SHOULDER DIAMETER: 0.2495 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN
FIRST END TAPER ANGLE: 40.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM
FIRST END STYLE: CHAMFERED
SHANK DIAMETER: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORSHOULDER
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
SHANK LENGTH0.082 INCHES NOMINAL IN
SHOULDER DIAMETER0.2495 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN
FIRST END TAPER ANGLE40.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM
FIRST END STYLECHAMFERED
OVERALL LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
SHANK DIAMETER0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
SECOND END STYLESQUARE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
551189Interchangeable
interchangeable cross-reference
interchangeable
00044Interchangeable
interchangeable cross-reference
interchangeable
00044 TYPE 2B CASE TYPE 1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 551189?
551189 is a PIN,SHOULDER,HEADLESS.
What parts can replace 551189?
There are 3 known substitutes for 551189: 551189, 00044, 00044 TYPE 2B CASE TYPE 1. Substitute compatibility should be verified for your specific system.
What is the NSN for 551189?
551189 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-020-2926. This indicates validated use in U.S. government and defense supply chains.
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