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33291 ✓ Verified by PartsTable
Lindy · 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 COLLAR is a Lindy industrial component. Key specifications include material: NICKEL ALLOY FLOW CONTROL DEVICE, body_material: COPPER ALLOY, connection_type: FLANGE, ROUND W/HOLES, flange_face_design: PLAIN, flow_control_device: DISK. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-123-5719, 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
33291
NSN: 5315-01-123-5719
FSC: 5315
CAGE: 26136 — KEARFLEX ENGINEERING COMPANY (USA)
SPECIFICATIONS
materialNICKEL ALLOY FLOW CONTROL DEVICE
body_materialCOPPER ALLOY
valve_quantity7
connection_typeFLANGE, ROUND W/HOLES
flange_face_designPLAIN
flow_control_deviceDISK
end_connection_quantity9
NSN5315-01-123-5719
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 33291 · Lindy ⚠ 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
•
SHANK LENGTH: 0.500 INCHES NOMINAL IN
•
MATERIAL: PLASTIC OVERALL
•
STYLE DESIGNATOR: SHOULDER
•
MATERIAL DOCUMENT AND CLASSIFICATION: LP-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.185 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
•
SECOND SHANK LENGTH: 0.125 INCHES NOMINAL IN
•
FIRST END STYLE: SQUARE
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
TECHNICAL CHARACTERISTICS (FLIS)
SHANK LENGTH0.500 INCHES NOMINAL IN
MATERIALPLASTIC OVERALL
STYLE DESIGNATORSHOULDER
MATERIAL DOCUMENT AND CLASSIFICATIONLP-410 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SHOULDER DIAMETER0.185 INCHES MINIMUM AND 0.189 INCHES MAXIMUM IN
SECOND SHANK LENGTH0.125 INCHES NOMINAL IN
FIRST END STYLESQUARE
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
OVERALL LENGTH0.812 INCHES NOMINAL IN
SECOND SHANK DIAMETER0.118 INCHES MINIMUM AND 0.122 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
33291Interchangeable
interchangeable cross-reference
interchangeable
27018Interchangeable
interchangeable cross-reference
interchangeable
00320 33300Interchangeable
interchangeable cross-reference
interchangeable
33291FIND NO 1Interchangeable
interchangeable cross-reference
interchangeable
33291FIND NO 6Interchangeable
interchangeable cross-reference
interchangeable
00320 33305Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 33291?
33291 is a COLLAR manufactured by Lindy.
What parts can replace 33291?
There are 7 known substitutes for 33291: 33291, 27018, 00320 33300 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 33291?
33291 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-01-123-5719. 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