PartsTable
Technical Data Sheet
870-1221 ✓ 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,ASSEMBLED WASHER is a the manufacturer industrial component. Key specifications include color: BLACK SINGLE SIDE INSCRIPTION BACKGROUND, width: 13.125 INCHES NOMINAL IN, length: 4.250 INCHES NOMINAL IN, material: ALUMINUM ALLOY, thickness: 0.030 INCHES NOMINAL IN, attachment_method: HOLE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-052-3632, 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
870-1221
NSN: 5310-00-052-3632
FSC: 5310
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
colorBLACK SINGLE SIDE INSCRIPTION BACKGROUND
width13.125 INCHES NOMINAL IN
length4.250 INCHES NOMINAL IN
materialALUMINUM ALLOY
thickness0.030 INCHES NOMINAL IN
inscriptionPARTIAL LEGEND,SEMI TRAILER,WRECKER,12 TON,4 WHEEL,M-270,ORDNANCE STOCK NO. G2802-835-8754,MANUFACTURED BY ---,MFG. SERIAL NO. ---, LOCATION NOT OTHERWISE SPECIFIED
attachment_methodHOLE
basic_shape_styleRECTANGULAR
surface_treatmentANODIZE
marking_designationLEGEND LOCATION NOT OTHERWISE SPECIFIED
environmental_protectionABRASION RESISTANT AND ACCELERATED LIGHT AND ACID RESISTANT AND HEAT AND SALT SPRAY RESISTANT AND WEATHER RESISTANT
material_document_and_classificationQQ-A-250/1, ALLOY 1100 FED SPEC SINGLE MATERIAL RESPONSE
NSN5310-00-052-3632
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 870-1221 · 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
WASHER OUTSIDE DIAMETER: 0.375 INCHES NOMINAL IN
THREAD QUANTITY PER INCH: 32
NOMINAL THREAD SIZE: 0.164 INCHES IN
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
MATERIAL: STEEL COMP 1020 OVERALL
NUT HEIGHT: 0.156 INCHES NOMINAL IN
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
WASHER OUTSIDE DIAMETER0.375 INCHES NOMINAL IN
THREAD QUANTITY PER INCH32
NOMINAL THREAD SIZE0.164 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL COMP 1020 OVERALL
NUT HEIGHT0.156 INCHES NOMINAL IN
THREAD CLASS2B
OVERALL HEIGHT0.176 INCHES NOMINAL IN
NUT STYLEEXTERNAL TOOTH
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
511-081800-00Interchangeable
interchangeable cross-reference
interchangeable
5310PL0995638Interchangeable
interchangeable cross-reference
interchangeable
210-0458-00Interchangeable
interchangeable cross-reference
interchangeable
9226Interchangeable
interchangeable cross-reference
interchangeable
141284Interchangeable
interchangeable cross-reference
interchangeable
51363-R PC7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
Ready to buy 870-1221?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 870-1221?
870-1221 is a NUT,PLAIN,ASSEMBLED WASHER.
What parts can replace 870-1221?
There are 25 known substitutes for 870-1221: 511-081800-00, 5310PL0995638, 210-0458-00 and 22 more. Substitute compatibility should be verified for your specific system.
Is 870-1221 still available?
870-1221 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 870-1221