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Technical Data Sheet
PartsTable / COMPONENT / 7/8-9UNC-2BL1
7/8-9UNC-2BL1 ✓ 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 7/8-9UNC-2BL1 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-383-3376, 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
7/8-9UNC-2BL1
NSN: 5310-01-383-3376
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part Number7/8-9UNC-2BL1
NSN5310-01-383-3376
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7/8-9UNC-2BL1 · 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
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 9
•
NOMINAL THREAD SIZE: 0.875 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
CRITICALITY CODE JUSTIFICATIONZZZW
THREAD CLASS2B
THREAD QUANTITY PER INCH9
NOMINAL THREAD SIZE0.875 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
22600N PIECE 38Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222,TYIII,GR4,STYAInterchangeable
interchangeable cross-reference
interchangeable
TYIII,GR 4,STY A,1-8UNC-2BInterchangeable
interchangeable cross-reference
interchangeable
76749-13X2PCF7L1Interchangeable
interchangeable cross-reference
interchangeable
975-298PCF6L1Interchangeable
interchangeable cross-reference
interchangeable
975-240PCF7L1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7/8-9UNC-2BL1?
7/8-9UNC-2BL1 is a 7/8-9UNC-2BL1.
What parts can replace 7/8-9UNC-2BL1?
There are 25 known substitutes for 7/8-9UNC-2BL1: 22600N PIECE 38, MIL-DTL-1222,TYIII,GR4,STYA, TYIII,GR 4,STY A,1-8UNC-2B and 22 more. Substitute compatibility should be verified for your specific system.
Is 7/8-9UNC-2BL1 still available?
7/8-9UNC-2BL1 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026