PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 7/8-9UNC-2B
7/8-9UNC-2B ✓ 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-2B is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-244-7568, 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-2B
NSN: 5310-01-244-7568
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part Number7/8-9UNC-2B
NSN5310-01-244-7568
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 7/8-9UNC-2B · 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
•
THREAD QUANTITY PER INCH: 9
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
BEARING SURFACE TYPE: FLAT OR WASHER FACED
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
NOMINAL THREAD SIZE: 0.875 INCHES IN
•
WIDTH ACROSS FLATS: 1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTEM A 153 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH9
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
BEARING SURFACE TYPEFLAT OR WASHER FACED
CRITICALITY CODE JUSTIFICATIONZZZY
NOMINAL THREAD SIZE0.875 INCHES IN
WIDTH ACROSS FLATS1.269 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTEM A 153 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
THREAD DIRECTIONRIGHT-HAND
MATERIAL DOCUMENT AND CLASSIFICATION66 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NUT HEIGHT0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
MIL-S-1222G TY1Interchangeable
interchangeable cross-reference
interchangeable
3/4-10UNC-2AX2-1/2 LGInterchangeable
interchangeable cross-reference
interchangeable
501-4364087ITEM3Interchangeable
interchangeable cross-reference
interchangeable
216-4363288MT-F44Interchangeable
interchangeable cross-reference
interchangeable
1/2-13UNC-2BInterchangeable
interchangeable cross-reference
interchangeable
216-4363322 F34-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy 7/8-9UNC-2B?
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 7/8-9UNC-2B?
7/8-9UNC-2B is a 7/8-9UNC-2B.
What parts can replace 7/8-9UNC-2B?
There are 25 known substitutes for 7/8-9UNC-2B: MIL-S-1222G TY1, 3/4-10UNC-2AX2-1/2 LG, 501-4364087ITEM3 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7/8-9UNC-2B?
7/8-9UNC-2B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-244-7568. This indicates validated use in U.S. government and defense supply chains.
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 — 7/8-9UNC-2B

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026