PartsTable
Technical Data Sheet
BS991PC11 ✓ 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,HEXAGON is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 OVERALL, nut_style: HEXAGON, nut_height: 0.250 INCHES NOMINAL IN, thread_class: 3B, thread_series: UNF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-3498, 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
BS991PC11
NSN: 5310-00-275-3498
FSC: 5310
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialCOPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 OVERALL
nut_styleHEXAGON
nut_height0.250 INCHES NOMINAL IN
thread_class3B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats1.062 INCHES NOMINAL IN
nominal_thread_size0.625 INCHES IN
bearing_surface_typeFLAT
thread_quantity_per_inch18
material_document_and_classificationQQ-B-639 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-275-3498
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BS991PC11 · 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 DIRECTION: RIGHT-HAND
WIDTH ACROSS FLATS: 1.062 INCHES NOMINAL IN
BEARING SURFACE TYPE: FLAT
THREAD SERIES: UNF
THREAD QUANTITY PER INCH: 18
NOMINAL THREAD SIZE: 0.625 INCHES IN
NUT STYLE: HEXAGON
THREAD CLASS: 3B
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS1.062 INCHES NOMINAL IN
BEARING SURFACE TYPEFLAT
THREAD SERIESUNF
THREAD QUANTITY PER INCH18
NOMINAL THREAD SIZE0.625 INCHES IN
NUT STYLEHEXAGON
THREAD CLASS3B
NUT HEIGHT0.250 INCHES NOMINAL IN
MATERIALCOPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
F18Interchangeable
interchangeable cross-reference
interchangeable
S11FTInterchangeable
interchangeable cross-reference
interchangeable
B107.1 CL3Interchangeable
interchangeable cross-reference
interchangeable
AS954Interchangeable
interchangeable cross-reference
interchangeable
405C18Interchangeable
interchangeable cross-reference
interchangeable
A18-3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy BS991PC11?
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 BS991PC11?
BS991PC11 is a NUT,PLAIN,HEXAGON.
What parts can replace BS991PC11?
There are 19 known substitutes for BS991PC11: F18, S11FT, B107.1 CL3 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BS991PC11?
BS991PC11 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-275-3498. 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 — BS991PC11