PartsTable
Technical Data Sheet
PartsTable / COMPONENT / BL8591
BL8591 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The BOOT,DUST AND MOISTURE SEAL is a the manufacturer industrial component. Key specifications include material: RUBBER SILICONE BODY, thread_class: 2B, thread_series: UNS, overall_height: 0.300 INCHES NOMINAL IN, mounting_method: INTEGRAL THREADED NUT, style_designator: CLOSED END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-018-9367, 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
BL8591
NSN: 5340-01-018-9367
FSC: 5340
CAGE: 08484 — BREEZE-EASTERN LLC (USA)
SPECIFICATIONS
materialRUBBER SILICONE BODY
thread_class2B
thread_seriesUNS
overall_height0.300 INCHES NOMINAL IN
mounting_methodINTEGRAL THREADED NUT
style_designatorCLOSED END
width_across_flats0.380 INCHES NOMINAL IN
nominal_thread_size0.250 INCHES IN
base_thread_locationEXTERNAL
opening_inside_diameter0.060 INCHES NOMINAL IN
mounting_device_quantity1
thread_quantity_per_inch40
NSN5340-01-018-9367
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BL8591 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD CLASS: 2B
•
MATERIAL: RUBBER SILICONE BODY
•
MOUNTING METHOD: INTEGRAL THREADED NUT
•
WIDTH ACROSS FLATS: 0.380 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 40
•
OPENING INSIDE DIAMETER: 0.060 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
THREAD SERIES: UNS
TECHNICAL CHARACTERISTICS (FLIS)
THREAD CLASS2B
MATERIALRUBBER SILICONE BODY
MOUNTING METHODINTEGRAL THREADED NUT
WIDTH ACROSS FLATS0.380 INCHES NOMINAL IN
THREAD QUANTITY PER INCH40
OPENING INSIDE DIAMETER0.060 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.250 INCHES IN
THREAD SERIESUNS
BASE THREAD LOCATIONEXTERNAL
STYLE DESIGNATORCLOSED END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
1906176-1Interchangeable
interchangeable cross-reference
interchangeable
N5030LInterchangeable
interchangeable cross-reference
interchangeable
50083Interchangeable
interchangeable cross-reference
interchangeable
MIL-B-5423/5Interchangeable
interchangeable cross-reference
interchangeable
SW1LN5030Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy BL8591?
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 BL8591?
BL8591 is a BOOT,DUST AND MOISTURE SEAL.
What parts can replace BL8591?
There are 5 known substitutes for BL8591: 1906176-1, N5030L, 50083 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BL8591?
BL8591 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-018-9367. 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 — BL8591

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