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PartsTable / COMPONENT / 111B1-8
111B1-8 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The LOCKNUT,PIPE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: PIPE LOCKNUT, nut_height: 0.185 INCHES NOMINAL IN, thread_class: 2B, thread_series: NPSL, 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 4730-00-350-9619, 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
111B1-8
NSN: 4730-00-350-9619
FSC: 4730
CAGE: 30327 — IMPERIAL (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_stylePIPE LOCKNUT
nut_height0.185 INCHES NOMINAL IN
thread_class2B
thread_seriesNPSL
thread_directionRIGHT-HAND
countersink_angle45.0 DEGREES NOMINAL NUT
width_across_flats0.690 INCHES NOMINAL IN
nominal_thread_size0.125 INCHES IN
packing_recess_depth0.040 INCHES NOMINAL IN
packing_recess_diameter0.500 INCHES NOMINAL IN
thread_quantity_per_inch27
NSN4730-00-350-9619
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 111B1-8 · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
COUNTERSINK ANGLE: 45.0 DEGREES NOMINAL NUT
•
THREAD DIRECTION: RIGHT-HAND
•
MATERIAL: COPPER ALLOY OVERALL
•
WIDTH ACROSS FLATS: 0.690 INCHES NOMINAL IN
•
PACKING RECESS DEPTH: 0.040 INCHES NOMINAL IN
•
THREAD CLASS: 2B
•
THREAD QUANTITY PER INCH: 27
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
COUNTERSINK ANGLE45.0 DEGREES NOMINAL NUT
THREAD DIRECTIONRIGHT-HAND
MATERIALCOPPER ALLOY OVERALL
WIDTH ACROSS FLATS0.690 INCHES NOMINAL IN
PACKING RECESS DEPTH0.040 INCHES NOMINAL IN
THREAD CLASS2B
THREAD QUANTITY PER INCH27
NOMINAL THREAD SIZE0.125 INCHES IN
NUT STYLEPIPE LOCKNUT
THREAD SERIESNPSL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
3139449-0084Interchangeable
interchangeable cross-reference
interchangeable
136693Interchangeable
interchangeable cross-reference
interchangeable
3007145-0Interchangeable
interchangeable cross-reference
interchangeable
10068293Interchangeable
interchangeable cross-reference
interchangeable
497Interchangeable
interchangeable cross-reference
interchangeable
473Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 111B1-8?
111B1-8 is a LOCKNUT,PIPE.
What parts can replace 111B1-8?
There are 24 known substitutes for 111B1-8: 3139449-0084, 136693, 3007145-0 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 111B1-8?
111B1-8 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-350-9619. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026