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Technical Data Sheet
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99B — ELBOW,PIPE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

99B: ELBOW,PIPE.

The ELBOW,PIPE is a the manufacturer industrial component. Key specifications include flow_angle: 90.0 DEGREES, nominal_thread_size: 0.250 INCHES ALL ENDS IN, thread_series_designator: NPT ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-586-3965, 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
99B
NSN: 5340-00-586-3965
NIINs: 005863965, 011583150
FSC: 5340 — Hardware, Commercial
CAGE: 19857 — THE ELECTRIC HEATER CO DBA HUBBELL ELECTRIC HEATER CO. (USA)
SPECIFICATIONS
flow_angle90.0 DEGREES
nominal_thread_size0.250 INCHES ALL ENDS IN
thread_series_designatorNPT ALL ENDS
NSN5340-00-586-3965
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 99B 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
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MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-895 MIL SPEC SINGLE MATERIAL RESPONSE CASING
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OPERATING PRESSURE: 70.0 KILOGRAMS PER SQUARE CENTIMETER MAXIMUM KG
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STANDARD DESIGNATOR: AMERICAN STANDARDS ASSOCIATION
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CORE DIAMETER: 0.625 INCHES NOMINAL IN
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FEATURES PROVIDED: CORE
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SIZE DESIGNATION: 1 INCH IN
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CORE FUSING TEMP RATING: 180.0 DEG FAHRENHEIT
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MATERIAL: COPPER ALLOY CASING
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-895 MIL SPEC SINGLE MATERIAL RESPONSE CASING
OPERATING PRESSURE70.0 KILOGRAMS PER SQUARE CENTIMETER MAXIMUM KG
STANDARD DESIGNATORAMERICAN STANDARDS ASSOCIATION
CORE DIAMETER0.625 INCHES NOMINAL IN
FEATURES PROVIDEDCORE
SIZE DESIGNATION1 INCH IN
CORE FUSING TEMP RATING180.0 DEG FAHRENHEIT
MATERIALCOPPER ALLOY CASING
THREAD SIZE AND SERIES/TYPE DESIGNATOR1-11 1/2 NPT
USAGE LOCATIONOUTSIDE
SUBSTITUTES & CROSS-REFERENCES 2
49MC1133N38PC8Reference document
Same NSN cross-reference
Reference document — Secondary reference
507438REVAPC86Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 99B?
99B is a ELBOW,PIPE.
What parts can replace 99B?
There are 2 known substitutes for 99B: 49MC1133N38PC8, 507438REVAPC86. Substitute compatibility should be verified for your specific system.
What is the NSN for 99B?
99B is cataloged in the U.S. Government catalog under NSN 5340-00-586-3965. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.