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190731 — NIPPLE,PIPE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

190731: NIPPLE,PIPE.

The NIPPLE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL, hole_type: DRILLED, head_style: DISHED HEXAGON, head_height: 0.152 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN, thread_class: 3A A, hole_diameter: 0.076 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-196-1985, 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
190731
NSN: 4730-00-196-1985
NIINs: 001961985, 010135007
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 24617 — GENERAL MOTORS CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL
hole_typeDRILLED
head_styleDISHED HEXAGON
head_height0.152 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN
thread_class3A A
hole_diameter0.076 INCHES NOMINAL IN
hole_quantity3
thread_length0.375 INCHES NOMINAL IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.650 INCHES NOMINAL IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length0.265 INCHES MINIMUM AND 0.275 INCHES MAXIMUM FIRST SHOULDER IN
NSN4730-00-196-1985
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 190731 · 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
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
NOMINAL OVERALL LENGTH: 4.000 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: LONG
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B43 OR B42 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NOMINAL THREAD SIZE: 0.375 INCHES ALL ENDS IN
•
SPECIFICATION/STANDARD DATA: 81346-ASTM PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
•
MEDIA FOR WHICH DESIGNED: FLUID SINGLE RESPONSE
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
NOMINAL OVERALL LENGTH4.000 INCHES IN
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
STYLE DESIGNATORLONG
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B43 OR B42 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NOMINAL THREAD SIZE0.375 INCHES ALL ENDS IN
SPECIFICATION/STANDARD DATA81346-ASTM PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
MEDIA FOR WHICH DESIGNEDFLUID SINGLE RESPONSE
MATERIALCOPPER ALLOY 230 OR COPPER ALLOY OVERALL
THREAD SERIES DESIGNATORNPT ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 3
ASTM-B687Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
MS51846-50Reference document
Same NSN cross-reference
Reference document — Secondary reference
WWN351Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 190731?
190731 is a NIPPLE,PIPE.
What parts can replace 190731?
There are 3 known substitutes for 190731: ASTM-B687, MS51846-50, WWN351. Substitute compatibility should be verified for your specific system.
What is the NSN for 190731?
190731 is cataloged in the U.S. Government catalog under NSN 4730-00-196-1985. 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.