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3539751 — NIPPLE,BOSS

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

3539751: NIPPLE,BOSS.

The NIPPLE,BOSS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_class: 2A ALL ENDS A, connection_type: THREADED EXTERNAL BOSS ALL ENDS, connection_style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END, style_designator: PLAIN W/ BULKHEAD THREAD, nominal_thread_size: 1.312 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-087-4540, 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
3539751
NSN: 4730-01-087-4540
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 45152 — OSHKOSH CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_class2A ALL ENDS A
connection_typeTHREADED EXTERNAL BOSS ALL ENDS
connection_styleEXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
style_designatorPLAIN W/ BULKHEAD THREAD
nominal_thread_size1.312 INCHES ALL ENDS IN
nominal_overall_length2.130 INCHES IN
thread_series_designatorUNF ALL ENDS
furnished_items_and_quantity1 LOCKNUT AND 2 PREFORMED PACKING AND 1 FLAT WASHER
NSN4730-01-087-4540
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 3539751 · 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
•
FURNISHED ITEMS AND QUANTITY: 1 LOCKNUT AND 2 PREFORMED PACKING AND 1 FLAT WASHER
•
CONNECTION STYLE: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
•
NOMINAL OVERALL LENGTH: 2.130 INCHES IN
•
CONNECTION TYPE: THREADED EXTERNAL BOSS ALL ENDS
•
STYLE DESIGNATOR: PLAIN W/ BULKHEAD THREAD
•
NOMINAL THREAD SIZE: 1.312 INCHES ALL ENDS IN
•
THREAD CLASS: 2A ALL ENDS A
TECHNICAL CHARACTERISTICS
FURNISHED ITEMS AND QUANTITY1 LOCKNUT AND 2 PREFORMED PACKING AND 1 FLAT WASHER
CONNECTION STYLEEXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
CONNECTION STYLEDOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END
NOMINAL OVERALL LENGTH2.130 INCHES IN
CONNECTION TYPETHREADED EXTERNAL BOSS ALL ENDS
STYLE DESIGNATORPLAIN W/ BULKHEAD THREAD
NOMINAL THREAD SIZE1.312 INCHES ALL ENDS IN
THREAD CLASS2A ALL ENDS A
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNF ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 3
16-F50F50SReference document
Same NSN cross-reference
Reference document — Secondary reference
1386F93Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
4730PL0781600Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3539751?
3539751 is a NIPPLE,BOSS.
What parts can replace 3539751?
There are 3 known substitutes for 3539751: 16-F50F50S, 1386F93, 4730PL0781600. Substitute compatibility should be verified for your specific system.
What is the NSN for 3539751?
3539751 is cataloged in the U.S. Government catalog under NSN 4730-01-087-4540. 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.