PartsTable
Technical Data Sheet
Download PDF

BST-N4 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

BST-N4: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include leg_length: 0.969 INCHES NOMINAL IN, overall_length: 1.938 INCHES NOMINAL IN, connection_type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION, connection_style: PLAIN ALL ENDS, style_designator: MALE COUPLING HALF, nominal_thread_size: 0.500 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-851-3255, 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
BST-N4
NSN: 4730-00-851-3255
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78JK3 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV QUICK COUPLING DIVISION (USA)
SPECIFICATIONS
leg_length0.969 INCHES NOMINAL IN
overall_length1.938 INCHES NOMINAL IN
connection_typeTHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.500 INCHES ALL ENDS IN
quick_disconnect_methodPUSH-PULL ALL ENDS
thread_series_designatorNPTF ALL ENDS
quick_disconnect_nominal_size0.422 INCHES ALL ENDS IN
NSN4730-00-851-3255
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: BST-N4 · 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 ALL ENDS
•
CONNECTION TYPE: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION
•
STYLE DESIGNATOR: MALE COUPLING HALF
•
QUICK DISCONNECT NOMINAL SIZE: 0.422 INCHES ALL ENDS IN
•
LEG LENGTH: 0.969 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
CONNECTION TYPEEXTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH1.938 INCHES NOMINAL IN
QUICK DISCONNECT NOMINAL SIZE0.422 INCHES ALL ENDS IN
LEG LENGTH0.969 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
SPECIAL FEATURESAS PER FIIG THE RESPONSE FOR BRASS IS CUB000, NOTE THAT THE BODY MATERIAL IS BRASS, THEREFORE THE MRC MATT IS NOT BEING RESPONDED TO, AS THE TIR WILL READ COPPER ALLOY, AND THIS COULD CAUSE CONFUSION.
QUICK DISCONNECT METHODPUSH-PULL ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 5
10185913Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
50FPBSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7746653P73Reference document
Same NSN cross-reference
Reference document — Secondary reference
4-FP-BReference document
Same NSN cross-reference
Reference document — Secondary reference
B4T26Reference 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
Ready to buy BST-N4?
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 BST-N4?
BST-N4 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace BST-N4?
There are 5 known substitutes for BST-N4: 10185913, 50FPB, 7746653P73 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for BST-N4?
BST-N4 is cataloged in the U.S. Government catalog under NSN 4730-00-851-3255. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — BST-N4