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BST-1 — COUPLING HALF,QUICK DISCONNECT

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

BST-1: COUPLING HALF,QUICK DISCONNECT.

The COUPLING HALF,QUICK DISCONNECT is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, leg_length: 0.203 INCHES NOMINAL IN, overall_length: 1.000 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN, connection_type: INTERNAL QUICK DISCONNECT ALL ENDS, connection_style: PLAIN ALL ENDS, style_designator: MALE COUPLING HALF. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-042-5266, 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-1
NSN: 4730-01-042-5266
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 78JK3 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV QUICK COUPLING DIVISION (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
leg_length0.203 INCHES NOMINAL IN
overall_length1.000 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN
connection_typeINTERNAL QUICK DISCONNECT ALL ENDS
connection_stylePLAIN ALL ENDS
style_designatorMALE COUPLING HALF
nominal_thread_size0.125 INCHES ALL ENDS IN
quick_disconnect_methodSPRING PUSH-PULL ALL ENDS
thread_series_designatorNPTF ALL ENDS
quick_disconnect_nominal_size0.281 INCHES ALL ENDS IN
NSN4730-01-042-5266
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: BST-1 · 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: 0.281 INCHES ALL ENDS IN
•
LEG LENGTH: 0.203 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.125 INCHES ALL ENDS IN
TECHNICAL CHARACTERISTICS
CONNECTION STYLEPLAIN ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE FIRST FLUID END CONNECTION
CONNECTION TYPEINTERNAL QUICK DISCONNECT ALL ENDS
STYLE DESIGNATORMALE COUPLING HALF
OVERALL LENGTH1.000 INCHES MINIMUM AND 1.060 INCHES MAXIMUM IN
QUICK DISCONNECT NOMINAL SIZE0.281 INCHES ALL ENDS IN
LEG LENGTH0.203 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.125 INCHES ALL ENDS IN
MATERIALCOPPER ALLOY BODY
QUICK DISCONNECT METHODSPRING PUSH-PULL ALL ENDS
SUBSTITUTES & CROSS-REFERENCES 1
4730PL2059509Reference 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 BST-1?
BST-1 is a COUPLING HALF,QUICK DISCONNECT.
What parts can replace BST-1?
There is 1 known substitute for BST-1: 4730PL2059509. Substitute compatibility should be verified for your specific system.
What is the NSN for BST-1?
BST-1 is cataloged in the U.S. Government catalog under NSN 4730-01-042-5266. This indicates validated use in U.S. government and defense supply chains.
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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.