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MILC1258 ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The INSERT,ELECTRICAL CONNECTOR is a the manufacturer industrial component. Key specifications include height: 0.269 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN, material: STEEL OVERALL, oil_capacity: 0.002 FLUID OUNCES, shank_length: 0.227 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN, shank_diameter: 0.190 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN, style_designator: STRAIGHT, W/BALL CHECK, W/SHOULDER. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-174-6835, 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
MILC1258
NSN: 4730-00-174-6835
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
height0.269 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN
materialSTEEL OVERALL
oil_capacity0.002 FLUID OUNCES
shank_length0.227 INCHES MINIMUM AND 0.289 INCHES MAXIMUM IN
shank_diameter0.190 INCHES MINIMUM AND 0.193 INCHES MAXIMUM IN
style_designatorSTRAIGHT, W/BALL CHECK, W/SHOULDER
surface_treatmentNICKEL OR CADMIUM OVERALL
assembly_clearance_radius0.101 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
nondefinitive_spec/std_dataG TYPE AND 1 SIZE
NSN4730-00-174-6835
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: MILC1258 · 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
•
THREAD QUANTITY PER INCH: 27
•
ASSEMBLY CLEARANCE RADIUS: 0.312 INCHES NOMINAL IN
•
HEIGHT: 1.812 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
•
STYLE DESIGNATOR: STRAIGHT, SPRING CAP
•
NONDEFINITIVE SPEC/STD DATA: B TYPE
•
MATERIAL: STEEL OR COPPER ALLOY OVERALL
•
SCREW THREAD SERIES DESIGNATOR: NPT
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH27
ASSEMBLY CLEARANCE RADIUS0.312 INCHES NOMINAL IN
HEIGHT1.812 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.125 INCHES IN
STYLE DESIGNATORSTRAIGHT, SPRING CAP
NONDEFINITIVE SPEC/STD DATAB TYPE
MATERIALSTEEL OR COPPER ALLOY OVERALL
SCREW THREAD SERIES DESIGNATORNPT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
132143Interchangeable
interchangeable cross-reference
interchangeable
84777Interchangeable
interchangeable cross-reference
interchangeable
75817Interchangeable
interchangeable cross-reference
interchangeable
MILC1258Interchangeable
interchangeable cross-reference
interchangeable
600B-1Interchangeable
interchangeable cross-reference
interchangeable
1300-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MILC1258?
MILC1258 is a INSERT,ELECTRICAL CONNECTOR.
What parts can replace MILC1258?
There are 19 known substitutes for MILC1258: 132143, 84777, 75817 and 16 more. Substitute compatibility should be verified for your specific system.
Is MILC1258 still available?
MILC1258 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026