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MILC1258 — INSERT,ELECTRICAL CONNECTOR

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

MILC1258: INSERT,ELECTRICAL CONNECTOR.

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 U.S.

Government catalog 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
NIINs: 001746835, 002422954, 002422955, 002422956, 002422957, 002422958, 002422963, 002477115, 002477117, 002777003, 002785738, 002899303, 007073068
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
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
•
ASSEMBLY CLEARANCE RADIUS: 0.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT, SPRING CAP
•
NOMINAL THREAD SIZE: 0.125 INCHES IN
•
NONDEFINITIVE SPEC/STD DATA: B TYPE
•
HEIGHT: 1.812 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: NPT
•
THREAD QUANTITY PER INCH: 27
•
MATERIAL: STEEL OR COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS
ASSEMBLY CLEARANCE RADIUS0.312 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT, SPRING CAP
NOMINAL THREAD SIZE0.125 INCHES IN
NONDEFINITIVE SPEC/STD DATAB TYPE
HEIGHT1.812 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORNPT
THREAD QUANTITY PER INCH27
MATERIALSTEEL OR COPPER ALLOY OVERALL
SUBSTITUTES & CROSS-REFERENCES 4
Q2421Reference document
Same NSN cross-reference
Reference document — Secondary reference
X-2054Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
75817Reference document
Same NSN cross-reference
Reference document — Secondary reference
D75817Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MILC1258?
MILC1258 is a INSERT,ELECTRICAL CONNECTOR.
What parts can replace MILC1258?
There are 4 known substitutes for MILC1258: Q2421, X-2054, 75817 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MILC1258?
MILC1258 is cataloged in the U.S. Government catalog under NSN 4730-00-174-6835. 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.