PartsTable
Technical Data Sheet
1A ✓ Verified by PartsTable
· MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The SWITCH,TELEPHONE,SELECTOR is a the manufacturer industrial component. Key specifications include phase: THREE, width: 1.000 INCHES NOMINAL IN, height: 0.238 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN, length: 1.000 INCHES NOMINAL IN, weight: 25.0 POUNDS NOMINAL LBS, arm_size: 3.000 FEET FT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-3043, 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
MRO MRO_GENERAL 1A
NSN: 5310-00-010-3043
FSC: 5310
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
phaseTHREE
width1.000 INCHES NOMINAL IN
height0.238 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
length1.000 INCHES NOMINAL IN
weight25.0 POUNDS NOMINAL LBS
arm_size3.000 FEET FT
diameter0.041 INCHES NOMINAL STOCK IN
materialCOPPER
tip_typeDESOLDERING
feed_typeHAND SCREW, SLIDING
nut_styleCASTELLATED, HEXAGON
unit_typeSAFETY
NSN5310-00-010-3043
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1A · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
THREAD SERIES: UNF
THREAD CLASS: 2B
NUT STYLE: CASTELLATED, HEXAGON
MATERIAL: STEEL OVERALL
NONDEFINITIVE SPEC/STD DATA: A TYPE
THREAD QUANTITY PER INCH: 28
WIDTH ACROSS FLATS: 0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
NOMINAL THREAD SIZE: 0.250 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIESUNF
THREAD CLASS2B
NUT STYLECASTELLATED, HEXAGON
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATAA TYPE
THREAD QUANTITY PER INCH28
WIDTH ACROSS FLATS0.428 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
NOMINAL THREAD SIZE0.250 INCHES IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
NUT HEIGHT0.274 INCHES MINIMUM AND 0.288 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
VE-1173Interchangeable
interchangeable cross-reference
interchangeable
X450Interchangeable
interchangeable cross-reference
interchangeable
S-2035Interchangeable
interchangeable cross-reference
interchangeable
484394Interchangeable
interchangeable cross-reference
interchangeable
3026010-2Interchangeable
interchangeable cross-reference
interchangeable
G-103043-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1A?
1A is a SWITCH,TELEPHONE,SELECTOR. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1A?
There are 15 known substitutes for 1A: VE-1173, X450, S-2035 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1A?
1A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-010-3043. This indicates validated use in U.S. government and defense supply chains.
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